WO2016124684A1 - Transducteur acoustique électrodynamique - Google Patents

Transducteur acoustique électrodynamique Download PDF

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Publication number
WO2016124684A1
WO2016124684A1 PCT/EP2016/052366 EP2016052366W WO2016124684A1 WO 2016124684 A1 WO2016124684 A1 WO 2016124684A1 EP 2016052366 W EP2016052366 W EP 2016052366W WO 2016124684 A1 WO2016124684 A1 WO 2016124684A1
Authority
WO
WIPO (PCT)
Prior art keywords
voice coil
air gap
transducer according
electrodynamic transducer
magnet system
Prior art date
Application number
PCT/EP2016/052366
Other languages
German (de)
English (en)
Inventor
André Michaelis
Heinz Epping
Kurt Mick
Original Assignee
Sennheiser Electronic Gmbh & Co. Kg
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 Sennheiser Electronic Gmbh & Co. Kg filed Critical Sennheiser Electronic Gmbh & Co. Kg
Priority to DE112016000596.2T priority Critical patent/DE112016000596A5/de
Publication of WO2016124684A1 publication Critical patent/WO2016124684A1/fr

Links

Classifications

    • 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
    • H04R9/041—Centering
    • H04R9/043—Inner suspension or damper, e.g. spider
    • 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
    • H04R9/046—Construction
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1008—Earpieces of the supra-aural or circum-aural type
    • 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
    • H04R9/08—Microphones

Definitions

  • the present invention relates to an electrodynamic transducer for a headphone or a microphone.
  • Electrodynamic transducers are well known and have a vibratable diaphragm, a voice coil connected thereto, and a magnet system. Such transducers can serve both for the generation and for the acquisition of audio signals.
  • the oscillating voice coil and diaphragm unit may, in some circumstances, tend to wobble.
  • no suitable measures are known for headphones and microphones due to the cramped space.
  • an electrodynamic transducer with a vibratable diaphragm, a voice coil having a first end, a length and a second end and a magnet system with a gap is provided.
  • the voice coil consists of a coil wire whose turns are connected by a glue coat. An additional coil support is not provided due to the limited space in headphones and microphones.
  • the first end of the voice coil is coupled to the diaphragm so that the voice coil vibrates together with the diaphragm.
  • the coil is disposed in the gap in the magnet system.
  • the length of the voice coil is designed such that the first end of the voice coil projects out of the magnet system.
  • the electrodynamic transducer further comprises a vibratory centering unit, which is coupled to the second free end of the voice coil for centering and / or guiding the voice coil.
  • a vibratory centering unit By means of the centering unit it can be achieved that it can not lead to a wobbling motion of the voice coil.
  • the first end of the centering unit is coupled to the magnet system or a chassis of the sound transducer.
  • a second end of the centering unit is coupled to the second end of the voice coil and thus guides the second end of the voice coil.
  • the centering unit is configured as a membrane or as a flex circuit board.
  • the centering unit is designed as a spiral conductor track element and serves for electrical ontakttechnik the voice coil.
  • the magnet system has an outer and an inner ring and a gap therebetween, wherein the magnet system is radially magnetized.
  • the width of the outer ring and the width of the inner ring tapers in the region of the gap, so that the second end of the voice coil protrudes under or out of the magnet system.
  • the centering unit has a plurality of arms which are respectively coupled to the second end of the voice coil for guiding the voice coil.
  • two of the arms are provided for electrically contacting the voice coil.
  • the magnet system comprises a magnetic cup having a plurality of recesses.
  • the voice coil is coupled in the region of the recesses of the cup with the arms of the centering unit.
  • the invention relates to the idea to provide an electrodynamic transducer for a headphone or a microphone, which has a vibratable diaphragm, a voice coil and a radially magnetized magnet system.
  • the (radially The magnetic system optionally has inner and outer rings and a gap therebetween in which the voice coil is placed.
  • the length of the voice coil is greater than the width of the inner and outer ring at the gap between the inner and outer ring.
  • a lower end of the voice coil protrudes beyond a lower end of the magnet system.
  • a vibratory centering unit is provided which is connected on the one hand to the lower end of the coil and on the other hand to the magnet system or a chassis of the transducer.
  • the centering unit is a resilient element such as a further membrane or a spirally arranged wire feed line.
  • the voice coil is guided parallel to the centering unit in an optimal position and prevented from wobbling or the tendency to tumble is reduced. This can result in that the compliance of the membrane can be reduced and thus an improved linear deflection of the membrane can be obtained. Further, the bead area of the diaphragm can be downsized, and the piston-shaped moving area can be increased. Furthermore, alternative membrane shapes can be made possible.
  • the centering unit may comprise flex circuit boards.
  • the magnet system is radially magnetized.
  • a flex circuit board can be used as a rear guide and optionally simultaneously as an electrical supply line.
  • a linear guidance of the coil behind the magnet is possible, so that a guide can be installed, which can lead to the membrane no longer tumbling.
  • FIG. 1 shows a schematic sectional view of an electrodynamic transducer according to a first exemplary embodiment of the invention
  • Fig. 2 shows a schematic representation of an electrodynamic
  • FIG. 3 shows four different perspective views of the electrodynamic transducer according to the second embodiment
  • FIG. 4 shows a perspective partial sectional view of an electrodynamic transducer according to a third exemplary embodiment
  • Fig. 5 shows a perspective view of the electrodynamic transducer according to the third embodiment
  • FIGs. Figures 6A-C show views of the magnet system of an electrodynamic
  • Fig. 1 shows a schematic sectional view of an electrodynamic transducer according to the invention.
  • the sound transducer 100 has a membrane 110, a magnet system 120, a voice coil 130, a chassis 150 and a centering unit 140.
  • the voice coil 130 consists of a coil wire whose turns are connected by a glue coat. An additional coil support is not provided due to the limited space in headphones and microphones.
  • the voice coil has a first end 131, a length 133 and a second end 132.
  • the first end 131 of the voice coil 130 is coupled to the oscillatable diaphragm 110.
  • the membrane 110 may include a bead portion 12 and a cap 11.
  • the first end 131 of the coil 130 may be fixed in a transition region 113.
  • the transition region 113 may form the edge of the dome 111.
  • the piston-shaped oscillating surface of the membrane 110 can be increased, since, for example, the bead region 112 can be reduced.
  • the region of the membrane 110 between the bead 112 and the transition region 1 3 may be configured as a cone 114.
  • the magnet system 120 consists of an outer ring 121 and an inner ring 122 and an air gap 160 in between.
  • the inner and outer rings 122, 121 are radially magnetized.
  • a magnetically conductive cup 180 can be provided to improve the magnetic return.
  • the width 120a of the inner and outer rings 122, 121 in the region of the gap 160 is less than the length 133 of the voice coil 130. This results in that the second end 32 of the voice coil 130th protrudes beyond the lower end of the magnet system.
  • the centering unit 140 is attached.
  • the centering unit 140 may be attached to the magnet system 120 or to the chassis 150 with a first end 141.
  • the second end 142 of the centering unit 140 is then attached to the second end 132 of the coil 130.
  • the centering unit 140 is oscillatable and can be configured as a membrane (annular) or as a spiral conductor track element.
  • the configuration as a spiral conductor track element is particularly advantageous for a power supply to the voice coil 130th
  • the centering unit 140 By means of the centering unit 140 thus the second end 132 of the voice coil 130 is fixed and guided, so that it can no longer break off laterally. As a result, the coil 130 can move only in the axial direction, so that the tendency to tumble can be significantly reduced.
  • the membrane 110 can be hung softer.
  • a centering unit 140 is shown according to the second embodiment.
  • the centering unit 140 has five arms 140a-140e which are connected to the second end 132 of the voice coil 130 to provide guidance of the voice coil. Of the five arms 140a-140e, two arms 140a, 140b have an electrical supply line for the coil 130. The remaining three arms 140c, 140d and 140e serve to guide the coil 130.
  • the structure of the electrodynamic transducer according to the second embodiment may correspond to the structure of the electrodynamic transducer according to the first embodiment.
  • the electrodynamic transducer according to the second embodiment may comprise a magnetically conductive cup 170.
  • FIG. 3 four different perspective views of the electrodynamic transducer according to the second embodiment of Fig. 2 are shown.
  • the electrodynamic transducer according to the second embodiment may optionally have no radially magnetized magnet system but a standard magnet system with a pole plate and a magnetic cup.
  • 4 shows a perspective partial sectional view of an electrodynamic sound transducer according to a third exemplary embodiment.
  • the configuration of the electrodynamic sound transducer according to the third embodiment substantially corresponds to the configuration of the electrodynamic sound transducer according to the second embodiment.
  • an electrodynamic transducer with a membrane 110, a voice coil 130, a magnet system 120, a chassis 150 and a centering unit 140 is provided.
  • the magnet system 120 in the third exemplary embodiment consists of a cup 170, a pole plate 182 and a magnet 181 arranged therebetween.
  • the coil 130 can oscillate in an air gap 160.
  • a first end 131 of the coil 130 is in contact with the membrane, in particular in the transition region 113 coupled.
  • the second end 132 of the coil is coupled to the second end 142 of the centering unit 140. This is done in particular via the (five) arms 140a-140e of the centering unit. At least two of the arms 140a, 140b of the centering unit 140 have an electrical supply line for the voice coil 130.
  • Fig. 5 shows a perspective view of the electrodynamic transducer according to the third embodiment. In Fig. 5, in particular, a bottom of the electrodynamic transducer according to the third embodiment is shown. Thus, in particular, the cup 170 and the centering unit 140 are shown.
  • the cup 170 is designed essentially round and has five recesses 171. In the region of these recesses 171, the voice coil 130 is electrically contacted and guided by the arms 140a-140e of the centering unit 140. Between the recesses 171, the cup 170 has closed portions 172 which serve as magnetic inference to improve the magnetic field in the air gap 160.
  • a broken magnet system (the cup 170 is pierced at the recesses 171) is provided so that the centering unit 140 can be connected to the voice coil 130. Because two of the arms of the centering unit can also be used for electrical contacting, the voice coil can thus be electrically contacted.
  • FIGS. 6A-C show views of the magnet system of an electrodynamic acoustic converter according to a fourth exemplary embodiment.
  • the configuration of the electrodynamic sound transducer according to the fourth embodiment may be based on the configuration of the electrodynamic sound transducer according to the third embodiment.
  • Fig. 6A shows a plan view of elements of the magnet system according to the fourth embodiment.
  • the pole plate 182 forms the inner boundary for the air gap 160, which is provided for the voice coil 130.
  • the magnetically conductive cup 170 forms the outer boundary of the air gap 160.
  • the cup 170 includes as in the third embodiment recesses 171, which are provided for the arms of the centering unit 140. As can be seen in FIG.
  • the recesses 171 result in the air gap 160 not being completely surrounded by the edge of the cup 170 at its outer edge but being interrupted at the recesses 171.
  • This means that the magnetic field in the air gap 160 is not constant along the entire circumference, but is made weaker at the locations of the recesses 171.
  • a pole ring 183 is additionally provided in the fourth embodiment.
  • Fig. 6B is a plan view of the magnet system according to the fourth embodiment.
  • the pole plate 182 forms the inner boundary for the air gap 160, which is provided for the voice coil 130.
  • the magnet system additionally has a pole ring 183.
  • the pole ring 183 has an inner circular opening, which forms the outer boundary of the air gap 160 in the fourth embodiment.
  • the pole ring 183 is preferably arranged in a plane with the pole plate 182 centered around the pole plate, so that an air gap 160 is formed with a constant width over the circumference.
  • Below the pole ring 183 is in Fig. 6B covered the cup 170 with the recesses 171 as shown in Fig. 6A.
  • FIG. 6C shows a sectional view of the magnet system according to the fourth embodiment.
  • the sectional view of the cup 170 is shown so that on the right side of the recesses 171 can be seen.
  • Centered in the cup 170 is the magnet 181, above which the pole plate 182 is disposed.
  • On the upper edge of the cup 170 of the pole ring 183 is arranged.
  • the inner diameter of the pole ring 183 is preferably smaller than the inner diameter of the wall of the cup 170 so that the pole ring 183 protrudes inwardly over the periphery of the cup over the entire circumference.
  • the pole ring 183 preferably has the same thickness as the pole plate 182.
  • the cup 170, the pole plate 182 and the pole ring 183 are made of magnetically conductive material.
  • the magnetic field in the air gap 160 is completely, ie surrounded by the pole ring 183 without interruptions.
  • a constant magnetic field is generated over the circumference of the air gap 160.
  • the weakening of the magnetic field at the locations of the recesses 171 is thus compensated by the closed pole ring 183.
  • the electrodynamic transducer according to the invention may have a conventional magnet system with a magnet, a cup and a pole plate (see FIG or alternatively, the magnet system may have an inner and outer ring and be radially magnetized (see Fig. 1).
  • the transducer according to the invention can be used in a microphone or a handset.
  • the outer diameter of the membrane 110 is preferably less than 40 mm in the case of microphones and headphones.
  • the e.g. included in Fig. 1 and Fig. 4 voice coil 130 It consists over its entire length 133 from the first end 31 to the second end 132 of a uniformly distributed number of turns, which are interconnected by a self-supporting adhesive coating.
  • the air gap 160 is bounded from the inside by the magnetic ring 122. Measured by the height of the magnetic ring 122 in the direction of the coil length 133 results in a magnetic effective range of the air gap, in which the magnetic field is strongest, and thus essentially generates the drive of the coil.
  • a pole plate 182 is provided in the other exemplary embodiments, which delimits the air gap 160 from the inside.
  • a magnetic effective range of the air gap is defined by the thickness of the pole plate 182 measured in the direction of the coil length 133, in which the magnetic field is strongest, and thus essentially generates the drive of the coil 130.
  • the magnetic effective range measured in the direction of the coil length 133 thus has a certain height.
  • the coil length 133 is greater than the height of the magnetic effective range of the air gap.
  • the voice coil 130 is then arranged so that it projects out of the magnetic effective range of the air gap at all (in its first end 131) as well as down (with its second end 132) in all occurring during normal operation deflections of the membrane.
  • an equal proportion of the evenly distributed turns of the coil will be within the magnetic effective range of the air gap 160. Since the same current flows in all turns of the voice coil 130, the magnetically generated driving force for the voice coil 130 is 130 thus independent of the current position of the coil 130 in the air gap.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Abstract

L'invention concerne un transducteur acoustique électrodynamique qui comprend une membrane vibrante (110), une bobine mobile (130) ayant une première extrémité (131), une longueur (133) et une seconde extrémité (131, 132) ainsi qu'un système magnétique (120) pourvu d'une fente (160). La première extrémité (131) de la bobine mobile (130) est accouplée à la membrane (110) de sorte que la bobine mobile (130) oscille conjointement avec la membrane (110). La bobine (130) est disposée dans la fente (160) ménagée dans le système magnétique (120). La longueur de la bobine mobile (130) est dimensionnée de telle sorte que la première extrémité (131) de la bobine mobile (130) fait saillie du système magnétique (120) ou au-dessous de celui-ci. Le transducteur acoustique électrodynamique comprend en outre une unité de centrage oscillante (140) qui est accouplée à la seconde extrémité libre (132) de la bobine mobile (130) pour centrer et/ou guider la bobine mobile (130).
PCT/EP2016/052366 2015-02-04 2016-02-04 Transducteur acoustique électrodynamique WO2016124684A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
DE112016000596.2T DE112016000596A5 (de) 2015-02-04 2016-02-04 Elektrodynamischer Schallwandler

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102015201940.3A DE102015201940A1 (de) 2015-02-04 2015-02-04 Elektrodynamischer Schallwandler
DE102015201940.3 2015-02-04

Publications (1)

Publication Number Publication Date
WO2016124684A1 true WO2016124684A1 (fr) 2016-08-11

Family

ID=55299486

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2016/052366 WO2016124684A1 (fr) 2015-02-04 2016-02-04 Transducteur acoustique électrodynamique

Country Status (2)

Country Link
DE (2) DE102015201940A1 (fr)
WO (1) WO2016124684A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113841423A (zh) * 2019-04-11 2021-12-24 大陆工程服务有限公司 用于汽车中高性能低音播放的刚性结构的振动致动器
US11973389B2 (en) 2020-11-02 2024-04-30 Continental Engineering Services Gmbh Actuator for exciting vibration having at least one electrically conductive ring
WO2024119343A1 (fr) * 2022-12-06 2024-06-13 瑞声光电科技(常州)有限公司 Haut-parleur

Citations (14)

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US1957562A (en) * 1932-06-11 1934-05-08 Magnavox Co Diaphragm mounting
GB2067378A (en) * 1979-12-31 1981-07-22 Sony Corp Electro-acoustic transducers
WO1996004706A1 (fr) * 1994-08-03 1996-02-15 Aura Systems, Inc. Actionneur a bobine mobile et a aimant radial a focalisation axiale
US5790682A (en) * 1996-05-28 1998-08-04 Pioneer Electronic Corporation Damper for speaker
US6526151B1 (en) * 2000-06-29 2003-02-25 Meiloon Industrial Co., Ltd. High stability loudspeaker
WO2004034737A1 (fr) * 2002-10-10 2004-04-22 New Transducers Limited Ensemble magnetique pour haut-parleurs
EP1418792A2 (fr) * 2002-11-05 2004-05-12 Step Technologies Inc Transducteur à entrefers magnétiques multiples en push-push
US20040218778A1 (en) * 2003-05-01 2004-11-04 Weisman Richard L. Loudspeaker suspension for achieving very long excursion
US20070160257A1 (en) * 2005-04-13 2007-07-12 Stiles Enrique M Axial magnet assisted radial magnet air return motor for electromagnetic transducer
US20080001016A1 (en) * 2004-08-27 2008-01-03 Koninklijke Philips Electronics N.V. Method of Manufacturing a Coil
EP2131606A2 (fr) * 2008-06-02 2009-12-09 Hosiden Corporation Haut-parleur
US20110075880A1 (en) * 2009-09-25 2011-03-31 Hosiden Corporation Speaker damper and speaker including the same
US20130016874A1 (en) * 2011-04-04 2013-01-17 Aac Technologies Holdings Inc. Micro-speaker
US20140219479A1 (en) * 2013-02-07 2014-08-07 Apple Inc. Speaker magnet assembly with included spider

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Publication number Priority date Publication date Assignee Title
US6853734B2 (en) * 2002-05-20 2005-02-08 Joseph Y. Sahyoun Audio speaker damper with electrically conductive paths thereon to carry voice coil signals and a method therefore
US20080285787A1 (en) * 2007-05-17 2008-11-20 Sun Szu-Wei Thin loudspeaker
US8290199B2 (en) * 2009-05-21 2012-10-16 Bose Corporation Loudspeaker suspension
US9485586B2 (en) * 2013-03-15 2016-11-01 Jeffery K Permanian Speaker driver

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1957562A (en) * 1932-06-11 1934-05-08 Magnavox Co Diaphragm mounting
GB2067378A (en) * 1979-12-31 1981-07-22 Sony Corp Electro-acoustic transducers
WO1996004706A1 (fr) * 1994-08-03 1996-02-15 Aura Systems, Inc. Actionneur a bobine mobile et a aimant radial a focalisation axiale
US5790682A (en) * 1996-05-28 1998-08-04 Pioneer Electronic Corporation Damper for speaker
US6526151B1 (en) * 2000-06-29 2003-02-25 Meiloon Industrial Co., Ltd. High stability loudspeaker
WO2004034737A1 (fr) * 2002-10-10 2004-04-22 New Transducers Limited Ensemble magnetique pour haut-parleurs
EP1418792A2 (fr) * 2002-11-05 2004-05-12 Step Technologies Inc Transducteur à entrefers magnétiques multiples en push-push
US20040218778A1 (en) * 2003-05-01 2004-11-04 Weisman Richard L. Loudspeaker suspension for achieving very long excursion
US20080001016A1 (en) * 2004-08-27 2008-01-03 Koninklijke Philips Electronics N.V. Method of Manufacturing a Coil
US20070160257A1 (en) * 2005-04-13 2007-07-12 Stiles Enrique M Axial magnet assisted radial magnet air return motor for electromagnetic transducer
EP2131606A2 (fr) * 2008-06-02 2009-12-09 Hosiden Corporation Haut-parleur
US20110075880A1 (en) * 2009-09-25 2011-03-31 Hosiden Corporation Speaker damper and speaker including the same
US20130016874A1 (en) * 2011-04-04 2013-01-17 Aac Technologies Holdings Inc. Micro-speaker
US20140219479A1 (en) * 2013-02-07 2014-08-07 Apple Inc. Speaker magnet assembly with included spider

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113841423A (zh) * 2019-04-11 2021-12-24 大陆工程服务有限公司 用于汽车中高性能低音播放的刚性结构的振动致动器
US11943599B2 (en) 2019-04-11 2024-03-26 Continental Engineering Services Gmbh Vibration actuator for rigid structures for high-performance bass playback in automobiles
US11973389B2 (en) 2020-11-02 2024-04-30 Continental Engineering Services Gmbh Actuator for exciting vibration having at least one electrically conductive ring
WO2024119343A1 (fr) * 2022-12-06 2024-06-13 瑞声光电科技(常州)有限公司 Haut-parleur

Also Published As

Publication number Publication date
DE112016000596A5 (de) 2017-12-21
DE102015201940A1 (de) 2016-08-04

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