Laminated Type Patents (Class 181/170)
  • Patent number: 10516945
    Abstract: The present invention relates to a high power microspeaker having a separate sub-diaphragm on a top end surface of a coil, in addition to a diaphragm and a suspension. The present invention provides a structure in which an acoustic system including a main diaphragm and a conductive suspension of a microspeaker is attached to a top end surface of a coil and a separate sub-diaphragm is attached to the same surface of the coil.
    Type: Grant
    Filed: May 10, 2018
    Date of Patent: December 24, 2019
    Assignee: EM-TECH Co., Ltd.
    Inventors: Cheon Myeong Kim, Ji Hoon Kim, Sung Chul Jung, Seul Ki Nam
  • Patent number: 10475689
    Abstract: A method for processing a holding plate (10) of a clamping device (in particular clamp wafer chuck) for holding a component, in particular a wafer, wherein the holding plate (10) has a SiC-based surface (12) on which at least one protruding, SiC-based surface element (13) is formed, includes the steps of locally limited heating of the holding plate (10) in a predetermined surface section and creating the surface element (13) at the predetermined surface section by chemical vapor deposition, in particular by means of laser CVD. Applications of the method exist in repairing a holding plate (10) of a clamping device or manufacturing a holding plate (10) of a clamping device. Furthermore, a holding plate of a clamping device for holding a component, in particular a wafer, is described.
    Type: Grant
    Filed: January 17, 2018
    Date of Patent: November 12, 2019
    Assignee: Berliner Glas KGaA Herbert Kubatz GmbH & Co.
    Inventors: Volker Schmidt, Ralf Hammer, Gregor Hasper, Mike Fischer
  • Patent number: 10469938
    Abstract: A diaphragm ported tweeter includes a ring structure having an upper portion and a lower portion, and a dome-shaped diaphragm having a periphery secured to the upper portion of the ring structure and a concentrically positioned aperture at an apex of the dome-shaped diaphragm. The diaphragm ported tweeter also includes an acoustic duct having an open first end coupled to the aperture and a second open end extending away from the aperture. The diaphragm ported tweeter is configured as a Helmholtz resonator to increase an output level over a range of frequencies.
    Type: Grant
    Filed: December 19, 2018
    Date of Patent: November 5, 2019
    Inventor: Alexander B. Ralph
  • Patent number: 10225653
    Abstract: In accordance with embodiments of the present disclosure, a device may include a piezoelectric speaker for generating sound, a microphone, and a controller communicatively coupled to the speaker and the microphone. The controller may be configured to receive a first signal from the piezoelectric speaker, the first signal induced at least in part by sound incident on the speaker other than sound generated by the piezoelectric speaker, receive a second signal from the microphone, the second signal induced by sound incident on the microphone, process at least one of the first signal and the second signal to determine at least one characteristic of sound incident upon at least one of the piezoelectric speaker and the microphone, and select at least one of the microphone and the piezoelectric speaker as a signal source for incident sound based on the at least one characteristic.
    Type: Grant
    Filed: August 11, 2017
    Date of Patent: March 5, 2019
    Assignee: Cirrus Logic, Inc.
    Inventors: John L. Melanson, Eric Swanson
  • Patent number: 10070227
    Abstract: The present invention provides a diaphragm structure of a sounding apparatus comprising: a thin-film layer; a first circuit thin-film layer fixed on a first side of the thin-film layer by means of a first electrolytic bonding layer; a second circuit thin-film layer fixed on a second side of the thin-film layer by means of a second electrolytic bonding layer; multiple holes passing through the first circuit thin-film layer, the thin-film layer and the second circuit thin-film layer; and multiple conductive layers disposed on inner circumferential walls of the holes and in contact with the first circuit thin-film layer and the second circuit thin-film layer. In the diaphragm structure provided by the present invention, instead of using back adhesives, electrolytic bonding is used to fix the circuit thin-film layers on two sides of a thin-film layer, thereby greatly reducing the thickness of the diaphragm structure.
    Type: Grant
    Filed: October 24, 2014
    Date of Patent: September 4, 2018
    Inventor: Ko-Chung Teng
  • Patent number: 10060424
    Abstract: A fluid sending apparatus includes a signal generator that generates a signal including a signal component that has a one-sided waveform and is composed of a rising component in a positive voltage direction, a falling component in the positive voltage direction, and a vortex ring formation time component T, and a damping component for driving for a predetermined time with a voltage less than or equal to one-half of a voltage in the positive voltage direction, the waveform of each of the signal component and the damping component corresponding to a single wave.
    Type: Grant
    Filed: June 20, 2011
    Date of Patent: August 28, 2018
    Assignee: MITSUBISHI ELECTRIC CORPORATION
    Inventors: Susumu Fujiwara, Naho Misumi, Shiro Takeuchi, Junichiro Hoshizaki
  • Patent number: 9866967
    Abstract: A diaphragm for a loudspeaker drive unit or for a microphone includes a rigid dome-shaped member having a thickness that varies from a first thicker thickness at a first location at the periphery of the dome-shaped member to a second thinner thickness at a second location, which is nearer to the center of the dome-shaped member. There is a step-wise change in thickness at a location between the first location and the second location. Having greater thickness at the periphery of the dome-shaped member may improve stiffness of the diaphragm and may allow for an increased break-up frequency. Having thinner material elsewhere in the dome-shaped member may allow the mass of the diaphragm to be kept low and may result in better acoustic sensitivity.
    Type: Grant
    Filed: February 14, 2017
    Date of Patent: January 9, 2018
    Assignee: B & W Group Ltd.
    Inventor: Martial André Robert Rousseau
  • Patent number: 9854364
    Abstract: A speaker may be configured with at least one diaphragm positioned proximal to and separated from an array of magnets. The diaphragm may consist of a substrate and at least one patterned electrically conductive trace with a portion of the diaphragm knurled to provide a ridge extending a height above the diaphragm that is at least twice a thickness of the diaphragm.
    Type: Grant
    Filed: November 19, 2015
    Date of Patent: December 26, 2017
    Assignee: MrSpeakers, LLC
    Inventors: Daniel W. Clark, Frederick Bruce Thigpen, Robert Jason Egger
  • Patent number: 9843857
    Abstract: A speaker box includes a housing which has a receiving space and a side wall having a sound hole, and a sound generator received in the receiving space and including a diaphragm including a dome and a periphery connected to the dome. The dome includes a near-end which is near the sounding hole and a far-end which is farther the sounding hole. A compliance of the near-end is less than a compliance of the far-end.
    Type: Grant
    Filed: December 30, 2015
    Date of Patent: December 12, 2017
    Assignee: AAC TECHNOLOGIES PTE. LTD.
    Inventors: Yunxia Xu, Bin Cai
  • Patent number: 9838800
    Abstract: A piezoelectric, poly (?-benzyl-?,L-glutamate) (“PBLG”) planar microphone, and method for construction thereof, are disclosed. The microphone includes at least a polyester film, a piezoelectric, hot pressed poly (?-benzyl-?,L-glutamate) (“HPPBLG”) layer, and an aluminum coating for the HPPBLG layer. The coated HPPBLG layer is coupled to the polyester film.
    Type: Grant
    Filed: January 23, 2015
    Date of Patent: December 5, 2017
    Assignee: The Johns Hopkins Univeristy
    Inventors: James E. West, Kailiang Ren, Michael Yu
  • Patent number: 9781515
    Abstract: A loudspeaker diaphragm includes a base layer and a coating layer. The base layer contains natural fibers. The coating layer is composed of bamboo cellulose nanofibers and is formed at least on the first side of the base layer. The coating layer has a thickness in the range of 3% to 15%, both inclusive of the sum of the thicknesses of the base layer and the coating layer.
    Type: Grant
    Filed: August 21, 2015
    Date of Patent: October 3, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Tomonori Shibuya, Yoshiyuki Takahashi, Yoshimichi Kajihara, Tetsushi Itano, Mitsukazu Kuze, Takayuki Dan
  • Patent number: 9769583
    Abstract: The present invention discloses a vibration membrane assembly for a speaker, a method for producing a vibration membrane assembly and a speaker. The assembly comprises a vibration membrane and a vibration membrane carrier ring.
    Type: Grant
    Filed: January 13, 2016
    Date of Patent: September 19, 2017
    Assignee: Sound Solutions International Co., Ltd.
    Inventors: Gary Hsieh, Christian Lembacher, Armin Timmerer, Ewald Frasl, Bernhard Seiwald, Peter Fischer
  • Patent number: 9769573
    Abstract: A transparent ultrasonic emitter includes a first transparent conductive layer; a second transparent conductive layer; and a plurality of transparent spacers disposed between the first and second transparent layers conductive of the ultrasonic audio speaker, the transparent spacers having a thickness and being arranged to define an open area between the first and second transparent layers.
    Type: Grant
    Filed: May 20, 2016
    Date of Patent: September 19, 2017
    Assignee: Turtle Beach Corporation
    Inventors: David S. Hecht, Brian Alan Kappus, Elwood Grant Norris, Mark W. Norris
  • Patent number: 9743189
    Abstract: A decoupled speaker membrane assembly for a microspeaker, the membrane including a first membrane portion, a compliant portion, a second membrane portion and a suspension member. The compliant portion is attached to, and extends radially outward from, an entire perimeter of the first membrane portion. The second membrane portion is attached to, and extends radially outward from the compliant portion such that the second membrane portion is decoupled from the first membrane portion by the compliant portion. The suspension member extends radially outward from the second membrane portion.
    Type: Grant
    Filed: January 5, 2016
    Date of Patent: August 22, 2017
    Assignee: APPLE INC.
    Inventors: Alexander V. Salvatti, Daniel K. Boothe
  • Patent number: 9693167
    Abstract: A loudspeaker includes a diaphragm, a voice coil body, and a magnetic circuit. The diaphragm has a first side, which is the surface of a recess defined by a thin part and a thick part formed around the thin part. The voice coil body includes a bobbin and a voice coil. The bobbin has a first end connected to the thin part on the first side of the diaphragm and a second end opposite to the first end. The magnetic circuit has an inner part, an outer part, and a magnetic gap. Part of the magnetic circuit including the first side of the inner part is located from the second end of the bobbin into the bobbin, and the first side of the inner part and the first side of the outer part are located in the recess so that the voice coil is located in the magnetic gap.
    Type: Grant
    Filed: July 3, 2015
    Date of Patent: June 27, 2017
    Assignee: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.
    Inventors: Kazuki Honda, Mitsukazu Kuze
  • Patent number: 9603500
    Abstract: A domestic appliance includes a housing, a base support configured to support the housing on a floor, and a communication module configured to send and/or receive data wirelessly. The communication module is disposed within the base support, with the base support being made of plastic, at least in an area adjacent to the communication module.
    Type: Grant
    Filed: January 27, 2014
    Date of Patent: March 28, 2017
    Assignee: BSH Huasgeräte GmbH
    Inventors: Reinhard Hering, Paul Nistor, Christian Wirth
  • Patent number: 9551180
    Abstract: A system for controlling noise in a fenestration assembly (e.g., a window) includes a fenestration assembly with at least one glazing and a frame. The at least one glazing has a surface. At least one sensor is coupled to the at least one glazing and is configured to generate noise detection signals. An actuator is positioned on the surface of the at least one glazing and has a plurality of regions. A controller is coupled to the sensor and the actuator and is configured to control each of the regions of the actuator to generate a different frequency based on the noise detection signals. Alternatively, each of the regions may be controlled to generate a frequency with a different phase shift based on the noise detection signals.
    Type: Grant
    Filed: June 4, 2014
    Date of Patent: January 24, 2017
    Assignee: MILGARD MANUFACTURING INCORPORATED
    Inventors: Jian Xu, Kevin D. Vilhauer
  • Patent number: 9544693
    Abstract: A device for emitting an acoustic wave includes a flared structural piece bearing at its base an electromechanical transducer and defining at its flared end an output surface. A mechano-acoustic coupler made of one piece is a solid piece and exhibits: a first portion for mounting on the transducer, a second portion extending from the first portion up to the level of the output surface, the coupler being suspended on the structural piece at the level of the second portion and the second portion having a cross-sectional area at the level of the output surface which is strictly greater than its cross-sectional area at the level of the first portion, and a third portion extending from the second portion, where the third portion has a cross-sectional area which is smaller than the output surface, the third portion including a cross-section of greater area than the output surface.
    Type: Grant
    Filed: April 13, 2012
    Date of Patent: January 10, 2017
    Assignee: NEXO
    Inventor: Francois Deffarges
  • Patent number: 9538269
    Abstract: The object of the present invention is that the surplus vibration involved therewith simultaneously generating a sound wave by the vibration of the vibrating cone of the loudspeaker unit is generated in the loudspeaker system, which has impaired the sound quality of the loudspeaker system. The purpose of the present invention is to provide a technique for improving the sound quality by reducing the this surplus vibration which are the loudspeaker frame vibration and the cabinet vibration like a front baffle vibration. The present invention is characterized in being configured with a viscoelastic material layer upon rear portions such as the frame surface of the loudspeaker unit and inside and outside surfaces of each surface configuring the loudspeaker cabinet, and additionally suppresses vibration by addition of a heavy member or pressurization caused by constraint of a binding member.
    Type: Grant
    Filed: February 22, 2012
    Date of Patent: January 3, 2017
    Inventor: Mitsuo Nagaoka
  • Patent number: 9485581
    Abstract: A manufacturing method of a diaphragm arrangement for a speaker includes the steps of mold injecting polypropylene material as a raw material to form a middle foaming layer, and sandwiching the middle foaming layer between first and second layers to form a flat speaker diaphragm. The flat speaker diaphragm is arranged to mount at an opening of a supporting frame of a speaker for receiving a vibration force generated from an electromagnetic provider in the supporting frame.
    Type: Grant
    Filed: March 27, 2015
    Date of Patent: November 1, 2016
    Inventor: Hsin Min Huang
  • Patent number: 9317063
    Abstract: A display device includes a speaker film disposed on an upper surface of a first substrate of a main body or a lower surface of a second substrate of a main body. Alternatively, a display device includes a touch screen panel including a speaker film and disposed on an upper surface of the first substrate.
    Type: Grant
    Filed: June 16, 2014
    Date of Patent: April 19, 2016
    Assignee: SAMSUNG DISPLAY CO., LTD.
    Inventors: Dae-Heon Kwon, Sung-Won Bae, Min-Jae Kim
  • Patent number: 9313567
    Abstract: In an embodiment an apparatus includes a graphical display panel and a loudspeaker. The panel has a display layer for displaying images and defines a plurality of apertures penetrating through at least the display layer. The loudspeaker includes a diaphragm arranged substantially parallel to the display layer. Sound from the loudspeaker diaphragm is directed outside a host device through the apertures. The speaker may be an electret or a piezo-electric speaker for thinness. There may be apertures on an opposed side of the host device housing to achieve a dipole pattern which is directed and gives acoustic privacy to the user, or a rear acoustic cavity for a monopole pattern which more broadly disperses the sound. One illustrated embodiment is selectable between monopole and dipole. Size and total area of the holes determines acoustic resistance and so a method is described to determine those from physical parameters of the display panel.
    Type: Grant
    Filed: November 3, 2014
    Date of Patent: April 12, 2016
    Assignee: Nokia Technologies Oy
    Inventors: Timothy J. Mellow, Leo Karkkainen, Zoran Radivojevic, Koray Ozcan
  • Patent number: 9067185
    Abstract: The present invention performs special heat treatment on a polymer film in a temperature range from (i) a lower limit to temperature rise being equal to or higher than a starting temperature of thermal decomposition of the polymer film, i.e., which is a temperature observed at an early stage of the thermal decomposition of the polymer film, to (ii) an upper limit to temperature rise being equal to or lower than an intermediate temperature of thermal decomposition of the polymer film. This reduces foaming in the film during graphitization treatment following the special heat treatment. Thus, even with a higher heating rate for graphitization, it is possible to produce a graphite film having good quality.
    Type: Grant
    Filed: March 26, 2012
    Date of Patent: June 30, 2015
    Assignee: KANEKA CORPORATION
    Inventors: Yusuke Ohta, Takashi Inada, Makoto Mishiro, Yasushi Nishikawa
  • Patent number: 8950545
    Abstract: The present disclosure provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a polyarylate film, and a thermoplastic polyurethane elastomer attached to one surface of the polyarylate film.
    Type: Grant
    Filed: August 27, 2013
    Date of Patent: February 10, 2015
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Component (Shenzhen) Co., Ltd.
    Inventors: Xing-Zhi Huang, Jing He
  • Patent number: 8942407
    Abstract: A loudspeaker radiating diaphragm can be stiffened to help increase the breakup frequency to above the working frequency range of the driver concerned, by forming it of a molded part and an attached formed part. The molded part is a radiating surface with stiffening ribs. The formed part is a thin surface of high modulus material, attached to the rear of the ribs. The overall structure can have significantly higher stiffness than either of the two parts. This helps in designing a loudspeaker driver that does not breakup within its working frequency range.
    Type: Grant
    Filed: April 26, 2011
    Date of Patent: January 27, 2015
    Assignee: GP Acoustics (UK) Limited
    Inventors: Mark Alexander Dodd, Jack Anthony Oclee-Brown, Julia Davidson
  • Patent number: 8925675
    Abstract: The present disclosure provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a polyetherimide film, and a thermoplastic polyurethance elastomer attached to one surface of the polyetherimide film.
    Type: Grant
    Filed: September 23, 2013
    Date of Patent: January 6, 2015
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., American Audio Components (Shenzhen) Co., Ltd.
    Inventors: Xing-Zhi Huang, Jing He
  • Patent number: 8646570
    Abstract: In a diaphragm of an electric sound converter which converts vibration such as sound into an electrical signal, a center dome is reinforced while suppressing variations in the sensitivity and frequency response to the minimum, whereby reduction in a high-pass reproduction limit is suppressed, and occurrence of anomalous resonance is prevented. In a diaphragm 1 of an electric sound converter having a center dome 2, a reinforcing film 7 made of the same material as that of the center dome and formed into the same shape as that of the center dome is applied to the center dome with a hot-melt adhesive 6 of the same nature as that of the center dome, a groove 7a formed in a polygonal reticulate pattern is provided on one surface of the reinforcing film adhered with the adhesive, and a convex rib 8 corresponding to the groove is formed on the other surface.
    Type: Grant
    Filed: August 3, 2012
    Date of Patent: February 11, 2014
    Assignee: Kabushiki Kaisha Audio-Technica
    Inventor: Hiroshi Akino
  • Patent number: 8340341
    Abstract: A rigid three-dimensional component such as a speaker dome is formed of diamond, preferably fabricated to net shape by CVD diamond synthesis, and includes a coating on one or more major surfaces thereof. The coating is designed to enhance the performance and/or to alter the appearance of the component. In particular, the coating is designed to act as a damping medium and/or provide aesthetic qualities to the component.
    Type: Grant
    Filed: January 12, 2006
    Date of Patent: December 25, 2012
    Assignee: Element Six Limited
    Inventors: Neil Perkins, Charles Simon James Pickles, Christopher John Howard Wort, Geoffrey Alan Scarsbrook
  • Patent number: 8320604
    Abstract: Composite loudspeaker cones that include an interstitial layer of material having a core density below 600 kg/m3 and a Young's modulus greater than 0.2 GPa, such as balsa wood, interposed between a first carbon fiber layer and a second carbon fiber layer and method of making same.
    Type: Grant
    Filed: April 23, 2008
    Date of Patent: November 27, 2012
    Inventors: Richard Vandersteen, Michael P. Latvis, Jr.
  • Patent number: 8284964
    Abstract: A compound membrane (100) for an acoustic device (200), the compound membrane (100) comprising a first layer (101) and a second layer (102), wherein a value of Young's modulus of the second layer (102) does not vary more than essentially 30% in a temperature range between essentially ?20° C. and essentially +85° C.
    Type: Grant
    Filed: October 16, 2007
    Date of Patent: October 9, 2012
    Assignee: Knowles Electronics Asia PTE. Ltd.
    Inventors: Susanne Windischberger, Josef Lutz, Ewald Frasl
  • Patent number: 8256567
    Abstract: A diaphragm is disclosed. The diaphragm includes a dome part, an edge part connected to an outer peripheral part of the dome part. The dome part includes a main body defining a first surface and a second surface opposite to the first surface, a first dome part connected to the first surface, and a second dome part connected to the second surface.
    Type: Grant
    Filed: December 26, 2010
    Date of Patent: September 4, 2012
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., AAC Technologies Pte. Ltd.
    Inventors: Lin-Zhen Li, Ji-Liang Lu, Wen-Tao Jiang
  • Patent number: 8235168
    Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: August 7, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshimichi Kajihara, Shinya Mizone, Kazuyoshi Mimura, Takashi Sabato, Kazuaki Nishimura
  • Patent number: 8230966
    Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: July 31, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshimichi Kajihara, Shinya Mizone, Kazuyoshi Mimura, Takashi Sabato, Kazuaki Nishimura
  • Patent number: 8177021
    Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.
    Type: Grant
    Filed: January 18, 2012
    Date of Patent: May 15, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshimichi Kajihara, Shinya Mizone, Kazuyoshi Mimura, Takashi Sabato, Kazuaki Nishimura
  • Patent number: 8141676
    Abstract: The present invention provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a central layer, a first glue layer attached to one side of the central layer, a second glue layer attached to another side of the central layer, an upper layer provided on the first glue layer, and a lower layer provided beneath the second glue layer. The anti-fatigue performance of the compound membrane is desirable.
    Type: Grant
    Filed: December 26, 2010
    Date of Patent: March 27, 2012
    Assignees: AAC Acoustic Technologies (Shenzhen) Co., Ltd., AAC Technologies Pet.Ltd.
    Inventor: Tao Shen
  • Patent number: 8122996
    Abstract: A speaker diaphragm is configured by a compound mixed with resin and bamboo fiber. The diaphragm satisfying the advantage of the bamboo fiber of high sound quality and a large degree of freedom in the setting of the characteristic value of the diaphragm and the advantage of the diaphragm made of a resin with improved humidity resistance reliability and strength, excellent external appearance, and enhanced productivity and dimension stability is obtained.
    Type: Grant
    Filed: December 20, 2007
    Date of Patent: February 28, 2012
    Assignee: Panasonic Corporation
    Inventors: Yoshimichi Kajihara, Shinya Mizone, Kazuyoshi Mimura, Takashi Sabato, Kazuaki Nishimura
  • Publication number: 20110272208
    Abstract: The present invention provides a compound membrane and an acoustic device including such a compound membrane. The compound membrane includes a central layer, a first glue layer attached to one side of the central layer, a second glue layer attached to another side of the central layer, an upper layer provided on the first glue layer, and a lower layer provided beneath the second glue layer. The anti-fatigue performance of the compound membrane is desirable.
    Type: Application
    Filed: December 26, 2010
    Publication date: November 10, 2011
    Inventor: Tao SHEN
  • Patent number: 8002079
    Abstract: A speaker diaphragm which includes a woven cloth which contains a thermosetting resin of thermo-cured state, and a paper board bonded and integrated with the woven cloth at the back surface. The woven cloth has its weave texture exposed on the front surface. The diaphragm has a high strength because it is made with a woven cloth; furthermore, its hardness is high because the thermosetting resin impregnated in woven cloth is in thermo-cured state. Thus the diaphragm helps implementing a speaker which demonstrates superior vibration characteristics in the high frequency sound region.
    Type: Grant
    Filed: July 10, 2008
    Date of Patent: August 23, 2011
    Assignee: Panasonic Corporation
    Inventor: Osamu Funahashi
  • Patent number: 7849958
    Abstract: A Vibration system part for a speaker device includes a woven fabric or a non-woven fabric made of basalt fiber produced by twist yarn or roving yarn being a continuous long-fiber. The vibration system part for the speaker device may be a diaphragm, a center cap, an edge or a damper, for example. In a preferred example, the woven fabric or the non-woven fabric is impregnated with thermosetting resin or thermoplastic resin. Additionally, a lamination member, such as paper, foam material, resin or a film, is preferably laminated (coated) on the woven fabric or the non-woven fabric. Thus, the vibration system parts for the speaker device, having excellent acoustic property and reliability, can be obtained at a low price.
    Type: Grant
    Filed: April 20, 2006
    Date of Patent: December 14, 2010
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Masatoshi Sato, Satoshi Hachiya, Hiroyuki Kobayashi, Koji Takayama
  • Patent number: 7845461
    Abstract: An acoustic diaphragm includes a diaphragm formed of a uniform material and a first standing wave suppression member provided on a surface of the diaphragm along a first direction of passing through a center of the diaphragm.
    Type: Grant
    Filed: August 6, 2008
    Date of Patent: December 7, 2010
    Assignee: Victor Company of Japan, Limited
    Inventors: Satoshi Imamura, Junji Iino, Shinji Kamimura
  • Patent number: 7775319
    Abstract: A diaphragm for use in a speaker is manufactured using a plurality of thin wooden boards having flat rectangular shapes. The thin wooden boards are impregnated with a resin; then, a plurality of cutouts, which are elongated along wooden fiber directions or which are elongated in directions crossing wooden fiber directions, are formed in the thin wooden boards. Instead of the cutouts, it is possible to form a plurality of folded portions elongated in directions crossing wooden fiber directions. The thin wooden boards are integrally laminated together in such a way that the wooden fiber directions thereof mutually cross with a prescribed angle therebetween. The thin wooden boards integrally laminated together are subjected to thermal pressing so as to form a wooden vibrator serving as the diaphragm. Thus, it is possible to easily produce the diaphragm having a high strength and superior acoustic characteristics without causing defects.
    Type: Grant
    Filed: June 22, 2007
    Date of Patent: August 17, 2010
    Assignee: Yamaha Corporation
    Inventors: Masao Imanishi, Yasutaka Nakamura
  • Patent number: 7726441
    Abstract: There is provided an acoustic vibratory plate having at least first to third laminated bodies layered. In the acoustic vibratory plate, the first and third laminated bodies are formed of a polymer material, and the second laminated body is formed of a polymer material different from the polymer material forming the first and third laminated bodies in dynamic internal loss.
    Type: Grant
    Filed: March 30, 2006
    Date of Patent: June 1, 2010
    Assignee: Sony Corporation
    Inventors: Masaru Uryu, Yoshio Ohashi, Kunihiko Tokura
  • Publication number: 20100108433
    Abstract: A method for manufacturing an electroacoustic transducer diaphragm of a multilayered structure which includes a first diaphragm layer made from a synthetic resin material and molded into a predetermined shape through injection molding, and a second diaphragm layer laminated in close contact with the first diaphragm layer and made from a material differing from that of the first diaphragm layer, the method includes inserting the second diaphragm layer into a mold for injection molding, and forming the first diaphragm layer integrally with the second diaphragm layer by injection foam-molding within the injection mold.
    Type: Application
    Filed: January 7, 2010
    Publication date: May 6, 2010
    Applicants: PIONEER CORPORATION, TOHOKU PIONEER CORPORATION
    Inventors: Koji Takayama, Masatoshi Sato, Shinichi Hayasaka, Hiroyuki Kobayashi
  • Patent number: 7708111
    Abstract: There is provided an acoustic diaphragm which includes a diaphragm base material composed of a paper article comprised of fine mica flakes, pulp fibers, and polyvinyl alcohol fibers and formed to be a multi-cellular structure; and a sheet material combined with the paper article or the diaphragm base material.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: May 4, 2010
    Assignee: Sony Corporation
    Inventors: Masaru Uryu, Kunihiko Tokura, Takahisa Tagami, Emiko Ikeda
  • Patent number: 7631723
    Abstract: A loudspeaker diaphragm having light weight and an excellent balance between a rigidity and an internal loss, and a simple and inexpensive method for manufacturing such a diaphragm are provided. The loudspeaker diaphragm includes a base layer having a woven fabric of a polyethylene naphthalate fiber impregnated with a thermosetting resin, and optionally a thermoplastic resin layer and/or a thermoplastic elastomer layer. The polyethylene naphthalate fiber is preferably an untwisted fiber. A fiber/resin weight ratio in the base layer is preferably in the range of 60/40 to 80/20. Preferably, the thermoplastic resin layer has a finely foamed structure and an average diameter of a cell in the finely foamed structure is 10 to 60 ?m.
    Type: Grant
    Filed: December 8, 2003
    Date of Patent: December 15, 2009
    Assignee: Onkyo Corporation
    Inventors: Yushi Ono, Toshihide Inoue
  • Patent number: 7546897
    Abstract: A speaker diaphragm made of a resin containing a thermoplastic polymeric material is provided. The speaker diaphragm includes a changed portion formed on the diaphragm that is molded using the resin. The changed portion is formed by partially changing physical properties of the thermoplastic polymeric material for dispersing local vibrations based on a characteristic of local vibrations measured in advance.
    Type: Grant
    Filed: July 14, 2006
    Date of Patent: June 16, 2009
    Assignee: Sony Corporation
    Inventors: Toru Takebe, Kunihiko Tokura, Masaru Uryu
  • Patent number: 7467686
    Abstract: On one surface of a piece of wooden sheet, a cloth or paper is adhered to make an adhered sheet. An approximately V-shaped notch is provided on the adhered sheet, the adhered sheet is wetted to be softened, and a lubricant which acts to keep water is impregnated thereinto. Edge portions of the notch are overlapped, and the adhered sheet is tentatively molded in an approximately horn shape by a first hot press molding. The adhered sheet is then dried, impregnated with thermosetting resin, and half-dried. The adhered sheet is subject to a second hot press molding. A moisture-proof agent is applied on the adhered sheet, a center hole for a voice coil and periphery are removed to make a speaker diaphragm having a predetermined dimension and shape.
    Type: Grant
    Filed: February 17, 2004
    Date of Patent: December 23, 2008
    Assignee: Victor Company of Japan, Limited
    Inventors: Satoshi Imamura, Takeshi Hirano, Tomoaki Ogata, Toshikatsu Kuwahata
  • Patent number: 7332215
    Abstract: A resin-molded component such as a loudspeaker diaphragm, in which rigidity is enhanced while light weight and high specific modulus of elasticity are maintained, is formed by applying carbon dioxide gas with a predetermined pressure to a thermoplastic resin in which crystallization is facilitated in the resin flowing direction to fill a mold. After the resin is filled, injection molding is performed by somewhat moving the mold to form five layers of: oriented minute-foaming layers, having approximately cylindrical foams, the length of which is twice the diameter thereof in the resin flowing direction in the mold, an unfoamed core layer positioned between both the foaming layers, and unfoamed skin layers formed on the front and rear surfaces.
    Type: Grant
    Filed: June 3, 2004
    Date of Patent: February 19, 2008
    Assignee: Sony Corporation
    Inventors: Kunihiko Tokura, Masaru Uryu
  • Patent number: 6912288
    Abstract: A piezoelectric electroacoustic transducer, including a plurality of piezoelectric layers deposited to define a deposited product, flexurally vibrates the deposited product by polarizing the entire piezoelectric ceramic layers in the same thickness direction and also by applying an alternating signal between external electrodes disposed on the front/rear major surfaces of the deposited product and an internal electrode disposed between the ceramic layers. A dummy electrode is provided between the ceramic layers outside the internal electrode via a gap, and a portion of the internal electrode is exposed at at least one side surface of the piezoelectric ceramic layers, while the dummy electrode is exposed at the other side surface of the piezoelectric ceramic layers. The external electrodes extend to the side surfaces other than the side surface at which the internal electrode is exposed.
    Type: Grant
    Filed: June 18, 2002
    Date of Patent: June 28, 2005
    Assignee: Murata Manufacturing Co., Ltd.
    Inventors: Mikio Nakashima, Sachihito Nakafuku, Kiyoshi Iyama
  • Patent number: 6814181
    Abstract: There is provided an electrically conductive damper device for a speaker in which local bending is reduced and break-downs of material of the damper and metallic wires incorporated in the damper are prevented, by additionally providing one or more sheets of damper fabric as a reinforcing damper 142 and by bonding it to a main damper 141 by way of various kinds of resin, in order to reinforce a neck portion of the electrically conductive damper. Further, properties of the damper can be adjusted by varying an outer diameter of the reinforcing damper 142, or by selecting the resin to be employed as an adhesive.
    Type: Grant
    Filed: October 22, 2001
    Date of Patent: November 9, 2004
    Assignees: Pioneer Corporation, Tohoku Pioneer Corporation
    Inventors: Yasuhisa Abe, Koji Matsumoto, Koji Takayama, Hiroyuki Tomiyama