Movable Voice Coil Patents (Class 381/400)
  • Patent number: 10382874
    Abstract: The present invention provides methods and systems for a motor assembly that includes a pole piece, at least one magnet, a first magnetizing ring, and an air gap between the pole piece and the first magnetizing ring.
    Type: Grant
    Filed: May 18, 2016
    Date of Patent: August 13, 2019
    Inventor: Jacob Aaron Fuller
  • Patent number: 10349180
    Abstract: A shallow speaker and a method of manufacture for the shallow speaker. The method of assembly uses two different alignment jigs at two different stages of the assembly to ensure alignment of the speaker components. During manufacture, a subassembly of components is created in the speaker frame, and then removed along with the first alignment jig. A second alignment jig is then placed in the speaker, and the bobbin and voice coil added. The subassembly is then connected to the frame, and the voice coil connected to the external connection terminal. Finally, the cone and dust cap are installed.
    Type: Grant
    Filed: January 3, 2017
    Date of Patent: July 9, 2019
    Assignee: Sound Sources Technology, Inc.
    Inventors: Yoichiro Sumitani, Ching-Huang Cheng, Chih-Huang Hsiao
  • Patent number: 10284959
    Abstract: A loudspeaker includes a frame; a vibration system having a membrane, a voice coil for driving the membrane to vibrate, and an elastic support piece opposite to the membrane for elastically supporting the voice coil; a magnetic circuit system. The elastic support piece includes a diaphragm and a flexible circuit board fixedly connected to the diaphragm. The diaphragm includes a first connecting part, a second connecting part and a first folding ring part connecting the first connecting part and the second connecting part. The membrane includes a second folding ring part corresponding to the first folding ring part. The first folding ring part is a convex structure bulging toward the membrane, the second folding ring part is a concave structure sinking toward the diaphragm; the diaphragm and the voice coil transmit electrical signals with the external circuits through the flexible circuit board.
    Type: Grant
    Filed: November 17, 2017
    Date of Patent: May 7, 2019
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Bo Xiao, Ronglin Linghu
  • Patent number: 10225664
    Abstract: Disclosed is an electrical-acoustic transformation device, including: a vibration system and a magnetic circuit system with a magnetic gap; wherein the vibration system includes: a diaphragm, a voice coil provided below the diaphragm and suspending in the magnetic gap, and a piezoelectric plate provided on one side of the diaphragm; and conductive lines are formed on the diaphragm, the conductive lines include a first conductive line connected to the piezoelectric plate to input an externally input first audio signal to the piezoelectric plate via the first conductive line. The electrical-acoustic transformation device in the present invention has a moving coil sound generating structure and a piezoelectric sound generating structure. The piezoelectric plate compensates the high-frequency response of the vibration system, realizing an electrical-acoustic transformation device with good performance and super wideband.
    Type: Grant
    Filed: December 17, 2015
    Date of Patent: March 5, 2019
    Assignee: GOERTEK, INC.
    Inventors: Lianwen Shan, Xinfeng Yang, Hairong Wang, Longhao Cui
  • Patent number: 10111006
    Abstract: The present disclosure provides a speaker, including a frame, a vibrating system and a magnet portion accommodated in the frame, the vibrating system includes a diaphragm and a voice coil which drives the diaphragm to vibrate, the diaphragm includes a first suspension at a central position of the diaphragm, a second suspension at an edge position of the diaphragm and a dome connected between the first suspension and the second suspension, an inner periphery of the first suspension is fixed on the magnet portion, an outer periphery of the first suspension is connected with the dome, an inner periphery of the second suspension is connected with the dome, an outer periphery of the second suspension is fixed on the frame, a stiffness of the first suspension is different from a stiffness of the second suspension. Comparing with the related art, the speaker of the present disclosure guarantees sounding effect.
    Type: Grant
    Filed: January 26, 2017
    Date of Patent: October 23, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Lubin Mao, Shun Guo
  • Patent number: 10104475
    Abstract: A magnetic circuit includes: a magnet including a first and a second surface; a top plate disposed on the first surface; a bottom plate coupled magnetically with the second surface; and a yoke coupled magnetically with the bottom plate and disposed so as to protrude from the bottom plate along a first direction. The second surface is parallel to the first surface. The first and the second surfaces are magnetized. The yoke includes a magnetic pole face that opposes the top plate. In a portion where the magnetic pole face is formed, of the yoke, a magnetic saturation part is disposed to generate magnetic saturation. The magnetic saturation part has a shape in which an area of a cross section perpendicular to the first direction decreases with nearness to a tip of the yoke along the first direction.
    Type: Grant
    Filed: April 25, 2017
    Date of Patent: October 16, 2018
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Yuuki Izumi, Satoshi Koura, Tomonori Shibuya
  • Patent number: 10080081
    Abstract: A multifunctional speaker includes a frame with an accommodation space; a magnetic circuit system suspended in the accommodation space by the spring plate; a spring plate connected with the frame, one end of the spring plate being fixed at the frame, the other end of the spring plate being fixed at the side wall; and a annular rear cover attached to an end of the frame. The magnetic circuit system includes a magnetic bowl and a magnetic body supported by the magnetic bowl. The magnetic bowl includes a baseplate fixedly connected with the magnetic body and a side wall formed by bending from an edge of the baseplate. A gap is formed between the periphery of the baseplate and the annular rear cover, and the gap has a width between 0.05 and 0.20 mm.
    Type: Grant
    Filed: November 27, 2017
    Date of Patent: September 18, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventor: Guqing Zhang
  • Patent number: 10003887
    Abstract: A miniature sound generator is disclosed. The miniature sound generator includes a vibration system including a diaphragm and a voice coil arranged below the diaphragm for driving the diaphragm to generate sound, the voice coil having a pair of long axis edges and a pair of short axis edges; a fixing system; and a flexible circuit board elastically supporting the voice coil. The flexible circuit board includes a first fixing part connected with the fixing system, a second fixing part connected to the voice coil, and a plurality of elastic connecting pieces connecting the first fixing part to the second fixing part. The elastic connecting pieces are connected with the long axis edges of the voice coil, and the voice coil is electrically connected with the elastic connecting pieces.
    Type: Grant
    Filed: December 19, 2016
    Date of Patent: June 19, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Ronglin Linghu, Bo Xiao
  • Patent number: 9998833
    Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, a magnetic system received in the shell, and a vibrating system. The vibrating system includes a membrane and a coil assembly connecting to the membrane for driving the membrane to vibrate. The magnetic system is arranged at two opposite sides of the coil assembly; and the coil assembly is arranged perpendicular to the membrane. The coil assembly includes a coil and a coil support for supporting the coil, the coil support includes a main body and a first extending part extending from an edge of the main body, the coil is supported and fixed to the main body, and the first extending part is connected to the membrane.
    Type: Grant
    Filed: March 14, 2016
    Date of Patent: June 12, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Hongxing Wang, Chengxia Ji
  • Patent number: 9985508
    Abstract: A vibrating motor is provided in the present disclosure. The vibrating motor includes a shell providing an accommodating space, a vibrating system accommodated in the accommodating space, and a flexible circuit board. The vibrating system includes a coil assembly, and the flexible circuit board includes a fixing part fixed to the shell, a connecting part connected to the coil assembly, and a flexible connecting arm connected between the fixing part and the connecting part.
    Type: Grant
    Filed: March 5, 2016
    Date of Patent: May 29, 2018
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Lubin Mao, Hongxing Wang
  • Patent number: 9942662
    Abstract: An electro-acoustic driver includes a diaphragm formed of a compliant material, a bobbin configured to hold a winding of an electrical conductor and a housing having a housing axis that is substantially coaxial with the bobbin. The diaphragm is fixed to one end of the housing and has a substantially planar shape when the diaphragm is at rest. A stiffening element is fixed to an inner region of a surface of the diaphragm. A motion of the bobbin along a bobbin axis generates a movement of the inner region of the diaphragm to thereby generate an acoustic signal that propagates from the diaphragm.
    Type: Grant
    Filed: June 14, 2016
    Date of Patent: April 10, 2018
    Assignee: BOSE CORPORATION
    Inventors: Adam Sears, Christopher A. Pare, Brock Jacobites, Andrew D. Munro, Thomas Landemaine, Nicholas John Joseph, Marek Kawka, Prateek Nath
  • Patent number: 9936299
    Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.
    Type: Grant
    Filed: January 22, 2016
    Date of Patent: April 3, 2018
    Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu Tarsasag
    Inventor: John B. French
  • Patent number: 9838792
    Abstract: The present invention discloses a vibration system of a loudspeaker, comprising a diaphragm and a voice coil attached to one side of the diaphragm, wherein the diaphragm comprises at least two layers of polyether-ether-ketone base films, and furthermore, the diaphragm comprises at least one layer of crystallized polyether-ether-ketone base film and at least one layer of non-crystallized polyether-ether-ketone base film. The diaphragm made of both crystallized and non-crystallized polyether-ether-ketone base films can have both an effectively improved acoustic performance and a lowered resonance frequency f0, thus, the acoustic effect of the loudspeaker can be improved.
    Type: Grant
    Filed: April 28, 2014
    Date of Patent: December 5, 2017
    Assignee: GOERTEK INC.
    Inventors: Xuelu Liu, Xinfeng Yang
  • Patent number: 9820052
    Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, a magnetic system and a vibrating system received in the shell. The magnetic system includes a first magnet module and a second magnet module opposite to each other for forming a magnetic gap. The vibrating system includes a membrane module and a coil assembly for driving the membrane module to vibrate. The coil assembly includes a coil arranged in the magnetic gap and a coil support for supporting the coil; at least one of the first magnet module and the second magnet module includes a soft magnet unit, the soft magnet unit is arranged adjacent to the magnetic gap and faces the coil.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: November 14, 2017
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Lubin Mao, Cheng Zhou, Hongxing Wang
  • Patent number: 9813819
    Abstract: A speaker is provided in the present disclosure. The speaker includes a membrane, a voice coil connected to the membrane, and a vibration part attached on the membrane. The membrane includes a main body and a periphery portion surrounding the main body. One of the vibration part and the main body includes a protrusion protruding away from the voice coil, and the other one of the vibration part and the main body includes a recess portion recessed towards the voice coil and corresponding to the protrusion.
    Type: Grant
    Filed: March 24, 2016
    Date of Patent: November 7, 2017
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Rui Zhang, Long Zhang
  • Patent number: 9774934
    Abstract: Low-profile electronic component apparatus and methods of manufacturing and utilizing the same, for use with low-profile mobile devices and other applications. In one embodiment, the mobile device comprises a wireless-enabled smartphone, tablet, or laptop computer, and the component comprises an audio speaker which is recessed into a metallic support element, the latter recessed into the mobile device outer housing. The support element is coated with an insulating material, and conductive traces formed thereon for electrical interface with the contacts of the speaker. When assembled, the installation results in a substantially reduced overall vertical profile, thereby both potentially reducing the overall required thickness of the host device, and creating additional volume within the device housing (such as for other components, and/or enhanced audio response of the speaker) resulting in an additional spacing between the speaker component and any extant antenna assemblies.
    Type: Grant
    Filed: March 23, 2016
    Date of Patent: September 26, 2017
    Assignee: Pulse Finland OY
    Inventor: Kimmo Antila
  • Patent number: 9774956
    Abstract: A speaker is provided in the present disclosure. The speaker includes a shell, a magnetic system received in the shell for forming a magnetic gap, and a vibrating system. The vibrating system includes a membrane, a coil assembly for driving the membrane to vibrate. The coil assembly includes a coil arranged in the magnetic gap and a coil support for supporting the coil; the coil includes at least one lead wire. The vibrating system further includes a supporting assembly and a conductive module arranged on the supporting assembly, the coil support is connected between the membrane and the supporting assembly, and the at least one lead wire of the coil is connected to the conductive module on the supporting assembly.
    Type: Grant
    Filed: March 4, 2016
    Date of Patent: September 26, 2017
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Lubin Mao, Hongxing Wang
  • Patent number: 9743193
    Abstract: A self-cooling loudspeaker including a frame, a diaphragm portion connected to the frame via a surround, an elastic member connected to the frame, a voice coil connected to the diaphragm portion, a magnet assembly connected to the frame, and first and second airflow control members disposed therein for regulating flows generated by the loudspeaker during sound reproduction, where the first and second airflow control members regulate the amount of cool air flowing into the loudspeaker and hot air flowing out.
    Type: Grant
    Filed: October 1, 2015
    Date of Patent: August 22, 2017
    Assignee: TYMPHANY HONG KONG LTD.
    Inventor: Jorge Alejandro López Castillo
  • Patent number: 9693147
    Abstract: A sensory signal output apparatus, and more particularly to a sensory signal output apparatus includes a bone conduction output apparatus, the sensory signal output apparatus including: the magnetic circuit part 110; the coil part 120; and the case 101 in which the magnetic circuit part and the coil part are accommodated, wherein the sensory signal output apparatus generates a sound or vibration while vibrating, by the magnetic circuit part, depending on a direction of an alternating signal applied to the coil part. The case elastically supports the magnetic circuit part and the coil part so that the magnetic circuit part and the coil part are operated to repeal or attract each other, or in a state where one of the magnetic circuit part and the coil part is fixed, the other vibrates while performing a repulsion or attraction motion.
    Type: Grant
    Filed: January 23, 2014
    Date of Patent: June 27, 2017
    Assignee: YEIL ELECTRONICS CO., LTD.
    Inventor: Yoon Kyu Kang
  • Patent number: 9532145
    Abstract: 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.
    Type: Grant
    Filed: December 23, 2011
    Date of Patent: December 27, 2016
    Assignee: EAGLE ACOUSTICS MANUFACTURING, LLC
    Inventor: Paul Niedermann
  • Patent number: 9452463
    Abstract: A method is provided for making a synthetic jet ejector.
    Type: Grant
    Filed: May 30, 2014
    Date of Patent: September 27, 2016
    Assignee: Nuventix, Inc.
    Inventors: Daniel N. Grimm, Stephen P. Darbin, Andrew Poynot
  • Patent number: 9369806
    Abstract: A moving-coil electroacoustic transducer is provided which is bar-shaped and includes a vibration system. The vibration system includes 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 formed; and includes an acoustic coil mounting portion located in the middle, dampening member mounting portions located at the two ends, and a support portion disposed between two long-axis edges of the acoustic coil mounting portion.
    Type: Grant
    Filed: December 26, 2011
    Date of Patent: June 14, 2016
    Assignee: Goertek, Inc.
    Inventors: Jianjian Wang, Ze Wang, Chengfei Zhang, Lianshan Ge, Chunfa Liu
  • Patent number: 9307327
    Abstract: Disclosed is a portable electroacoustic device. The device includes a shell having a receiving space; a fixing part received in the receiving part and connected with the shell, and a vibrating unit positioned in the receiving space. The vibrating unit includes a vibrating system and a magnetic circuit system fixed with the fixing part for driving the vibrating system. The magnetic circuit system has a magnetic gap. The vibrating system includes a vibrating plate for driving an external medium to generate resonate, and a voice coil inserted in the magnetic gap for driving the vibrating plate. The shell includes a lower plate having a through hole, the vibrating plate connects with the lower plate and is accommodated in the through hole.
    Type: Grant
    Filed: April 15, 2014
    Date of Patent: April 5, 2016
    Assignee: AAC Technologies Pte. Ltd.
    Inventors: Yun Tang, Rongguan Zhou
  • Patent number: 9282410
    Abstract: An electro-dynamic loudspeaker transducer's motor structure includes a magnetic circuit having a pole with minimal reluctance that allows the use of larger magnets and thicker front plates, thus generating higher flux density in the voice coil gap. The lower reluctance is achieved by increasing the pole piece's outside diameter at all points outside of the voice coil gap and the area swept out by the voice coil at maximal inward excursion. Increasing the pole's diameter over a substantial amount of the pole's distally projecting length (but not extending into the magnetic gap), provides an increased cross sectional area and a reduced magnetic circuit reluctance.
    Type: Grant
    Filed: July 22, 2014
    Date of Patent: March 8, 2016
    Inventors: Timothy A. Gladwin, Jason B. Cochrane, David D. Logan
  • Patent number: 9247350
    Abstract: Driver for an acoustic transducer having a moving coil of substantially equal length to the air gap. The air gap may itself be extended in length using an upper or lower lip, or both. A stationary coil is also provided. The moving and stationary coils can be controlled by suitable control blocks to form an electromagnet-based transducer with reduced distortion.
    Type: Grant
    Filed: February 7, 2013
    Date of Patent: January 26, 2016
    Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu Tarsasag
    Inventor: John B. French
  • Patent number: 9241213
    Abstract: This invention relates to acoustic transducers with stationary and moving coils, and methods for operating the acoustic transducers. Time varying signals are applied to the moving and stationary coils to control the movement of a diaphragm, which produces sound. The time varying signal applied to the moving coil corresponds to at least a processed version of an input audio signal and is updated based on, at least, a version of the time varying signal applied to the stationary coil. Some embodiments include updating the processed version of the input audio signal in response to a magnetic flux value corresponding to the time-varying signal applied to the stationary coil. Some embodiments include updating the time-varying signal applied to the moving coil in response to a feedback signal.
    Type: Grant
    Filed: September 25, 2014
    Date of Patent: January 19, 2016
    Assignee: Harman Becker Gepkocsirendszer Gyarto Korlatolt Felelossegu Tarsasag
    Inventors: John B. French, David Russell
  • Patent number: 9210512
    Abstract: The present invention relates to a flat-type speaker, and more specifically, to a flat-type speaker in which a plurality of magnetic circuits are horizontally connected in serial or in parallel such that one speaker is formed.
    Type: Grant
    Filed: June 8, 2012
    Date of Patent: December 8, 2015
    Assignee: EXELWAY, INC.
    Inventor: Dong-Man Kim
  • Patent number: 9094750
    Abstract: A loudspeaker includes: a frame; a yoke fixed to the frame; a magnet fixed to the yoke; a plate fixed to an upper surface of the magnet which is opposite to a surface of the magnet which is fixed to the yoke; a vibratable voice coil arranged in a first magnetic gap formed between the yoke and the plate; a diaphragm having an outer-edge portion joined to the voice coil; and a support member supporting the diaphragm in a vibratable manner, and composed of edges, one end of each edge being fixed to the frame. The plate is composed of: a flat-plate part fixed to the upper surface of the magnet, and having, at an upper surface thereof, a planar portion extending from the outer-edge portion up to a predetermined distance; and a protruding part disposed on the flat-plate part excluding the planar portion, and protruding toward the diaphragm.
    Type: Grant
    Filed: January 30, 2013
    Date of Patent: July 28, 2015
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Akiko Fujise, Shuji Saiki, Sawako Kano, Toshiyuki Matsumura, Atsushi Sakaguchi
  • Publication number: 20150146912
    Abstract: 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.
    Type: Application
    Filed: December 26, 2011
    Publication date: May 28, 2015
    Inventors: Jianjian Wang, Ze Wang, Chengfei Zhang, Lianshan Ge, Chunfa Liu
  • Patent number: 9042594
    Abstract: Electro-dynamic transducer (1) including: a main magnetic circuit (2) defining an air gap (15), a moving part (16) comprising a dome shaped diaphragm (17) fixed to a movable coil (18) diving into the air gap (15); a support (20) to which the moving part (16) is suspended; a suspension (26) linking the moving part (16) and the support (20); wherein the support (20) at least partly extends in an inner volume inside the moving part (16), wherein the suspension (26) is fixed, by an outer periphery, to an inner face of the moving part (16), and wherein the suspension (26) is made of an acoustically non emitting material.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: May 26, 2015
    Assignee: PHL AUDIO
    Inventors: Yoann Flavignard, Philippe Lesage
  • Patent number: 9031254
    Abstract: A headphone or a headset having at least a first and a second earphone unit is provided, the first and second earphone units being interconnected via a connecting band, the connecting band having a first end configured to connect to the first earphone unit and a second end configured to connect to the second earphone unit, wherein at least the first earphone unit comprises a first transceiver, and at least the first end of the connecting band comprises a second transceiver, the first and second transceivers being configured to inductively connect, thereby connecting the first earphone unit to conducting elements in the connecting band. It is an advantage of using an inductive connection between the earphone unit and the connecting band that no wires need to be transferred from the earphone unit to the connecting band. Hereby, a 360 degree rotation of the joint may be obtained.
    Type: Grant
    Filed: June 20, 2012
    Date of Patent: May 12, 2015
    Assignee: GN Netcom A/S
    Inventor: Stefan Heise
  • Publication number: 20150110335
    Abstract: 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.
    Type: Application
    Filed: October 6, 2014
    Publication date: April 23, 2015
    Inventors: Vladimir Telemaque, Michael Schoffmann
  • Patent number: 9014413
    Abstract: A dual coil loudspeaker system having a voice coil having a first coil configured to receive a first electrical signal from a first source, and a second coil configured to receive a second electrical signal from a second source different from the first source; a field magnet configured to generate a magnetic field that interacts with magnetic fields created by the first coil and the second coil; and a diaphragm connected to the voice coil such that the diaphragm is displaced in response to energization of at least one of the first coil and the second coil.
    Type: Grant
    Filed: August 21, 2013
    Date of Patent: April 21, 2015
    Assignee: The Boeing Company
    Inventor: Kwun-Wing W. Cheung
  • Patent number: 8995703
    Abstract: 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.
    Type: Grant
    Filed: April 5, 2012
    Date of Patent: March 31, 2015
    Assignee: PSS Belgium N.V.
    Inventor: Onur Ilkorur
  • Patent number: 8989429
    Abstract: 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.
    Type: Grant
    Filed: January 14, 2011
    Date of Patent: March 24, 2015
    Assignee: PHL Audio
    Inventors: Yoann Flavignard, Philippe Lesage
  • Patent number: 8971564
    Abstract: The invention relates to a voice coil support (21) for a coil transducer motor structure (10) having a first surface (26) towards one end and a second surface (22) towards the other end along an axis of displacement Z, the voice coil support being adapted to receive at least one coil (22H, 22L) wound therearound an outer surface (27) arranged in use for displacing the voice coil support (21) along its axis of displacement Z, as a current is driven through the coils (22H, 22L) when the voice coil support (21) is placed in a magnetic field, characterized in that the voice coil support (21) comprises a material adapted to prevent airflow communication between at least the first surface (26) and the second surface (22).
    Type: Grant
    Filed: July 2, 2009
    Date of Patent: March 3, 2015
    Assignees: Renault S.A.S., Universite du Maine
    Inventors: Guy Lemarquand, Mathias Remy, Gaël Guyader
  • Publication number: 20150055818
    Abstract: 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.
    Type: Application
    Filed: August 22, 2013
    Publication date: February 26, 2015
    Applicant: ASIA VITAL COMPONENTS CO., LTD.
    Inventors: Mao-Lin Chen, Chih-Chiang Chao
  • Patent number: 8958596
    Abstract: A vibration system is disclosed. The vibration system includes a diaphragm and a voice coil that drives the diaphragm to vibrate. The diaphragm includes a fixing part for fixing the voice coil, and a heat sink is disposed on and fixed to the fixing part. A speaker using the vibration system is also disclosed. By disposing the heat sink on the diaphragm, heat can be dissipated from the voice coil effectively to ensure stability of the speaker.
    Type: Grant
    Filed: March 18, 2014
    Date of Patent: February 17, 2015
    Assignee: AAC Technologies Pte. Ltd.
    Inventor: Zhuming Chu
  • Patent number: 8958597
    Abstract: A magnet-less electromagnetic voice coil actuator comprises a pot core magnet structure having a magnetic flux conductive core, a field coil within the pot core magnet structure for generating magnetic field through the magnetic flux conductive core and across an air gap, a voice coil wound on a voice coil former forming an under-hung voice coil design within the air gap and an electronic signal processor configured to split an audio input signal into a positive definite field coil signal and a bipolar voice coil signal. The voice coil and the field coil are each driven by an amplified signal derived from the audio input signal to create an actuation force. The bipolar voice coil signal is adjusted so that the product of the bandwidth limited positive definite field coil current and the bipolar voice coil current, hence the actuation force, is a linear function of the bipolar audio input current.
    Type: Grant
    Filed: March 23, 2013
    Date of Patent: February 17, 2015
    Assignee: Coleridge Design Associates LLC
    Inventor: Geoffrey A. Boyd
  • Patent number: 8948441
    Abstract: A planar speaker system may include a bottom frame having a cavity. Within this cavity a plurality of magnets may be arranged to form a substantially circular pattern. A diaphragm that includes a plurality of electrically conductive traces may be connected to the bottom frame and extend across the cavity of the bottom frame. When alternating current flows through the electrically conductive traces, the diaphragm may vibrate in response to the interaction between the current flowing in the electrically conductive traces and the magnetic field, thereby producing sound. The planar speaker system may include a top frame having a cavity, and a second set of magnets may be disposed in the cavity of the top frame.
    Type: Grant
    Filed: March 14, 2012
    Date of Patent: February 3, 2015
    Assignee: Harman International Industries, Inc.
    Inventor: Zhijun Zhao
  • Patent number: 8934658
    Abstract: A coil includes a first section, a second section spaced from the first section, a third section and a forth section connecting ends of the first and second sections for forming a closed loop. The third section includes a first portion directly contacting to the first section, and a second portion extending from the first portion and directly connecting to the second section, the first portion forms a protrusion away from the fourth section.
    Type: Grant
    Filed: April 8, 2013
    Date of Patent: January 13, 2015
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., AAC Microtech (Changzhou) Co., Ltd.
    Inventor: Jing He
  • Publication number: 20150003663
    Abstract: A miniature loudspeaker may include a driver module with a flexible carrier having a proximal portion arranged within the perimeter of the frame and a distal portion arranged outside the perimeter of the frame, the flexible carrier carrying an output amplifier. The flexible carrier may be provided with electrically conductive traces connecting an amplifier input with input contact pads placed on the distal portion. The flexible carrier may be provided with electrically conductive traces connecting an amplifier output with output contact pads placed at the proximal portion. The output amplifier may be arranged on the proximal portion of the flexible carrier within the perimeter of the frame. The proximal portion of the flexible carrier may be rigidly attached to the static part. The output contact pads may be connected with the voice coil through flexible lead wires.
    Type: Application
    Filed: June 26, 2013
    Publication date: January 1, 2015
    Applicant: ANALOG DEVICES A/S
    Inventors: Henrik Lerche Biessy, Lars Lindemose, Jan Naaby
  • Publication number: 20140376766
    Abstract: 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.
    Type: Application
    Filed: February 20, 2012
    Publication date: December 25, 2014
    Inventors: Gang Chen, Minghui Shao, Qing Miao, Chao Xu, Zongjun Mou
  • Patent number: 8909162
    Abstract: In accordance with an embodiment, a system has an audio amplifier configured to be coupled to a speaker coil port via a parallel resonant circuit, and a radio frequency (RF) amplifier configured to transmit a RF signal at a first RF transmission frequency. The speaker coil port is configured to be coupled to a speaker coil, and the parallel resonant circuit has a resonance frequency of about the first RF transmission frequency.
    Type: Grant
    Filed: September 7, 2012
    Date of Patent: December 9, 2014
    Assignee: Infineon Technologies AG
    Inventors: Nikolay Ilkov, Winfried Bakalski
  • Patent number: 8892174
    Abstract: A loudspeaker comprises a voice coil and a diaphragm attached to the voice coil. The diaphragm has a generally rectangular outer shape, and comprises an outer rim (A1) having an outer edge at which the diaphragm is fixed in position and an inner section (A0) within the outer rim. The inner section (A0) comprises: an outermost area (A00) which is coupled to the voice coil and having the same generally rectangular outer shape; and an inner area (A01) comprising a periodic rib structure (A01p), with the ribs running parallel to the shorter side of the rectangular outer shape, and two lateral transition areas (A01c) between the edges of the periodic rib structure (A01p) and the shorter side edges of outermost area (A00).
    Type: Grant
    Filed: November 23, 2011
    Date of Patent: November 18, 2014
    Assignee: Knowles IPC (M) Sdn. Bhd.
    Inventors: Mathias Weber, Ewald Frasl
  • Patent number: 8879778
    Abstract: A speaker used as a household appliance is provided. The speaker has an ultra-slim structure suitable for an ultra-slim TV and is applied to a woofer speaker representing a superior low-pitched sound characteristic. The speaker has the ultra-slim structure and improves the low-pitched sound characteristic and sound pressure by increasing the amplitude. Outer appearances of a damper and a frame are changed to enlarge a diameter of a voice coil in comparison with an outer diameter of the speaker, the damper has a two-step structure such that a longitudinal amplitude of an upper side of the damper is increased to improve the low-pitched sound characteristic in a state in which a lower side of the damper is put on the frame, and a size of a vibration plate is enlarged to improve the low-pitched sound characteristic and sound pressure. A flat plate is used as the vibration plate.
    Type: Grant
    Filed: August 29, 2012
    Date of Patent: November 4, 2014
    Inventor: Kang-Moon Yeom
  • Patent number: 8873792
    Abstract: A speaker includes a base defining a pair of receiving cavities separated from each other in a longitudinal direction and an engaging portion disposed between the pair of receiving cavities, a pair of magnetic circuit systems received into the pair of the receiving cavities, a diaphragm attached on the base, a pair of voice coil members connecting with the diaphragm, and a suspension mounted on the base. The suspension defines a pair of separating portions separated from each other in a lateral direction. Each separating portion defines a fixing portion engaging with the engaging portion of the base, a pair of connecting portions extending from two ends of the fixing portion and towards the diaphragm, and a pair of supporting portions connecting with the connecting portion for engaging with the pair of voice coil members, respectively.
    Type: Grant
    Filed: July 25, 2011
    Date of Patent: October 28, 2014
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components Inc.
    Inventors: Yi Shao, Wei Song
  • Publication number: 20140270328
    Abstract: 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.
    Type: Application
    Filed: March 15, 2013
    Publication date: September 18, 2014
    Inventors: Brian M. Lucas, Johan H. Isaksson, Geoffrey C. Chick
  • Publication number: 20140254191
    Abstract: The configuration is provided with three flexible arms extending in the same circumferential direction, as a suspension for supporting the magnetic circuit unit in displaceable fashion in the vertical direction with respect to a coil support member. This assures sufficient length of each of the flexible arms, enhancing the vibration characteristics. Next, arm insertion slots having approximately the same vertical Width as the flexible arms are formed at three locations in the circumferential direction in the coil support member. The distal end of each flexible arm is then inserted into the arm insertion slot, doing so in the aforementioned same circumferential direction, causing a barb to engage an engaging part and detain the flexible arm.
    Type: Application
    Filed: May 20, 2014
    Publication date: September 11, 2014
    Applicants: STAR MICRONICS CO., LTD., KOITO MANUFACTURING CO., LTD.
    Inventors: Makoto YASUIKE, Yasunori Tsukuda, Atsushi Sugimoto, Osamu Endo, Naoki Tatara
  • Publication number: 20140247960
    Abstract: 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.
    Type: Application
    Filed: March 21, 2014
    Publication date: September 4, 2014
    Applicant: AAC ACOUSTIC TECHNOLOGIES (SHENZHEN) CO., LTD.
    Inventors: Lin Liu, Xudong Yan