EP0806883A2 - Haut-parleur - Google Patents

Haut-parleur Download PDF

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Publication number
EP0806883A2
EP0806883A2 EP97107291A EP97107291A EP0806883A2 EP 0806883 A2 EP0806883 A2 EP 0806883A2 EP 97107291 A EP97107291 A EP 97107291A EP 97107291 A EP97107291 A EP 97107291A EP 0806883 A2 EP0806883 A2 EP 0806883A2
Authority
EP
European Patent Office
Prior art keywords
core
centering
pot
loudspeaker
basket
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Withdrawn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
EP97107291A
Other languages
German (de)
English (en)
Inventor
Stefan Geisenberger
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.)
Nokia Technology GmbH
Original Assignee
Nokia Technology 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 Nokia Technology GmbH filed Critical Nokia Technology GmbH
Publication of EP0806883A2 publication Critical patent/EP0806883A2/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Withdrawn legal-status Critical Current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
    • 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
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • 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
    • H04R2209/00—Details of transducers of the moving-coil, moving-strip, or moving-wire type covered by H04R9/00 but not provided for in any of its subgroups
    • H04R2209/024—Manufacturing aspects of the magnetic circuit of loudspeaker or microphone transducers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R31/00—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor
    • H04R31/006—Interconnection of transducer parts

Definitions

  • the invention relates to the design and a method for producing loudspeakers which have a magnet system arranged in the membrane cone.
  • loudspeakers are usually designed in such a way that a magnet system is first produced, which is then connected to a loudspeaker basket.
  • a vibrating unit is then inserted into this unit, which is formed by a membrane, a bead, a centering membrane and a voice coil support provided with the voice coil.
  • this unit which is formed by a membrane, a bead, a centering membrane and a voice coil support provided with the voice coil.
  • a centering sleeve is inserted between the pole core and the voice coil base in the unit shown in DE-A-4113017 and having a magnet system attached to the outside of the basket.
  • loudspeakers are known whose magnet system is not attached to the outside of the head, but rather is largely placed within the space encased by the conical membrane.
  • the magnet system is formed by a pot and a core inserted into the pot.
  • the core has a magnetic piece and a pole disk.
  • the invention is therefore based on the object of specifying a loudspeaker with a magnet system arranged in the membrane cone, which can also be produced with very high manufacturing precision on production lines which are also used for producing loudspeakers with magnet systems attached to the outside of the basket.
  • the basic idea of the present invention is not to completely design the magnet system of the loudspeaker before it is connected to the loudspeaker basket, but rather to complete the magnet system in the ongoing production of the loudspeaker.
  • This step-by-step design of the magnet system makes it possible to manufacture loudspeakers with internal magnet systems on production lines, which are also used to produce loudspeakers with magnet systems attached to the outside of the basket, without the manufacturing quality for loudspeakers with internal magnet systems falling as a result.
  • the latter is due to the fact that a gradual build-up of magnet systems means that the speakers on the outside of the basket attached magnet systems commonly used centering sleeves can continue to be used.
  • the step-by-step construction of the magnet system during loudspeaker production also counteracts a prejudice according to which loudspeaker manufacturers prefer the use of magnet systems provided with appropriate yoke parts. If neodymium, high-quality ferrite material or another high-quality magnetic material is used as the magnetic material, there is no need to fear that, at the temperatures usually prevailing in production, there will be a permanent reduction in the magnetic values of the magnetic pieces which have already been magnetized before being connected to the yoke parts.
  • the side of the pot facing away from the core can be used as a place of use for a further loudspeaker without permanent magnets having to be provided for this loudspeaker via magnetic pieces.
  • Adhesion or screwing between the centering pin and the centering hole can be dispensed with if the loudspeaker is designed in accordance with claims 5 and 6, respectively.
  • FIG. 1 shows a speaker (10) in a schematic side view.
  • This loudspeaker (10) is essentially formed by a loudspeaker basket (11), a magnet system (12) and a vibrating unit (13).
  • the vibrating unit (13), which is inserted into the loudspeaker basket (11), comprises a conical membrane (14), a bead (15), a centering membrane (16) and a voice coil support (18) wrapped with a voice coil (17).
  • the outer edges of the centering membrane (16) and bead (15) are glued to the basket.
  • the magnet system (12) is formed by a pot (19) and a core (20).
  • This core (20) comprises three annular disks (21-23) which are stacked one above the other in the longitudinal direction of the loudspeaker center axis.
  • the middle circular disk (22) forms the so-called pole disk.
  • the two outer annular disks (21, 23), which are in physical contact with different annular surfaces of the pole disk (22), are formed from magnetic material and are also drawn as magnetic pieces in connection with this application. For the sake of completeness, it should be pointed out that those annular surfaces of the two magnet pieces (21, 23) which face the pole disk (22) have the same polarity in the magnetized state.
  • the centering holes (28) in the circular ring disks (21-23) all have the same inner diameter and this because a tight tolerance for the to obtain a high quality of manufacture Centering holes (28) and the pin (27) is necessary, the manufacture of a magnet system (12) shown in Figure 1 considerably expensive, in another (not shown) embodiment, the number of annular disks (21-23) with a narrow inner diameter tolerance to one be restricted.
  • the pole disk (22) should be the disk whose centering hole (28) exclusively centers the centering pin (27) because this is the only way to ensure a uniform air gap (31).
  • the pot (19) together with the centering pin (27) is made in one piece and consists of a material that conducts the magnetism. This material was also used to manufacture the pole disk (22).
  • the loudspeaker basket (11) should be made of a para or diamagnetic material. Many plastics, but also certain metals and metal alloys, are suitable for this.
  • the two magnetic pieces (21, 23) are made of neodymium. However, this is not restricted to this material. Rather, in another exemplary embodiment, the magnetic pieces (21, 23) can also be formed from ferrite or AlNiCo. However, if the magnet system (12) is to be very compact and also ensure a high induction in the air gap (31), then neodymium should be used as the magnetic material.
  • a magnet system which has only one magnet piece (21) in the core (20) is explained in more detail in connection with FIG. 3. If a loudspeaker (10) with an internal magnet system (12) is to be produced on a production line which is also used for the production of loudspeakers according to DE-A-4113017, this can be done by following the steps illustrated in FIGS. 2a-2d.
  • FIG. 2a A correspondingly designed vibration unit (13) is shown in FIG. 2a.
  • the serpentine lines indicated in FIG. 2a make it clear that the unit (13) is formed from a large number of individual components.
  • the various individual components in FIG. 2a have been provided with the reference symbols already indicated in FIG. 1 and also explained there in greater detail.
  • FIG. 2b A loudspeaker basket (11) is shown in FIG. 2b.
  • the illustration clearly shows that the base (25) in the base (24) is provided with a base opening (29).
  • the loudspeaker basket (11) is manufactured, it is first necessary to place the core (20), which consists of a plurality of circular washers (21-23), on the base (25).
  • the latter can be done in a variety of ways. For this purpose - as shown in FIG. 2b - the various circular washers (21-23) can be piled up on the base (25) according to the arrows.
  • a unit can also be formed beforehand from all annular disks (21-23) and this unit can then be placed on the base (25). The latter is shown in more detail in FIG. 3, although the unit shown there only consists of two annular disks (21, 22).
  • annular disks (21-23) shown in FIG. 2b must be connected to one another and / or to the base (25) depends on the circumstances of the individual case, in particular on the size of the inner diameter of the various ones in the core ( 20) used washers (21-23). If the annular disks (21; 23) used in FIG. 1, which are formed from magnetic material, have not yet been magnetized when the core (20) is being produced, then a mutual connection is not necessary until the magnetization. If, on the other hand, magnetized circular disks (21; 23) with the same inside diameter with respect to the inside diameter of the pole disk (22) are stacked on the mounting mandrel (33), then a connection between the magnet pieces (21; 23) with the pole disk (22) advisable.
  • Washers (21-23) which - as indicated above - have different inner diameters.
  • a connection of the circular disc (23) to the base (25) is not required after all the discs (21-23) have been placed on the base (25) if, for example, the core (20) or the discs () 21-23) by means of the end of the centering pin (27) emerging from the base (25).
  • the vibration unit (13) shown in FIG. 2a is to be inserted into the loudspeaker basket (11) provided with the core (20).
  • the voice unit (13) it is necessary to place a centering sleeve (34) between the core (20) and the voice coil former (18) corresponding to that of the centering sleeve (34) insert the adjacent arrow.
  • the corresponding magnetic pieces (21; 23) of the core (20) should also be magnetized at the latest before the vibration unit (13) is inserted into the loudspeaker basket (11).
  • the respective magnet pieces (21; 23) should be permanently connected to the pole disk (22) at least at this point in time.
  • the temperature on the production line should not be below 10 ° C and for neodymium not above 50 ° C. If the magnet systems (12) are provided with appropriate inference parts, changes in the flux density due to temperature are completely eliminated.
  • the assembly mandrel (33) can also be removed from the centering hole (28) at the same time as the centering sleeve (34) is pulled out. If the last conditions are not present, the mounting mandrel (33) can also be pressed out of the centering hole (28) by inserting the centering pin (27) (not shown in FIG. 2d). If the free end of the centering pin (27) is provided with a nose (35) which engages in a corresponding blind hole (not shown in FIG. 2d) in the assembly mandrel (33), it is ensured that the core (20), even if the Assembly mandrel (33) leaves the base opening (29) with its upper end, which cannot yet move in the radial direction.
  • the centering pin (27) should be so long that it - as shown in Figure 1 - emerges from the base opening (29), because only in this case it is ensured that the end that emerges can be used to connect the pot (19), core (20) and speaker basket (11).
  • the centering pin (27) should in any case have such a length that when the centering pin (27) is inserted into the corresponding centering hole (28) of the first annular disk (in FIG. 1 the annular disk 21), the lower edge (36 ) of the pot (19) has a small axial distance from the upper end (37) of the voice coil bobbin (18). This ensures that when the centering pin (27) is pushed into the centering hole (28) of the core (20), damage to the voice coil former (18) or the voice coil (17) arranged on it is excluded.
  • the overall length of the pin (27) should be so long that it already engages in the centering hole (28) of the pole disc (22) before the lower edge (36) of the pot (19) can come into contact with the upper end (37) of the voice coil bobbin (18).
  • FIG. 3 shows another type of design of a loudspeaker (10) shown in FIG. 1.
  • the loudspeaker basket (11) is formed on a para- or diamagnetic material.
  • the base (25) is provided with a centering pin (27).
  • this centering pin (27) is connected in one piece to the loudspeaker basket (11).
  • a core (20) which is formed only from a magnetic piece (21) and a pole disk (22), is pushed onto this centering pin (27) as a one-piece unit. The latter conditions are indicated by the arrow next to the core (20).
  • an oscillating unit (13) of the type shown in FIG. 2a is now inserted in the arrangement shown in FIG. 3 (not shown in FIG. 3), the magnet system (12) only has to be pushed on by pushing on the pot (19) (in FIG. 3 shown in dashed lines).
  • This pot (19) is also provided in Figure 3 with a centering hole (28 '). According to the arrow next to the pot (19), this is placed with the centering hole (28 ') on the centering pin (27) and the connection between the pot (19) and the centering pin (27) is established.
  • a centering sleeve (34) can also be placed between the core (20) and the voice coil former (18) in the arrangement shown in FIG. 3 by subsequently placing the pot (19).
  • the centering pin (27) according to FIG. 3 is formed from a para- or diamagnetic material, a better induction in the air gap (31) is achieved compared to the arrangement shown in FIG. 1, because in this case the material of the centering pin (27) does not weaken the induction provided by the magnet system (12) due to magnetic short circuits.
  • FIG. 4 shows a slightly modified pot (19) compared to FIG. 1.
  • This pot (19) is formed by a base plate (19 ') and a pot rim (19'').
  • the base plate (19 ') is connected to the pot rim (19'') by means of a circular ring (38) made of a para- or diamagnetic material in such a way that a narrow air gap (31') is created radially to the central axis.
  • a further voice coil carrier (18 ') is immersed in this air gap (31') and is wound with a voice coil (not shown in FIG. 4).
  • the upper end of the voice coil bobbin (18 ') is connected to a dome-shaped membrane (14'), which in turn is connected to the pot edge (19 '') by a peripheral bead (15 ') and a fastening edge (39).
  • the base plate (19 ') of the pot (19) is connected to a centering pin (27) by means of a screw.
  • This centering pin (27) is made of a para- or diamagnetic material, while the base plate (19) and the pot rim (19 '') are made of iron, for example.
  • FIG. 5 shows a design of a loudspeaker (10) similar to FIG. 3.
  • an oscillation unit (13) was also omitted in this representation.
  • the centering pin (27 ') which forms a unit with the loudspeaker basket (11), is not solid but hollow in FIG.
  • the inside diameter of the core (20 ') formed from three circular ring disks (21-23) is not uniformly large.
  • the inside diameter of the centering hole (28 ') in the pot (19) corresponds to the inside diameter of the pole disk (22), so that, since the inside diameter of the magnet pieces (21, 23) are smaller than the inside diameter of the pole disk (22), in the completed state of the Magnet system (12) between the base (25) and the pole disc (22) or between the pole disc (22) and the pot (19) incisions (40) are formed.
  • the outer casing of the high centering pin (27 ') is not designed to be smooth-walled, as in the other exemplary embodiments, but with Provide projections (41).
  • the projection (41.1) engages in the incision (40 ') when the magnet system (12) is completed.
  • the projection (41.2) also lies on the pot surface (42).
  • the projection (41.1) when a core (20 ') is pushed onto the centering pin (27'), acts as a fixation of the core (20 ') on the loudspeaker basket (11). If the respective centering and fastening work for the vibration system (13) (not shown in FIG.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
EP97107291A 1996-05-10 1997-05-02 Haut-parleur Withdrawn EP0806883A2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19618898 1996-05-10
DE19618898A DE19618898A1 (de) 1996-05-10 1996-05-10 Lautsprecher

Publications (1)

Publication Number Publication Date
EP0806883A2 true EP0806883A2 (fr) 1997-11-12

Family

ID=7793972

Family Applications (1)

Application Number Title Priority Date Filing Date
EP97107291A Withdrawn EP0806883A2 (fr) 1996-05-10 1997-05-02 Haut-parleur

Country Status (3)

Country Link
US (1) US5898786A (fr)
EP (1) EP0806883A2 (fr)
DE (1) DE19618898A1 (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004017674A1 (fr) * 2002-08-16 2004-02-26 Koninklijke Philips Electronics N.V. Haut-parleur a dome inverse
EP1781066A2 (fr) * 2005-10-27 2007-05-02 Pioneer Corporation Haut-parleur
CN104661161A (zh) * 2013-11-21 2015-05-27 哈曼国际工业有限公司 倒置式双线圈换能器

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CN100348074C (zh) * 1998-11-13 2007-11-07 戈德哈德A·冈瑟 用于稀土磁体扬声器的低成本马达结构
US8588457B2 (en) * 1999-08-13 2013-11-19 Dr. G Licensing, Llc Low cost motor design for rare-earth-magnet loudspeakers
US6654476B1 (en) 1999-08-13 2003-11-25 Godehard A. Guenther Low cost broad range loudspeaker and system
CN1239046C (zh) 2000-06-27 2006-01-25 G·A·格仑瑟 小型扬声器及系统
US6611606B2 (en) * 2000-06-27 2003-08-26 Godehard A. Guenther Compact high performance speaker
US6993147B2 (en) * 2000-08-14 2006-01-31 Guenther Godehard A Low cost broad range loudspeaker and system
US6636612B1 (en) * 2000-11-03 2003-10-21 Algo Sound, Inc. Speaker for use in confined spaces
GB2371165B (en) * 2001-01-16 2004-12-22 Kh Technology Magnet system for loudspeakers
CN100423612C (zh) 2001-08-10 2008-10-01 Pss比利时股份有限公司 具有三维振动膜的扬声器
US6647124B1 (en) * 2002-05-06 2003-11-11 Meiloon Industrial Co., Ltd. Loudspeaker with coaxial magnetic circuit for high-pitch sound and low-pitch sound
EP1790192A4 (fr) * 2004-09-09 2010-06-02 Godehard A Guenther Haut-parleurs et systemes
EP1659824A3 (fr) * 2004-11-18 2008-02-13 Pioneer Corporation Bobine mobile et haut-parleur utilisant une telle bobine mobile
US7706563B2 (en) * 2005-12-19 2010-04-27 Harman International Industries, Incorporated Concentric radial ring motor
US7894623B2 (en) * 2006-03-22 2011-02-22 Harman International Industries, Incorporated Loudspeaker having an interlocking magnet structure
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EP2389013A1 (fr) * 2010-05-20 2011-11-23 Harman Becker Automotive Systems GmbH Haut-parleur doté d'une structure d'aimant à interverrouillage
WO2014066696A1 (fr) 2012-10-25 2014-05-01 Picospray, Llc Système d'injection de carburant
US9485586B2 (en) 2013-03-15 2016-11-01 Jeffery K Permanian Speaker driver
WO2017197282A1 (fr) 2016-05-12 2017-11-16 Briggs & Stratton Corporation Injecteur de distribution de carburant
US10859073B2 (en) 2016-07-27 2020-12-08 Briggs & Stratton, Llc Reciprocating pump injector
US10947940B2 (en) 2017-03-28 2021-03-16 Briggs & Stratton, Llc Fuel delivery system
WO2020077181A1 (fr) 2018-10-12 2020-04-16 Briggs & Stratton Corporation Module électronique d'injection de carburant

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Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2004017674A1 (fr) * 2002-08-16 2004-02-26 Koninklijke Philips Electronics N.V. Haut-parleur a dome inverse
EP1781066A2 (fr) * 2005-10-27 2007-05-02 Pioneer Corporation Haut-parleur
EP1781066A3 (fr) * 2005-10-27 2009-08-12 Pioneer Corporation Haut-parleur
CN104661161A (zh) * 2013-11-21 2015-05-27 哈曼国际工业有限公司 倒置式双线圈换能器
EP2876898A3 (fr) * 2013-11-21 2015-07-08 Harman International Industries, Incorporated Transducteur à double bobine inversée
US9445201B2 (en) 2013-11-21 2016-09-13 Harman International Industries, Inc. Inverted dual coil transducer
CN104661161B (zh) * 2013-11-21 2020-01-21 哈曼国际工业有限公司 倒置式双线圈换能器

Also Published As

Publication number Publication date
DE19618898A1 (de) 1997-11-13
US5898786A (en) 1999-04-27

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