Entries |
Document | Title | Date |
20080205687 | Magnetic circuit for electrodynamic moving voice coil actuators - The invention is a novel circuit wherein maximum shove is achieved yet the transducer's height profile is minimized. The profile is minimized by using mated beveled surfaces on an annular magnet and the top plate which prevents the top plate from reaching saturation and reduces the reluctance f the magnetic flux path. A novel anti-fringe geometry to reduce flux leakage and net saturation in the center post improves the magnetic reluctance of the circuit. An external housing assembly is provided with integral suspension elements for radial stiffness and axial compliance and for aligning the circuit within the housing to prevent cocking and resulting distortion. | 08-28-2008 |
20080205688 | Speaker - A speaker includes: a magnetic circuit; a voice coil bobbin; a voice coil; a diaphragm; a frame to which the outer circumference of the diaphragm is connected via a suspension; and a spider to support the center area of the diaphragm. A magnet unit, a pole piece, a pole piece, and a yoke are included in the magnetic circuit. The yoke has a ring shape with a center opening, and is disposed at the rear of the magnet unit. The magnet unit has a ring structure having a plurality of empty portions arranged equiangularly, and the spider includes a main body and a plurality of legs extending radially outwardly from the main body and is disposed inside the magnetic circuit such that distal end tips of the legs pass beyond the inner diameter of the ring structure of the magnet unit. | 08-28-2008 |
20080279415 | SPEAKER CONE AND DUST CAP ASSEMBLY - A speaker cone and dust cap assembly for a speaker is disclosed having an acoustic web for a dust cap that has a lower surface with a convex shape; a speaker cone with an end web, sized and arranged to close the first end of the former distal the magnet assembly of the speaker, the end web comprising a concave surface shaped conformally with a central portion of the lower surface of the acoustic web; and having the end surface of the end web fixed to the central portion of the lower surface of the acoustic web over substantially the entire surface of the end surface of the end web. The speaker cone may have a cylindrical extension wrapping the first end of the former. The cylindrical extension and the first end of the former may have aligned vents. | 11-13-2008 |
20080298630 | Dynamic Type Unit with Multiple Magnetic Field System - The present invention relates to a dynamic type unit with a multiple magnetic field system, and more particularly, to a dynamic type unit including a magnet, a diaphragm and a moving coil such as a microphone or a speaker, wherein an auxiliary magnet is mounted around a main magnetic field formed by the magnet so as to form an auxiliary magnetic field to thereby correct a waveform of each individual distorted frequency generated from the microphone or the speaker, which results in realization of the best sound whose quality is closest to that of an original sound. | 12-04-2008 |
20090003644 | ELECTROACOUSTIC TRANSDUCER - An electroacoustic transducer includes a magnetic circuit unit that forms a magnetic gap, a voice coil inserted into the magnetic gap, and a diaphragm to which the voice coil is connected. The diaphragm has a central portion having an outer peripheral edge and an annular portion disposed underneath the central portion. The annular portion has an outer peripheral edge corresponding to the outer peripheral edge of the central portion, and an inner peripheral edge secured to the magnetic circuit unit. The diaphragm further has a joint portion formed at the outer peripheral edges of the central and annular portions, and the outer peripheral edges are joined together. The voice coil is disposed underneath the central portion of the diaphragm and joined to the joint portion. | 01-01-2009 |
20090016560 | Spring reverberator and assembling method thereof - The present invention discloses a spring reverberator and an assembling method thereof, in which the spring reverberator comprises: a casing, a driving transducer received in the casing, a pickup transducer received in the casing, and coil springs vibratingly coupled to the driving and pickup transducers. The driving and pickup transducers respectively include a vibration unit and a magnetic core. The vibration unit comprises a support plate including at least one cut-out groove, through which a wire is soldered directly to the support plate. The vibration unit and the magnetic core are prepared in a modular type to be inserted in a sliding manner and fixed in the casing. | 01-15-2009 |
20090060252 | LOUDSPEAKER - A loudspeaker has a frame, a magnetic circuit, a voice coil body, a first edge, a diaphragm, a second edge, and a damper. The magnetic circuit is provided with a magnetic gap, and is supported by the frame. The voice coil body is disposed movably with respect to the magnetic gap. The outer peripheral end of the diaphragm is coupled to the frame via the first edge, and the inner peripheral end thereof is coupled to the voice coil body. The second edge is coupled to the frame at a position closer to the magnetic circuit than the first edge. The damper is disposed closer to the magnetic circuit than the diaphragm, the outer peripheral end thereof is coupled to the frame via the second edge, and the inner peripheral end thereof is coupled to the voice coil body. | 03-05-2009 |
20090116680 | LOUDSPEAKER - Loudspeaker has frame, magnetic circuit, voice coil, diaphragm, first combination and second combination. First combination and second combination are both provided closer to magnetic circuit than diaphragm, the inner rims of which are connected to voice coil while the outer rims are to frame. First combination has first damper and first edge wherein first edge has first edge protrusion protruding in a direction toward diaphragm. Second combination has second damper and second edge wherein second edge has second edge protrusion protruding in an opposite direction to the protruding direction of first edge protrusion. This structure obtains loudspeaker that distortion is suppressed and weight reduction is easy for an excursion part thus improved in driving efficiency. | 05-07-2009 |
20090190794 | ACOUSTIC TRANSDUCER - This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments. | 07-30-2009 |
20090226027 | Structure of a voice coil assembly - A structure of a voice coil assembly includes a plate, a top board, suspending arms and fixtures. The plate has a top and two opposite sides. The top board is disposed on the top of the plate. The suspending arms extend from the two sides of the plate and are connected to the fixtures. A pair of resilient sections is provided between the suspending arms and the fixtures. The resilient sections are formed in a curved, arcuate or wavy shape. The suspending arm has a cross-section in a flat shape. | 09-10-2009 |
20090252369 | Loudspeaker driver - A loudspeaker driver that includes a suspended diaphragm and at least one voice coil disposed lateral to the suspended diaphragm, suspended in a magnetic field and coupled to the diaphragm. | 10-08-2009 |
20090290749 | DYNAMIC ELECTRO-ACOUSTIC TRANSDUCER AND EARPHONE - There is thus provided a dynamic electro-acoustic transducer having a moving coil ( | 11-26-2009 |
20090304222 | LOW COST MOTOR DESIGN FOR RARE-EARTH-MAGNET LOUDSPEAKERS - A loudspeaker magnetic motor utilizes a voice coil with two or more wire coils that are connected in parallel and that are layered on top of one another. The motor utilizes, as a magnetic field source, a permanent magnet and, more particularly, a permanent magnet that includes a rare earth metal such as a neodymium boron iron magnet. | 12-10-2009 |
20100014704 | SPHERICAL SPEAKER - A spherical speaker has a spherical diaphragm, a moving coil, and a magnet. To improve the sound quality of the spherical speaker, the magnet is a disk magnet and the spherical diaphragm is divided into an internal area and an external area. | 01-21-2010 |
20100086169 | SPEAKER - There is provided a speaker allowing an air in a space between a diaphragm and a frame not to leak outside, and allowing connecting wires electrically connected to the voice coil to be guided out to an outside. | 04-08-2010 |
20100135520 | DIAPHRAGM AND SPEAKER DEVICE - A diaphragm and a speaker unit which can prevent generation of abnormal sound by suppressing rolling phenomenon. The speaker unit has a diaphragm. The diaphragm includes a portion for supporting a voice coil, and a sound emitting portion formed continuously to one end thereof. The voice coil supporting portion has a shape extending reversely to the sound emitting direction. The sound emitting portion includes a step portion having a surface substantially perpendicular to the sound emitting direction, and a bent portion having a cross-section bent toward the inside of the voice coil supporting portion from one end of the step portion. Consequently, the voice coil supporting portion is movable to describe an arc having a radius substantially equal to the radius of curvature at the bent portion of the voice coil supporting portion and a basic point substantially identical to the center of the bent portion in the bending direction as the voice coil moves in the sound emitting direction or in the reverse direction. Rolling phenomenon can thereby be retarded, the voice coil supporting portion can be prevented from colliding against a magnetic circuit when the speaker unit is driven and generation of abnormal sound can be prevented. | 06-03-2010 |
20100158307 | ULTRASONIC SPINDLE SYSTEM - It is possible to stably supply an electric signal to an ultrasonic generation element without causing friction or damage on parts or without requiring periodical parts exchange. A reception coil ( | 06-24-2010 |
20100166248 | Speaker with heat dissipation arrangement - A speaker having a heat-transfer upper bearing cup fastened to the bottom side of the cone paper, a bottom bearing cup set between the heat-transfer upper bearing cup and the damper, and a heat-transfer sound coil holder capped on the sound coil with bottom hooks thereof fastened to the heat-transfer upper bearing cup and the damper to establish with the heat-transfer upper bearing cup a heat dissipation structure for quick dissipation of heat from the sound coil during the operation of the speaker, thereby raising the output power. | 07-01-2010 |
20100172534 | MAGNETIC STRUCTURE FOR AN IRONLESS ELECTRODYNAMIC-LOUDSPEAKER MOTOR, MOTORS AND LOUDSPEAKERS - A magnetic structure generating a magnetic field for an ironless motor of an electrodynamic loudspeaker having a mobile coil, wherein the magnetic structure generates a magnetic field in a gap in which the coil is arranged. The magnetic structure includes of a stack of three magnets corresponding to one intermediate magnet and two top and bottom covering magnets, the magnets forming a straight gap border and being located side by side, the intermediate magnet having a radial magnetic polarization, the covering magnets having identical magnetic polarizations and remanent magnetizations. The covering magnets have a radial or axial magnetic polarization. When magnetic polarization of the covering magnets is radial, remanent magnetization of each covering magnet is higher than remanent magnetization of the intermediate magnet, and when magnetic polarization of the covering magnets is axial, remanent magnetization of each covering magnet is lower than remanent magnetization of the intermediate magnet. Motors are provided. | 07-08-2010 |
20100177927 | LOUDSPEAKER AND ELECTRONIC APPARATUS USING THE SAME - In a loudspeaker, three magnets are disposed to provide magnetic gaps therebetween and a voice coil is fit therein. The magnets disposed at both sides are magnetized so that their opposing poles exhibit the same magnetic polarity. The magnet in the middle has its magnetic poles in the direction perpendicular to the line connecting the poles of the side magnets. The side magnets are fixed to a plate made of non-magnetic material. Those magnetic poles of the side magnets and the middle magnet not facing the magnetic gaps are magnetically coupled by a magnetic member. | 07-15-2010 |
20100177928 | SPEAKER AND ELECTRONIC APPARATUS EMPLOYING THE SAME - A loudspeaker includes a diaphragm, a voice coil fixed to the diaphragm, a first magnet having a first pole surface facing an inner side of the voice coil, a second magnet located inside the inner side of the voice coil, and a first magnetic fluid provided between the first pole surface of the first magnet and the voice coil. The first magnet has the first pole surface facing the inner side of the voice coil. The second magnet has a second pole surface located inside the inner side of the voice coil such that a magnetic flux passing through the first pole surface of the first magnet crosses the voice coil in a direction perpendicular to the voice coil and a vibration direction. The first magnetic fluid contacts the first pole surface and the voice coil. The loudspeaker has a small thickness but can produce a high audio output, while preventing rolling. | 07-15-2010 |
20100215207 | SPEAKER - In a speaker, a first space enclosed by the surface of a second edge close to a magnetic circuit body, a suspension holder), the outer circumferential surface of a voice coil body, the magnetic circuit body, and a frame is airtight to the atmosphere outside the speaker, to make a first space function as an air suspension. The voice coil body is supported with a first edge and a second edge, and with the aid of the springiness of gas inside a first space. Hence, an equivalent, low Young's modulus can be set to the first edge and the second. Consequently, deformation of the diaphragm connected to the first edge is reduced during sound reproduction, thereby reducing disturbance in frequency response in the middle and high ranges. | 08-26-2010 |
20100220888 | Electromagnetic vibrator and producing method - An electromagnetic vibrator includes an upper basin frame, an induction coil, and a lower basin frame, wherein the upper basin frame includes a supporting frame, a vibration sheet, and a suspension edge element. The vibration sheet and the suspension edge are integrally formed together via mold injecting, so as to achieve variety of style and colors of the speaker. The manufacturing method of the electromagnetic vibrator improves the traditional producing process of a speaker by minimizing the gluing procedure thereof. The machinery equipments replace the traditional manual process. The special coupling structure and unique process of the electromagnetic vibrator also reduce the amount of using glue, so that the manufacturing cost is minimized, the un-stability of manually operation process is minimized, the quality and production rate is enhanced, and the process is relatively more environmental friendly. | 09-02-2010 |
20100254565 | Magnetic circuit - A magnetic circuit includes a cylindrical yoke member having an inner circumferential surface and a collar formed at one end thereof and turned back substantially at right angles, and a plurality of permanent magnet segments of a partially circular arc in cross section. Each of the permanent magnets has an outer surface attracted magnetically to the inner circumferential surface of the cylindrical yoke member, and one end face attracted magnetically to the collar of the cylindrical yoke member. The magnetic circuit is applied to an actuator or a speaker. | 10-07-2010 |
20100296689 | LOUDSPEAKER SUSPENSION - A loudspeaker comprising a frame, a voice coil assembly disposed within the frame, a magnet assembly disposed within the frame and a first suspension element having an outer edge and an inner edge, wherein the outer edge is coupled to the voice coil assembly and the inner edge is coupled to the magnet assembly. | 11-25-2010 |
20100296690 | ELECTRO-ACOUSTIC TRANSDUCER - An electro-acoustic transducer is disclosed. The electro-acoustic transducer includes a case, a magnetic circuit and a vibrating device. The magnetic circuit includes a magnetic bowl coupled to the case, a magnet positioned in the magnetic bowl, a pole plate covering the magnet. A magnetic gap is formed by the magnet and the magnetic bowl. The vibrating device includes a diaphragm vibrating along a vibrating direction, and a voice coil connected to the diaphragm. The pole plate has a first top surface, a first bottom surface, and a first through hole extending from the first top surface to the first bottom surface. A projection of the first through hole along the vibrating direction overlaps at least a part of the magnetic gap. | 11-25-2010 |
20110033078 | VOICE COIL LEAD WIRE AND LOUDSPEAKER USING THE SAME - The present disclosure relates to a voice coil lead wire and a loudspeaker using the same. The voice coil lead wire includes a lead wire structure and a core wire structure. The lead wire structure includes at least one lead wire. The core wire structure includes at least one carbon nanotube wire structure. The carbon nanotube wire structure includes a plurality of carbon nanotubes. The at least one lead wire winds around the at least one carbon nanotube wire structure in a helix manner or a twisted manner. | 02-10-2011 |
20110051986 | Magnetic System for an Electroacoustic Transducer - A magnetic system for an electroacoustic transducer, including an annular magnet which provides a magnetic field for a moving coil. The magnetic system has a first magnetic element forming a base plate and at least one second magnetic element forming a cover plate. The annular magnet is arranged between the first and second magnetic element. The annular magnet is held by the magnetic forces acting between the first magnetic element and the magnet, or between the magnet and the second magnetic element. | 03-03-2011 |
20110069859 | SPEAKER DEVICE - A flat speaker device capable of emitting loud reproduced sound with a relatively simple configuration is provided. The speaker device includes a diaphragm, a frame supporting the diaphragm vibratably in the vibration direction, a magnetic circuit disposed in the frame, and a driving member for driving the diaphragm. The driving member includes a voice coil movably disposed in a magnetic gap of the magnetic circuit, a driving part formed movably in a direction different from the vibration direction of the diaphragm, and an angle conversion and transmission part, one end of which is angle-variably joined to the driving part and another end of which is angle-variably joined to the diaphragm. The angle conversion and transmission part has rigidity and is obliquely disposed with respect to each of the vibration direction of the diaphragm and the moving direction of the driving part. | 03-24-2011 |
20110103638 | VOICE COIL SUPPORT FOR A COIL TRANSDUCER MOTOR STRUCTURE - The invention relates to a voice coil support ( | 05-05-2011 |
20110116677 | DIAPHRAGM AND LOUDSPEAKER USING THE SAME - A diaphragm includes a central portion and an edge portion around the central portion. The central portion includes a plurality of carbon nanotubes therein. The central portion is a carbon nanotube structure or a carbon nanotube composite structure. A loudspeaker using the diaphragm is also disclosed. The loudspeaker includes the diaphragm and a voice coil connected to the diaphragm. The voice coil is connected to an outer periphery of the central portion or a joint portion between the central portion and the edge portion. | 05-19-2011 |
20110135139 | SPEAKER DEVICE - A speaker device includes a voice coil unit and a diaphragm linked to the voice coil unit. A first supporting unit and a second supporting unit elastically support the end portions of the voice coil unit so that the voice coil portion of the voice coil unit can vibrate within the magnetic gap in the direction of the face thereof. Each of the first supporting unit and the second supporting unit has a configuration that is in a shape bent so as to extend up and bend down from an end that is fixed to a fixing position. Thus, a speaker device in which the voice coil unit can vibrate with a greater amplitude is provided. | 06-09-2011 |
20110135140 | SPEAKER APPARATUS - A light weight and low profile speaker apparatus is provided. In one embodiment, the speaker apparatus includes: a frame member; a magnetic circuit; a supporting member disposed on a bottom portion of the frame member for securing and supporting the magnetic circuit at an opposite circumferential end portion of a circumferential wall portion of a first yoke relative to a plate portion; a voice coil unit disposed inside a magnetic gap in the magnetic circuit; a coupling member disposed outward of the circumferential wall portion of the first yoke; and a diaphragm having an inner circumferential end portion coupled to the coupling member. The voice coil unit and the coupling member are joined by a joint member that extends in a direction transverse to the circumferential wall portion of the first yoke; and a space where the joint member joining the voice coil unit and the coupling member can move is formed in each of the circumferential wall portion of the first yoke and the supporting member. | 06-09-2011 |
20110150265 | SPEAKER - A speaker includes a magnetic circuit defining a magnetic gap, a diaphragm defining a central part and peripheral part surrounded the central part of the diaphragm, a coil defining an end suspended in the magnetic gap, an elastic plate defining a central flat coupled to the central part of the diaphragm and a side coupled to another end of the coil. And the side of the elastic plate comprises a first part extending perpendicularly from the central flat toward the peripheral part of the diaphragm and a second part extending parallel to the central flat for coupling another end of the coil. | 06-23-2011 |
20110158461 | APPARATUS FOR DRIVING VOICE COIL ACTUATOR OF CAMERA AND METHOD THEREOF - An apparatus and a method for driving a voice coil actuator of a camera are disclosed. In the apparatus for driving a voice coil actuator of a camera, when an input shaping execution unit generates a shaping signal using a resonance frequency of the voice coil actuator to output a drive control signal subjected to input shaping, a drive circuit unit controls an operation of the voice coil actuator connected to a rear end according to the drive control signal using the shaping signal as an initial input. The shaping signal is used for removing resonance of the voice coil actuator and may be one of a 2-step shaping signal, a multi-step shaping signal having 4 or more steps, a linear shaping signal, a toggle shaping signal and the like. Accordingly, it is possible to control undesirable vibration by reducing high resonance response characteristics of the voice coil actuator and it is possible to implement an autofocus function more precisely. | 06-30-2011 |
20110200223 | SPEAKER UNIT INCLUDING DIAPHRAGM HAVING A VOICE COIL ATTACHED THERETO - A speaker unit that can prevent a lead from being broken is provided. The speaker unit includes: a diaphragm; a voice coil which is secured to the diaphragm; and a lead which is connected to the voice coil to energize the voice coil. The diaphragm includes an annular securing portion which has the voice coil secured thereto, and an outer projection which projects with respect to the securing portion at a side corresponding to a surface of the diaphragm having the voice coil secured thereto and extends along the securing portion. The outer projection has a top. The outer projection has the top partially recessed to have a recess. The lead extends across the recess to traverse the outer projection. | 08-18-2011 |
20110235848 | FLAT ACOUSTIC TRANSDUCER AND METHOD FOR DRIVING THESAME - A flat acoustic transducer ( | 09-29-2011 |
20110243369 | Device with dynamic magnet loudspeaker - The present invention is to provide a device with dynamic magnet speaker, which comprises a first housing member having a wall and a first magnetic element fixed on an inner surface of the wall; a seat having a first side connected to the first housing member to define a first receiving space between the first housing member and the first side of the seat; and a hollow tube fixedly provided on the seat and corresponding in position to the first magnetic element, wherein a first coil unit is fixedly mounted around the hollow tube, and the hollow tube extends toward the first magnetic element and is either mounted around an outer periphery of the first magnetic element or inserted in a first central hole of the first magnetic element, so as to not only reduce the weight and spatial volume thereof, but also substantially lower the directivity of sound produced. | 10-06-2011 |
20110249859 | VOICE COIL AND SMT MICRO SPEAKER USING SAME - A voice coil using a surface mount technology (SMT) to connect the voice coil and an electrode to each other, and a SMT speaker using the voice coil. A voice coil assembly includes a voice coil formed by stacking a plurality of laminated metal plates; and a flexible printed circuit board (FPCB) for impedance matching between the voice coil and an electrode terminal for connecting an external device and for connecting the voice coil to the electrode terminal. The laminated metal plates of the voice coil are connected in series or in parallel to each other. An active device is installed on the FPCB so as to amplify a signal input through the electrode terminal and to apply the signal to the voice coil. Since the voice coil is formed by stacking the laminated metal plates and is connected to the electrode terminal through the FPCB, a SMT is used to manufacture the SMT speaker, thereby improving productivity and reliability. | 10-13-2011 |
20110299717 | LOUDSPEAKER WITH REPLACEABLE MOTOR ASSEMBLY - A loudspeaker is provided in which precise alignment is obtained between the frame and motor assembly before they are connected to one another so that a voice coil coupled to the frame may be properly radially and vertically positioned with respect to a magnetic gap in the motor assembly while allowing the motor assembly and frame to be easily and quickly separated from one another to perform repairs or complete replacement of the motor assembly. | 12-08-2011 |
20110317868 | ELECTROACOUSTIC TRANSDUCER - A diaphragm has a back plane which has a voice coil attached thereto, and a front plane which is located on the side opposite to the back plane. The diaphragm also includes a center portion, a boundary portion which surrounds the center portion and has the voice coil attached thereto, an outer circumferential portion which surrounds the boundary portion, and an edge which surrounds the outer circumferential portion. A frame has a support portion which supports the back plane of the diaphragm. The outer circumferential portion has a convex shape which protrudes in the thickness direction extending from the front plane to the hack plane with respect to the edge. | 12-29-2011 |
20120008815 | LOUDSPEAKER THAT IS AXIALLY STABILIZED OUT OF THE DIAPHRAGM SUSPENSION PLANE - An improved mid to high-frequency loudspeaker of the type having a central dome diaphragm having an outer periphery, and in one embodiment an outer ring-radiator diaphragm portion defining an inner periphery and an outer periphery, the ring-radiator diaphragm being attached at its inner periphery to an armature voice coil assembly and at its outer periphery to a diaphragm chassis in a first plane. The central diaphragm portion is attached at its outer periphery to either the inner periphery of the outer ring-radiator diaphragm or the voice coil armature, and the improvement comprises axially-located stabilizing means attached to the central diaphragm portion, or alternatively a central stabilizing framework, in a second plane parallel to the first plane and that is of sufficient distance from the first plane to provide leverage sufficient to stabilize the diaphragm to minimize rocking, allow improved alignment of the voice coil allowing tighter tolerances between the voice coil and magnet assembly, thus improving performance and minimizing distortion. | 01-12-2012 |
20120063632 | DRIVE CONTROL CIRCUIT FOR VIBRATION SPEAKER - A drive signal generating unit generates a drive signal having a cyclic waveform containing a zero period in a vibration mode. A driver unit generates the drive current in response to the drive signal generated by the drive signal generating unit so as to supply the drive current to a voice coil. An induced voltage detector detects the induced voltage occurring in the voice coil during a nonconducting period. A zero-cross detector detects the zero cross of the induced voltage detected by the induced voltage detector. The drive signal generating unit estimates the eigen-frequency of a vibration speaker from a detected position of the zero cross and brings the frequency of the drive signal close to the estimated eigen-frequency. | 03-15-2012 |
20120076343 | MOTOR DRIVE CIRCUIT - A motor-drive circuit includes: a filter circuit to attenuate a frequency band including a resonance frequency of an actuator in a target-current signal, which is a digital signal indicating a target value of a driving current to be supplied to a voice-coil motor that drives the actuator; a digital-analog converter to convert an output signal of the filter circuit into an analog signal, to be outputted as a current-control signal; and a driving circuit to supply the driving current to the motor in accordance with the current-control signal, the filter circuit including: a digital-notch filter to attenuate a frequency band around the resonance frequency in the target-current signal; and a digital-low-pass filter to attenuate a frequency band greater than or equal to a predetermined frequency in the output signal of the digital-notch filter, the digital-low-pass filter having a sampling frequency higher than a sampling frequency of the digital-notch filter. | 03-29-2012 |
20120121121 | SPEAKER HAVING A HORIZONTAL FORMER - A speaker includes a frame, a sound radiating surface, and a suspension that couples the sound radiating surface to the frame. A horizontal former is coupled to the radiating surface. The former extends substantially horizontally outward of a peripheral portion of the radiating surface, to a peripheral portion that is separate from the suspension. A coil is coupled to the peripheral portion of the horizontal former. Other embodiments are also described and claimed. | 05-17-2012 |
20120148085 | DIAPHRAGM AND SPEAKER DEVICE PROVIDED WITH THE SAME - A diaphragm is provided with a plurality of thick portions radially from an inner circumferential side to an outer circumferential side. The thick portions are composed of at least two kinds having different lengths in a radiation direction and formed to be gradually thinner in the radiation direction from the inner circumferential side to the outer circumferential side. With this configuration, separate vibrations in the diaphragm can be suppressed. Further, a speaker device provided with the diaphragm having the above-described configuration can reproduce sounds faithfully in accordance with input signals. | 06-14-2012 |
20120207338 | VORTEX COOLING OF VOICE COILS - A low frequency transducer arrangement includes at least one substantially annular magnet. A voice coil is disposed within and concentric with the magnet. A pole is disposed within and concentric with the voice coil. An air gap is defined between the magnet and the pole. The pole includes a bottom half having a downwardly facing axial recess. A plurality of first air passages extend laterally from the axial recess and fluidly interconnect the recess and the air gap. A top half has an upwardly facing axial recess. A plurality of second air passages extend laterally from the upwardly facing axial recess and fluidly interconnect the upwardly facing recess and the air gap. The first air passages and/or the second air passages are non-radially oriented. | 08-16-2012 |
20120207339 | MULTIPLE MAGNETIC AIR GAP MOTOR - A low frequency transducer arrangement includes a substantially cylindrical structure surrounding a pole piece. The pole piece and the substantially cylindrical structure define a substantially cylindrical air gap therebetween. Two opposite ends of the air gap are both open and separated from each other in an axial direction. A first magnet is disposed in either the pole piece or the substantially cylindrical structure. A second magnet is separated in the axial direction from the first magnet by a middle magnetic gap. The second magnet is disposed in either the pole piece or the substantially cylindrical structure. The first and second magnets provide flux in a same direction in the middle magnetic gap. A top magnetic gap is disposed axially adjacent the first magnet and opposite the middle magnetic gap. A bottom magnetic gap is disposed axially adjacent the second magnet and opposite the middle magnetic gap. A voice coil is at least partially disposed in the air gap and operates in the middle magnetic gap. | 08-16-2012 |
20120230535 | ELECTRONIC DEVICE - An electronic device includes a jack electrically connecting an outer speaker, a power controller, an audio generator electrically connecting the jack and the power controller, and an inner speaker. The inner speaker includes a housing, a magnet, a vibrating element, and a first electromagnetic inducting coil. The magnet and the vibrating element are configured in the housing. The vibrating element electrically connects the audio generator via the jack to be vibrated relatively to the magnet for sounding. The first electromagnetic inducting coil is configured on the vibrating element and electrically connected to the power controller to generate electricity induced by a magnetic field of the magnet. A power storage is charged by the electricity via the power controller. Through the jack and the power controller, the power storage is charged by electricity generated by a second electromagnetic inducting coil of the outer speaker. | 09-13-2012 |
20120257782 | ACOUSTIC TRANSDUCER - This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments. | 10-11-2012 |
20120263339 | SPEAKER - A damper, which is an element of a speaker and suppresses the rolling of a voice coil unit, includes a corrugated structure portion at its inner periphery and a leaf spring at its outer periphery. By coupling the corrugated structure portion to the voice coil unit and coupling the leaf spring to the frame, the distortion of a speaker can be reduced and the driving efficiency can be improved. | 10-18-2012 |
20120263340 | LOW PROFILE LOUDSPEAKER SUSPENSION SYSTEM - A surround suspension system for a low profile loudspeaker transducer having a former, diaphragm, and loudspeaker magnet assembly, wherein the former is connected to a voice coil and a upper end of the former that is opposite the voice coil is shown. The loudspeaker magnet assembly includes an annular outer magnet having a top surface and the surround suspension system may include a surround suspension member. The surround suspension member includes an outer edge that is attached to the top surface of the annular outer magnet, and inner edge that is attached to the upper end of the former. | 10-18-2012 |
20120294474 | Moving-Magnet Electromagnetic Device with Planar Coil - An electromagnetic device includes a housing, a planar coil disposed inside the housing, and a magnetic diaphragm disposed inside the housing, wherein the plane of the planar coil is substantially in parallel with the plane of the magnetic diaphragm, wherein the planar coil is separated from the magnetic diaphragm, and wherein the magnetic diaphragm is moveable in the presence of an exterior pressure. | 11-22-2012 |
20120328147 | SPEAKER - A speaker is disclosed herein. And, in configuring a magnetic circuit of the speaker, unlike the vertical polarity alignment of the related art speaker, the polarities of the magnet are configured to be horizontally aligned, and a vibration system is configured on an inner side surface of the vertically configured magnetic circuit. Accordingly, by having the magnetic circuit encircle the vibration system, unlike in the related art speaker, wherein the height of the speaker corresponds to a sum of the thickness of the vibration system and the thickness of the magnetic circuit, the speaker may be configured only by using the height of the magnetic circuit. Furthermore, by being capable of reducing the height of the speaker, even if the volume of the magnet is being increased, the sound effect of the speaker may be enhanced. | 12-27-2012 |
20130010999 | ELECTROMECHANICAL CONVERSION SYSTEM WITH MOVING MAGNETS; ACOUSTIC DIFFUSER COMPRISING SAID SYSTEM AND A MOVING MEMBER THAT GENERATES SOUND WAVES - The invention relates to an electromechanical conversion system comprising: a fixed supporting structure, a movable element with respect to the fixed structure; at least one excitation coil; and at least one permanent magnet for generating an excitation magnetic field. The permanent magnet is integral with the movable element and the coil is integral with the fixed supporting structure. Moreover, a ferromagnetic circuit is provided fixed with respect to the structure and cooperating with the permanent magnet. | 01-10-2013 |
20130039528 | LOUDSPEAKER STRUCTURE WITH INNER FRAME - A loudspeaker includes an outer frame with an annular magnet partially exposed from a bottom thereof; a voice coil located inside the annular magnet; a diaphragm glued to between an expanded front opening of the outer frame and the voice coil; a flexible suspension ring having an outer edge fixed to a stepped section of the outer frame and a central opening edge clearance-fitted to a middle/front portion of the annular magnet; and an inner frame having a front portion fitted around the voice coil, a rear portion located on the central opening edge of the flexible suspension ring, and legs extended between the front and rear portions to locate in front of slots formed on the annular magnet. Therefore, the loudspeaker has reduced depth and volume, increased vibration amplitude and stability, and high quality sound output. | 02-14-2013 |
20130070954 | ELECTRODYNAMIC TRANSDUCER HAVING A DOME AND AN INNER HANGING PART - Electro-dynamic transducer ( | 03-21-2013 |
20130114846 | ELECTRODYNAMIC TRANSDUCER HAVING A DOME AND A BUOYANT HANGING PART - Electro-dynamic transducer including a main magnetic circuit defining an air gap, a moving part comprising a dome shaped diaphragm and a movable coil fixed thereto and diving into the air gap; a support to which the moving part is suspended; and a suspension linking the moving part and the support; wherein the suspension is floating with respect of the support, allowing a radial degree of freedom. | 05-09-2013 |
20130136295 | Loudspeaker Based on "The Principle of The Center Of Percussion." - A transducer of electrical oscillations to mechanical oscillations, mainly a loudspeaker having in general an elongated oscillating member attached by joints to a surrounding structure in areas of points or lines of specific dynamic balance, like one end, center of mass, center of percussion about a certain point or axis of rotation. At least one electromagnetic actuator is mounted in the area of these balancing points or lines. The use of the principle of the center of percussion is allowing for higher loudspeaker performance. | 05-30-2013 |
20130142379 | NESTED COMPOUND LOUDSPEAKER DRIVE UNIT - A loudspeaker driver ( | 06-06-2013 |
20130148841 | ACOUSTIC LOUDSPEAKER - The invention relates to an acoustic loudspeaker comprising: a magnetic field source; a mobile apparatus including a diaphragm and a winding capable of allowing passage of an electrical current representing the sound signal to be generated and of interacting with said magnetic. Said acoustic loudspeaker is characterized in that the mobile apparatus comprises a second winding, both terminals of which are connected by an essentially resistive component. | 06-13-2013 |
20130223670 | SPEAKER WITH BUILT-IN FILTER FOR DIGITAL AMPLIFIER - A speaker with a built-in filter used for a digital amplifier is provided. The speaker with the built-in filter includes an inductor wound on an outer circumferential surface of a pillar passing through a magnet. The speaker in accordance with the present invention may be directly connected to the digital amplifier without an additional low pass filter interposed therebetween, enabling a smaller and lighter digital amplifier. | 08-29-2013 |
20130266173 | LOW-PROFILE SPEAKER - A low-profile speaker that includes a low-profile frame, and a first magnet assembly disposed in the low-profile frame. The first magnet assembly has a first cage and a plurality of magnets disposed in the first cage. The low-profile speaker also includes a support assembly having a cone and a support ring attached to the cone, and a voice coil attached to the support ring. The support ring and voice coil are suspended in relatively close proximity to the magnet assembly such that the support ring and voice coil oscillate in response to electrical signals in the voice coil. | 10-10-2013 |
20130329937 | Micro-Speaker - Disclosed is a micro-speaker. A micro-speaker includes a frame, a magnetic circuit unit accommodating in the frame, a vibrating unit, an assistant coil attached to the frame and disposed below the diaphragm. The vibrating unit includes a diaphragm and a voice coil driving the diaphragm. The assistant coil includes an upper surface facing the diaphragm and an inclined surface connecting the upper surface and disposed closer to the voice coil than the upper surface. | 12-12-2013 |
20140037127 | MAGNETIC MOTOR SYSTEM - A magnetic motor system for driving a loudspeaker voice coil. The system has first and second parts that define a volume for receiving a voice coil. The first and second parts each have a respective permanent magnet with first and second sidewalls that extend in a direction away from the volume. The first sidewall slopes in a direction towards the second sidewall as the sidewalls extend away from the volume. The first and second parts further have respective guide members for channelling lines of magnetic flux in a return path between the permanent magnets. | 02-06-2014 |
20140056464 | Micro-Speaker - A micro-speaker includes a vibrating unit including a diaphragm, a voice coil, and a magnetic circuit unit supporting the diaphragm. The diaphragm includes a position portion serving as an edge of the diaphragm. The voice coil includes a pair of terminals disposed at two sides thereof. The magnetic circuit unit includes a pair of slots communicating with outside of the micro-speaker for the terminals passing through. A projection of the diaphragm along the vibration direction on the base board is within an outline of the base board. The micro-speaker has no frame or any structure with a frame configuration, which makes the magnetic circuit unit enlarge for providing improved performance. | 02-27-2014 |
20140056465 | Speaker - A speaker includes a vibrating unit, and a magnetic circuit unit. The vibrating unit includes a diaphragm, an elastic plate coupled with the diaphragm, and a voice coil electrically connecting to the elastic plate. The vibrating unit is mounted to and positioned by the magnetic circuit unit. A projection of the diaphragm on the magnetic circuit unit is disposed within an outline of the magnetic circuit unit. The speaker has no frame or any structure with a frame configuration, which makes the magnetic circuit unit larger and more powerful. | 02-27-2014 |
20140133690 | VIBRATING ELEMENT - A vibrating element includes a diaphragm and a voice coil. The diaphragm has a first surface and a second surface opposite to each other, in which the first surface includes a first conductive region and a second conductive region separated from the first conductive region. The voice coil is disposed at the first surface of the diaphragm, in which two ends of the voice coil are respectively electrically connected to the first conductive region and the second conductive region, and the two ends of the voice coil are located within a region circled by the voice coil on the first surface. | 05-15-2014 |
20140133691 | LOUDSPEAKER - A loudspeaker has a short support post joined to the forward plate; upper end of the support post in association with the fixing post is joined to the middle part of the drum paper with the fixing post; the voice coil has the upper end thereof joined to the drum paper; when the voice coil drives the drum paper to vibrate and emit sound, the upper end of the short support post sways and generates a small offset because of the lower end of the support post being retained by the forward plate such that the voice coil moves axially in the magnetic clearance without deviation, and the voice coil is incapable of touching the yoke or the forward plate to produce noise; therefore, quality of sound output from the loudspeaker is enhanced effectively. | 05-15-2014 |
20140219494 | FLAT TYPE SPEAKER COMBINING N MAGNET AND N+1 VOICE COIL PLATE - The present invention relates to a flat-type speaker, and more particularly, to a flat-type speaker having one magnet for transferring vibration into a diaphragm and two voice coil plates in one magnetic circuit, wherein the voice coil plates are coupled to both sides of the magnet. The flat-type speaker in which n magnets and n+1 voice coil plates are coupled to each other consists essentially of: the magnet positioned on a central portion; a pair of yoke plates having magnetic bodies spaced a predetermined distance apart from the magnet, such that the magnet is between the yoke plates; two voice coil plates having voice coils inserted between the magnet and one of the yoke plates and between the magnet and the other yoke plate; and a diaphragm vibrated by receiving the vibration of the voice coil plates in a state where the diaphragm contacts upper ends of the voice coil plates. | 08-07-2014 |
20140241566 | Inner Ring Magnet Type Microspeaker - An inner magnet type microspeaker including a suspension is provided which can maximize the size of a magnet. The inner magnet type microspeaker includes: a frame; a yoke installed inside of the frame and including a bottom surface and sidewalls bent upward from the bottom surface; a magnet bonded to an inside of the yoke; a voice coil located in a gap portion between the sidewalls of the yoke and the magnet; a diaphragm that vibrates by the voice coil; and a suspension where the voice coil is attached, and which guides vibrations of the diaphragm and the voice coil and includes a ring-shaped inner peripheral portion and an outer peripheral portion that surrounds the inner peripheral portion, spaced a predetermined distance apart from the inner peripheral portion, with one end and the other end being connected to the inner peripheral portion. | 08-28-2014 |
20140247960 | ELECTROMAGNETIC TRANSDUCER - An electromagnetic transducer is disclosed. The electromagnetic transducer includes a frame, a diaphragm 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, and an elastic member including a first arm attached to the diaphragm and at least a pair of second arms extending outwards from the first arm and partially attached to the frame. Each of the second arms has a first part, a stress-relieving portion connected to the first part and protruding outwards from a plane where the first part is disposed in, and a second part connected with the stress-relieving portion and the first arm. The first parts are coplanar with the second part. The stress-relieving portion could enhance the flexibility of the second arm so that the second arm is not easy to be broken. | 09-04-2014 |
20140270328 | Driving Plural Armatures with a Common Stator - An apparatus includes at least one load and a plurality of armatures, each including a permanent magnet, which are coupled to the at least one load to cause the at least one load to move. The apparatus also includes a common stator that defines an air gap within which the plurality of armatures is disposed. The common stator is configured for creating magnetic flux across the air gap for the armatures to interact with, thereby to drive motion of the at least one load. | 09-18-2014 |
20140376766 | MINIATURE MOVING-COIL SPEAKER - Disclosed is a miniature moving-coil speaker comprising a magnetic circuit system, a vibration system, and an auxiliary system for fixing the magnetic circuit system and the vibration system. The vibration system comprises a diaphragm and a voice coil integrated with the diaphragm. The auxiliary system comprises a plastic enclosure. The diaphragm is installed correspondingly at one end face of the enclosure, while the magnetic circuit system is installed at the other end face of the enclosure opposite the diaphragm; also: a flexible circuit board is arranged on the end face of the enclosure where the magnetic circuit system is installed, and the voice coil is electrically connected to the flexible circuit board. The design reduces product installation height, while at the same time facilitates wire-leading and wire-combing for the miniature moving-coil speaker, and simplifies product design. | 12-25-2014 |
20150055818 | SPEAKER STRUCTURE - A speaker structure includes a main body, a circuit board and a magnetic component. The main body has a receiving section and a recess formed on an outer circumference of the receiving section. A center of the main body is formed with a hole in communication with the receiving section. The circuit board has a board body and an outer frame body inlaid in the recess of the main body. The magnetic component is received in the hole. A voice coil collar is disposed around the magnetic component. Multiple windings are wound around a surface of the voice coil collar. Two ends of the windings are attached to the circuit board. According to the above arrangement, the volume of the speaker structure is greatly reduced and the manufacturing cost of the speaker structure is lowered. | 02-26-2015 |
20150110335 | Integrated Speaker Assembly - An open modular speaker assembly is configured to be inserted into a mobile wireless device and includes a frame, a magnetic assembly that is disposed within the frame and a membrane assembly disposed within the frame and in proximity to the magnetic assembly. Actuation of the magnetic assembly by an electric current causes a movement of the magnetic assembly causing a resultant movement of the membrane assembly. A first portion of the mobile wireless device and the membrane assembly form a front volume where the resultant movement of the membrane assembly produces sound in the front volume, and such that a second portion of the mobile wireless device and the membrane assembly form a back volume that is separated from the front volume by the membrane assembly. Air is displaced or exchanged between the front volume and the back volume. | 04-23-2015 |
20150146912 | MOVING-COIL ELECTROACOUSTIC TRANSDUCER - The present invention discloses a moving-coil electroacoustic transducer, which is bar-shaped, and comprises a vibration system. The vibration system comprises a vibration diaphragm, a bar-shaped acoustic coil, an acoustic coil support, and two plucked members. The acoustic coil sleeves the acoustic coil support and is combined with the vibration diaphragm through the acoustic coil support. The acoustic coil support is integrally thrilled, and comprises an acoustic coil mounting portion located in the middle, plucked member mounting portions located at the two ends, and a support portion disposed between two long-axis edges of the acoustic coil mounting portion. In such a design, by using the integrally formed acoustic coil support, and disposing the plucked member mounting portions at the two ends of the acoustic coil support, a support portion is disposed between two long-axis edges of the acoustic coil mounting portion, and the acoustic coil support can be formed integrally, so that the problems of biased vibration and deformation on the long-axis side is solved, and meanwhile the manufacturing process is simplified, thereby making the manufacturing simpler. | 05-28-2015 |
20150304778 | Loudspeaker Transducer with Flexible Coupler Between Cone and Voice Coil - A loudspeaker transducer includes a voice coil former and a trough member attached to the voice coil former, where the trough member includes a flexible adhesive material therein. A cone is received within the trough member and secured therein by the flexible adhesive material to provide a flexible coupling between the voice coil former and the cone. In other embodiments, the cone may be received by a flexible insert member or secured between flexible disks to provide a flexible coupling of the cone and voice coil former. | 10-22-2015 |
20150365767 | VOICE COIL AND MICRO-SPEAKER USING SAME - A voice coil and a micro-speaker using the same are disclosed in present disclosure. The voice coil includes a base body vibrating in a vibration direction; a pair of lead wires associated with the base body, each of the lead wires including a first connecting portion, a second connecting portion and a connecting coil connected between the first and second connecting portions, the connecting coil formed in a helix structure with an axis thereof parallel to the vibrating direction. | 12-17-2015 |
20150373458 | MOVING COIL DRIVE UNIT AND AUDIO DRIVERS INCORPORATING THE SAME - A moving coil drive unit for exciting a resonant member into a vibrational state is disclosed. The moving coil drive unit comprises a magnet assembly and a coil assembly comprising a voice coil arranged concentrically with the magnet assembly and configured such that the voice coil is moveable axially relative to the magnet assembly in use. The magnet assembly comprises a permanent magnet and one or more pole pieces. The magnet assembly is configured to provide an annular magnetic gap, the voice coil being suspended therein. The pole piece is configured to have a laminated structure comprising at least two spaced layers. One or more of the layers of the pole piece may be shaped, in at least a region thereof surrounding the magnetic gap, so as to generally follow and guide the magnetic field lines emanating from the permanent magnet. | 12-24-2015 |
20150373459 | ACOUSTIC TRANSDUCER - This invention relates to acoustic drivers with stationary and moving coils. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces audible sound. The time varying signals correspond to an input audio signal such that the sound corresponds to the input audio signal. Some of the described embodiments include multiple moving coils, multiple stationary coils or both. Some embodiments include feedback for adjusting one or more of the signals based on a characteristic of the acoustic driver. Various compensation and other features of the invention are also described in relation to various embodiments. | 12-24-2015 |
20160029128 | Sound Producing System - Breakup of an electro-acoustic transducer is disrupted by introducing discontinuities that do not conform to a configuration having n-fold radial symmetry. This may be accomplished by using irregular azimuthal spacing and/or by having a junction point of the discontinuities offset relative to the geometric center of the moving surface. The discontinuities may be implemented on one or more of the moving sound producing components, such as on a diaphragm and/or dust cap of the electro-acoustic transducer. A bridging member may be introduced to span the discontinuities to stiffen the sound producing components. | 01-28-2016 |
20160094916 | Vibration Unit for Acoustic Module - A vibration unit includes an encircling frame defining a vibration cavity therewithin, a vibration member disposed in the vibration cavity, and a suspension including an elastic diaphragm having a periodical wave-shape extended between the vibration member and the encircling frame to support the vibration member within the vibration cavity. The wave-shape diaphragm provides a 3-dimensional connection between the vibration member and the encircling frame to self-generate a repelling force to against a lateral movement of the vibration member so as to ensure the vibration member to be reciprocatingly moved in a linear direction. | 03-31-2016 |
20160134971 | DIAPHRAGM FOR LOUDSPEAKER, LOUDSPEAKER, ELECTRONIC APPARATUS, AND MOBILE APPARATUS - A diaphragm for loudspeaker contains resin and single-crystal diamond powder dispersed in the resin. | 05-12-2016 |
20160157019 | HEARING AID COMPATIBLE MOBILE SPEAKER | 06-02-2016 |
20160198263 | Electromagnetic Speaker | 07-07-2016 |
20160381463 | Speaker - A speaker includes a vibration system including a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm; a magnetic circuit system including a first magnet group, a second magnet group and a third magnet group, lined up in turn along the vibration direction of the vibration system; and a housing for accommodating the vibrational system and the magnetic circuit system. The first magnet group includes a first magnet and the second magnet with opposite magnetic poles thereof faced each other. The second magnet group includes a third magnet and a fourth magnet with N-pole of the third magnet close to S-pole of the fourth magnet. The third magnet group includes a fifth magnet and a sixth magnet with opposite magnetic poles thereof faced each other. | 12-29-2016 |
20160381481 | Speaker - A speaker is disclosed in the present disclosure. The speaker includes a vibration system including a vibrating diaphragm and a flat voice coil for driving the vibrating diaphragm; a magnetic circuit system including two separated permanent magnets with opposite magnetic poles thereof facing each other; a magnetic gap formed between the permanent magnets for partially receiving the flat voice coil; and a housing for accommodating the vibrational system and the magnetic circuit system. Magnetic conductive plates are attached to external surfaces of the permanent magnets. The housing includes a through-hole with a shape matched with the magnetic conductive plates, a wall of the housing has support steps located in the through-hole, and the magnetic conductive plates are placed in the through-hole and are fixed on the support steps. | 12-29-2016 |