EP3840408A1 - Actionneur destiné à la génération de bruit de structure - Google Patents

Actionneur destiné à la génération de bruit de structure Download PDF

Info

Publication number
EP3840408A1
EP3840408A1 EP20211836.0A EP20211836A EP3840408A1 EP 3840408 A1 EP3840408 A1 EP 3840408A1 EP 20211836 A EP20211836 A EP 20211836A EP 3840408 A1 EP3840408 A1 EP 3840408A1
Authority
EP
European Patent Office
Prior art keywords
flat body
housing
actuator
permanent magnet
actuator according
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP20211836.0A
Other languages
German (de)
English (en)
Inventor
Christian Walther
Dimitrios Patsouras
Robert Joest
Stephan Eisele
Johannes Kerkmann
Karsten Moritz
Pascal KÖHLER
Robert Wick
Jens Friedrich
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Continental Engineering Services GmbH
Original Assignee
Continental Engineering Services GmbH
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Continental Engineering Services GmbH filed Critical Continental Engineering Services GmbH
Publication of EP3840408A1 publication Critical patent/EP3840408A1/fr
Withdrawn legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/045—Plane diaphragms using the distributed mode principle, i.e. whereby the acoustic radiation is emanated from uniformly distributed free bending wave vibration induced in a stiff panel and not from pistonic motion
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R15/00—Magnetostrictive transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/025—Magnetic circuit
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/02—Details
    • H04R9/04—Construction, mounting, or centering of coil
    • H04R9/045—Mounting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R9/00—Transducers of moving-coil, moving-strip, or moving-wire type
    • H04R9/06—Loudspeakers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2499/00—Aspects covered by H04R or H04S not otherwise provided for in their subgroups
    • H04R2499/10—General applications
    • H04R2499/13—Acoustic transducers and sound field adaptation in vehicles

Definitions

  • the invention relates to an actuator according to the preamble of claim 1.
  • the invention is based on the object of proposing an actuator which is robust and / or inexpensive and / or is particularly suitable for generating sound with frequencies of up to at least 18 kHz.
  • the invention is preferably based on the idea of proposing an actuator comprising an electrical drive for converting electrical signals into mechanical deflections or mechanical vibrations, the drive having a coil through which the current of the electrical signal can flow or flows and a permanent magnet which can or is in electromagnetic interaction with the coil, furthermore the actuator has a housing and a flat body, wherein the flat body can or is mechanically deflected and / or mechanically excited to vibrate by the electric drive and can thereby emit acoustic sound signals, the flat body being connected in one piece to at least part of the housing and at least part of the electric drive being connected to the flat body.
  • the electrical signals through the coil expediently have the information of the sound signal to be emitted, in particular a music signal.
  • the actuator comprising the flat body, which is designed to emit acoustic sound
  • the actuator is designed in particular as a bending wave radiator and / or is designed so that the actuator excites or can stimulate the flat body to natural oscillations of its body structure, whereby the flat body surrounded by air emits sound waves.
  • flat body is preferably understood to mean an acoustically usable vibratory body and / or a body whose contour consists essentially of lateral surfaces, i.e. which is in particular not made solid or compact, and / or as a shell-shaped body and / or its thickness , in particular the thickness of its outer surface, is 2 cm or less, expediently 0.6 cm or less, this limitation of the thickness particularly preferably relating to at least 95% of its outer surface and / or outer surface.
  • the flat body is expediently essentially planar or curved and / or folded several times and / or fissured several times and / or bent several times.
  • the flat body is preferably designed as a part or segment of the interior trim of a motor vehicle.
  • the flat body and / or the housing, in particular the first and second housing parts are made of plastic, particularly preferably of thermoplastic, very particularly preferably of acrylonitrile-butadiene-styrene copolymer, ABS or polyphenylene ether.
  • the flat body and the first housing part are preferably designed in one piece as a common plastic injection-molded part.
  • the actuator is preferably designed, in particular with regard to the flat body, as a structure-borne sound transducer or structure-borne sound exciter, which can acoustically emit sound via the flat body, designed as a broadband and / or high-frequency transducer, the sound frequencies of up to at least 18 kHz, in particular can produce preferably -3 dB frequency response / amplitude response.
  • the drive preferably has the coil and a coil carrier, the coil carrier and / or the coil being directly connected to the flat body and in particular the coil carrier being partially injected into the flat body or injection-molded onto it or attached by injection molding.
  • the coil carrier is expediently a frame on which the coil is wound.
  • a first housing part of the housing in particular essentially ring-shaped, is integrally connected to the flat body and that this first housing part is expediently connected to the permanent magnet by means of at least one centering device and the permanent magnet is mounted or suspended so as to oscillate by means of the centering device .
  • the centering device is particularly preferably designed as a centering spider and very particularly preferably the permanent magnet is suspended / supported by means of two separate centering devices which are spaced apart from one another and are in particular aligned essentially parallel to one another.
  • the first housing part is alternatively preferably designed with an essentially rectangular or polygonal and thereby rounded base area, in particular designed as a ring.
  • the rectangular base area is particularly preferably designed in such a way that one side length is at least three times or ten times as long as the other.
  • the permanent magnet is expediently based on neodymium or comprises a neodymium-based alloy.
  • the permanent magnet preferably comprises a ferrite-based alloy.
  • the permanent magnet has an outer ring and a base as well as an inner part, which in particular comprises a first and a second disk-shaped part. Between the ring part of the permanent magnet and the inner part of the permanent magnet, an air gap is formed around the circumference as a slot-shaped recess.
  • the permanent magnet is particularly preferably designed to be essentially cylindrical.
  • the inner part very particularly preferably has of the permanent magnet a neodymium alloy and the other parts of the permanent magnet are made of iron or a ferromagnetic material.
  • the first housing part preferably forms a substantially closed and / or tight housing with a second housing part of the housing.
  • first housing part is connected to the second housing part by means of a form-fitting connection, in particular by means of a latching connection and / or clip connection.
  • This latching connection and / or clip connection is particularly preferably designed to be detachable.
  • the first housing part is preferably connected to the second housing part by means of a material connection, such as by means of welding or ultrasonic or friction welding or by means of gluing.
  • the actuator is designed and the permanent magnet is mounted / suspended such that the permanent magnet is positioned with its center of gravity essentially in the area of the plane of the radiating surface of the flat body with regard to its undeflected state.
  • This plane is defined in particular as the tangential plane to the surface / lateral surface of the body in the area where the housing is connected to the flat body.
  • the first and the second housing part are preferably designed and arranged in such a way that they break through the plane of the radiating surface of the flat body or emerge on both sides of the flat body or out of its jacket.
  • the actuator is preferably designed such that the first and the second housing part are designed and arranged protruding to a single side on the flat body, in particular with regard to the plane of the radiating surface on one side.
  • the first housing part is expediently formed on the flat body, in particular protruding from its surface exclusively to one side, particularly preferably not dipping into the surface or the tangential plane of the surface of the flat body, and the second housing part is very particularly preferably with the first Housing part connected also arranged protruding to this single side.
  • the actuator preferably has a seal between the first and the second housing part, for example a labyrinth seal or an annular elastic seal, in particular made of elastomer or rubber.
  • the flat body preferably has an essentially planar radiating surface and / or a surface with an angular curvature of less than 20 °, in particular in the area of the housing connected to the flat body.
  • the flat body is preferably designed as an interior trim part or an exterior trim part or a body part of a motor vehicle.
  • the first and / or the second housing part have at least one ventilation opening to avoid compression.
  • the invention also relates to the use of the actuator for generating acoustic sound in motor vehicles.
  • Fig. 1 shows a curved flat body 4 on one outer surface of which the first housing part 5 is formed in one piece.
  • Flat body 4 and first housing part 5 are designed as a common plastic injection-molded part.
  • the first housing part has, on its inner casing, a groove 9, for example a circumferential one, with which the second housing part 6 is or can be latched or positively connected.
  • coil 2 In the interior of the first and second housing parts 5, 6 there is arranged coil 2, which is connected directly to the flat body 4 or is fixed directly on it, for example by being injection molded with plastic.
  • FIG. 2 an exemplary embodiment of the actuator is illustrated in which the first and second housing parts 5, 6 are designed and arranged in such a way that they break through the plane 10 of the radiating surface of the flat body 4.
  • the thickness of its outer surface or the radiating surface 10 is, for example, less than 0.6 cm.
  • the first housing part 5 is connected in one piece to the flat body 4 and has ventilation openings 8.
  • the first and second housing parts 5, 6 are positively connected to one another and form an essentially ring-shaped housing.
  • Permanent magnet 3 is suspended from the first housing part 5 by means of two separate centering devices 7 such that it can vibrate.
  • Coil 2 is attached directly to the flat body 4, is immersed in a circumferential air gap of the permanent magnet 3.
  • Permanent magnet 3 has, for example, a cylindrical shape with a circumferential slot-shaped air gap 11.
  • the inner part of the permanent magnet is divided into two parts, a first disk-shaped part 12, for example, designed as a pole plate of the permanent magnet, for example made of iron or a ferromagnetic material.
  • An inner, second disk-shaped part 15 of the inner part of the permanent magnet is formed from a neodymium alloy and is arranged on the bottom 13 of the permanent magnet.
  • the first disk-shaped part 12 is arranged on the side of the second disk-shaped part 15 of the permanent magnet facing away from the bottom 13.
  • the bottom 13 and the outer ring 14 are made of iron or a ferromagnetic material.
  • the inner part 12, 15 of the permanent magnet is cylindrical and is surrounded by an air gap 11 with regard to its outer surface. Coil 2 is immersed in air gap 11.
  • Permanent magnet 3 is suspended on its outer circumferential surface of outer ring 14 on two separate centering devices 7 which are spaced apart and are essentially aligned parallel to one another in the undeflected state. Permanent magnet 3 thus comprises an outer ring 14 and a bottom 13 as well as an inner part which has first and second disc-shaped parts 12 and 15. Between the ring 14 and the inner part 12 and 15, the air gap 2 is designed as a slot-shaped recess.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Reciprocating, Oscillating Or Vibrating Motors (AREA)
EP20211836.0A 2019-12-20 2020-12-04 Actionneur destiné à la génération de bruit de structure Withdrawn EP3840408A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102019220476 2019-12-20

Publications (1)

Publication Number Publication Date
EP3840408A1 true EP3840408A1 (fr) 2021-06-23

Family

ID=73726618

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20211836.0A Withdrawn EP3840408A1 (fr) 2019-12-20 2020-12-04 Actionneur destiné à la génération de bruit de structure

Country Status (3)

Country Link
US (1) US11589168B2 (fr)
EP (1) EP3840408A1 (fr)
CN (1) CN113015067B (fr)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
US20010012369A1 (en) * 1998-11-03 2001-08-09 Stanley L. Marquiss Integrated panel loudspeaker system adapted to be mounted in a vehicle
US20060034467A1 (en) * 1999-08-25 2006-02-16 Lear Corporation Vehicular audio system including a headliner speaker, electromagnetic transducer assembly for use therein and computer system programmed with a graphic software control for changing the audio system's signal level and delay
WO2006078623A1 (fr) * 2005-01-18 2006-07-27 Intier Automotive Inc. Ensemble panneau de garniture destine a retenir un dispositif acoustique
DE102016217487A1 (de) * 2016-09-14 2018-03-15 Robert Bosch Gmbh Elektrischer Schwingungserreger zur Schallerzeugung

Family Cites Families (20)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
ATA10993A (de) * 1993-01-25 1999-06-15 Schertler Stephan Tonabnehmer
US5625701A (en) * 1993-08-05 1997-04-29 Bose Corporation Loudspeaker diaphragm attaching
US5754664A (en) * 1993-09-09 1998-05-19 Prince Corporation Vehicle audio system
GB9714050D0 (en) * 1997-07-03 1997-09-10 New Transducers Ltd Panel-form loudspeakers
US6630998B1 (en) 1998-08-13 2003-10-07 Acushnet Company Apparatus and method for automated game ball inspection
JP3975816B2 (ja) * 2001-07-13 2007-09-12 ヤマハ株式会社 水槽用水中音響放射装置
US6929091B2 (en) * 2002-10-28 2005-08-16 Sound Advance Systems, Inc. Planar diaphragm loudspeaker and related methods
US20060153406A1 (en) * 2003-03-07 2006-07-13 Koninklijke Phlips Electronics N.V. Bending wave loudspeaker
US7817810B2 (en) * 2005-08-03 2010-10-19 The Boeing Company Flat panel loudspeaker system
US7819456B2 (en) * 2008-01-09 2010-10-26 Toyota Motor Engineering & Manufacturing North America, Inc. Instrument panel covers with lockout ribs
US7971923B2 (en) * 2009-03-04 2011-07-05 GM Global Technology Operations LLC Door trim panel assembly and method
US9154862B2 (en) * 2013-06-27 2015-10-06 The Boeing Company Flat panel loudspeaker system
GB2527533B (en) * 2014-06-24 2016-07-13 Amina Tech Ltd Moving coil drive unit and audio drivers incorporating the same
DE102014218427B4 (de) 2014-09-15 2016-06-02 Kendrion Kuhnke Automotive GmbH Lautsprecher, insbesondere elektrodynamischer Lautsprecher
KR20170114471A (ko) * 2016-04-05 2017-10-16 엘지디스플레이 주식회사 유기발광 표시 장치
KR101704517B1 (ko) * 2016-03-28 2017-02-09 엘지디스플레이 주식회사 패널 진동형 음향 발생 표시 장치
US10142739B2 (en) * 2016-03-28 2018-11-27 Lg Display Co., Ltd. Panel vibration type display device for generating sound
US10848874B2 (en) * 2018-02-20 2020-11-24 Google Llc Panel audio loudspeaker electromagnetic actuator
US10841704B2 (en) * 2018-04-06 2020-11-17 Google Llc Distributed mode loudspeaker electromagnetic actuator with axially and radially magnetized circuit
US11780378B2 (en) * 2020-12-21 2023-10-10 Harman International Industries, Incorporated Tweeter flush, surface, and starfish mount installation

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique
US20010012369A1 (en) * 1998-11-03 2001-08-09 Stanley L. Marquiss Integrated panel loudspeaker system adapted to be mounted in a vehicle
US20060034467A1 (en) * 1999-08-25 2006-02-16 Lear Corporation Vehicular audio system including a headliner speaker, electromagnetic transducer assembly for use therein and computer system programmed with a graphic software control for changing the audio system's signal level and delay
WO2006078623A1 (fr) * 2005-01-18 2006-07-27 Intier Automotive Inc. Ensemble panneau de garniture destine a retenir un dispositif acoustique
DE102016217487A1 (de) * 2016-09-14 2018-03-15 Robert Bosch Gmbh Elektrischer Schwingungserreger zur Schallerzeugung

Also Published As

Publication number Publication date
US20210195337A1 (en) 2021-06-24
CN113015067B (zh) 2023-10-20
CN113015067A (zh) 2021-06-22
US11589168B2 (en) 2023-02-21

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