EP0924960B1 - Suspension pour des arrangements de reproduction sonore selon le principe des ondes de flexion - Google Patents

Suspension pour des arrangements de reproduction sonore selon le principe des ondes de flexion Download PDF

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Publication number
EP0924960B1
EP0924960B1 EP98123818A EP98123818A EP0924960B1 EP 0924960 B1 EP0924960 B1 EP 0924960B1 EP 98123818 A EP98123818 A EP 98123818A EP 98123818 A EP98123818 A EP 98123818A EP 0924960 B1 EP0924960 B1 EP 0924960B1
Authority
EP
European Patent Office
Prior art keywords
panel
openings
suspension
cover layers
core layer
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.)
Expired - Lifetime
Application number
EP98123818A
Other languages
German (de)
English (en)
Other versions
EP0924960A2 (fr
EP0924960A3 (fr
Inventor
Wolfgang Bachmann
Gerhard Krump
Hans-Jürgen Regl
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.)
Harman Becker Automotive Systems GmbH
Original Assignee
Harman Becker Automotive Systems 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 Harman Becker Automotive Systems GmbH filed Critical Harman Becker Automotive Systems GmbH
Publication of EP0924960A2 publication Critical patent/EP0924960A2/fr
Publication of EP0924960A3 publication Critical patent/EP0924960A3/fr
Application granted granted Critical
Publication of EP0924960B1 publication Critical patent/EP0924960B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/16—Mounting or tensioning of diaphragms or cones
    • H04R7/18—Mounting or tensioning of diaphragms or cones at the periphery
    • H04R7/20—Securing diaphragm or cone resiliently to support by flexible material, springs, cords, or strands
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2307/00—Details of diaphragms or cones for electromechanical transducers, their suspension or their manufacture covered by H04R7/00 or H04R31/003, not provided for in any of its subgroups
    • H04R2307/207—Shape aspects of the outer suspension of loudspeaker diaphragms

Definitions

  • the invention relates to a suspension for sound reproduction devices according to the bending wave principle with a panel which is formed by a core layer and two cover layers, wherein the two cover layers are connected to two opposing surfaces of the core layer, with a holder and with elastic fastening means which the panel with connect the holder, wherein the elastic fastening means of the core layer and / or at least one of the two outer layers is formed.
  • Such arrangements are for example from the GB-A-1 003 608 , of the JP 56-112197 A and the DE 21 12 516 B known.
  • Characteristic of such sound reproduction arrangements is that a "bending wave radiation" is possible from a critical lower cutoff frequency, wherein the bending waves along the plane of the respective panel lead to a sound emission with frequency-dependent direction.
  • a section through a created directional diagram shows a main lobe whose direction is frequency-dependent.
  • the panel is constructed according to the sandwich principle in that two opposing surfaces of a very light core layer are each connected to a thin cover layer, for example by gluing.
  • the material for the cover layer must have a particularly high expansion shaft speed.
  • Suitable cover layer materials are, for example, thin metal foils or else fiber-reinforced plastic foils.
  • the core layer special requirements are made. Thus, it is necessary that the usable materials initially have a low mass density and low attenuation. In addition, the materials for the core layer must have the highest possible shear modulus perpendicular to the surfaces that are provided with the cover layers. Finally, it is necessary in the sense of a main requirement that the materials which can be used for core layers have a very low modulus of elasticity in the direction in which later the respective core layer formed from this material has its greatest extent.
  • rigid foams can also be used as core layer materials because, despite their isotropic material properties, they still have suitable shear and elasticity modules. Not to mention in this context is that when using rigid foams as a material for the core layer, the outer layers have the task of producing the required anisotropic behavior of the panel.
  • the invention has the object to provide a suspension for sound reproduction devices according to the bending wave principle, which avoids the disadvantages existing in the prior art.
  • the inventive merit of the present application is to have recognized that the components used for the production of the panel are suitable for producing an elastic connection with a holder.
  • the core layer has a hole structure, each breakthrough of this hole structure perpendicular to the two outer layers, and is to realize a fastening of the panel with the holder inserted through at least one of the openings a fastening part, the already elastic hole structure of the core material used for elastic attachment be, if at least one of the two outer layers to the or provided with the fastening part breakthrough or breakthrough adheres to a lateral distance A1, by a plurality of provided with the fastening part openings laterally immediately adjacent openings not from the or the outer layers are covered. Whether in this case the respective fastening part runs parallel or transversely to the direction of the openings, is irrelevant.
  • the perforations or breakthroughs provided with the fastening part and / or the apertures, which are adjacent to the apertures or openings provided with the fastening part can be foamed with a plastic material be.
  • At least one of the two cover layers can also maintain a distance A2 to the openings filled with plastic material.
  • a further improved spring action is achieved when the one or more openings, which receive a fastening part, and / or such openings, which are not or only covered with one of the two cover layers, compared to the openings in the remaining core layer have a reduced length.
  • the sound reproduction device is when the electronic components are arranged to drive the panel at a distance A between the bracket and the panel. If the electronic components are connected to the bracket, they will not increase the oscillating mass. In addition, the attachment of the electronic components to the holder provides for improved heat dissipation from the electronic components
  • the respective panel can also be fastened by means of a combination of core layer and cover layer suspension, for example by guiding one of the cover layers to the support and supporting the panel remotely from the edge region with the cooperation of the core layer.
  • FIG. 1 shown in plan view panel 10 is of a core layer 11, an upper cover layer 12.1 and a in FIG. 1 invisible lower cover layer 12.2 formed, wherein the two cover layers 12 are connected to each other at opposite surfaces of the core layer 11 with this.
  • the core layer 11 has a hole structure, which in the present case is formed by a plurality of openings 20 with a honeycomb-shaped cross-section.
  • the honeycomb-shaped openings 20 extend perpendicular to the planes of their largest extent having the two outer layers 12th
  • apertures 20 shown in the embodiments all have a honeycomb-shaped cross-section, there is no restriction on this cross-sectional shape. This means that in other embodiments, the apertures 20 may also have round or square cross-sections.
  • FIG. 1 is clearly removed, the core layer 11 is not completely covered with the two cover layers 12. Rather, a region 13 is left uncovered in the two cover layers 12, through which the core layer 11 is visible.
  • a fastening part in the form of a screw 14 is inserted in the middle (the in FIG. 1 visible) openings 20, a fastening part in the form of a screw 14 is inserted.
  • the head 15 of the screw 14 is located on the core layer 11.
  • a washer-for example made of foam may be arranged between the core layer 11 and the head 15 of the screw 14 also a washer-for example made of foam (not shown) may be arranged. Also is FIG.
  • FIG. 2 can be removed by the indicated puncturing that the opening 20, through which the shaft 16 of the screw 14 extends, is foamed with a plastic material. This prevents this opening 20 from being damaged when the shaft 16 of the screw 14 is connected to a bracket (not shown) and the panel 10 is deformed wave-like.
  • sectional view is according to FIG. 2 can be removed that in order to improve the spring action of the core layer of the region 13 in the lower cover layer 12.2 both to the screw 14 a distance A1 and to the foaming a distance A2 complies. It is essential that the distance A1 is greater than the distance A2, because only if these conditions, a free spring action is ensured by utilizing the core layer 11.
  • FIGS. 3a-c is one of the suspension according to the Figures 1 and 2 completely different suspension illustrated, although both types of suspension can also be combined to hang a panel 10 can be used.
  • the panel 10 is bordered by a bracket 17 at a lateral distance A.
  • This holder 17 is presently designed as a U-profile, with the free legs 18 of this profile in the direction of the panel 10 show.
  • the two cover layers 12.1, 12.2 connected to the core layer 11 span the distance A flat and are connected to the legs 18 of the profile.
  • the legs 18 can also have a toothed contour (not shown).
  • the corresponding cover layer 12 is placed on a serrated leg 18 of the circumferential support 17 and pressed by means of a complementary toothed tool on the leg 18, a Stress in the cover layer 12 constructed, which is maintained, for example, after setting of the adhesive between leg 18 and cover layer 12.
  • FIGS. 3b and c can be taken that the two cover layers 12 need not be performed in the plane of the panel to the bracket 17, but in the area in which they span the distance A also curved ( FIG. 3b ) or jagged ( Figure 3c ) may be formed. Also, the curvature or zigzagging of the cover layers 12 in the region of the distance A is not limited to a curvature or serration. It should also be noted that the shape, the thickness and the material properties of the cover layers 12.1, 12.2 decide on the spring properties. Finally, it should be added that it is not necessary for both outer layers 12. 1, 12. 2 of a panel 10 to be connected to the holder 17.
  • an electronics which cooperates with the drive or the drive systems (not shown) for the panel 10.
  • This electronics 19 is connected to the holder 17, whereby a good heat dissipation from the panel 10 is achieved.
  • the embodiment according to FIG. 4 Ties to the embodiment according to the Figures 1 and 2 at.
  • the fastening part in the form of a tab 14 ' is connected transversely to the extension direction of the openings 20 to the panel 10.
  • the apertures 20 'to 20 "' are provided neither with an upper nor with a lower cover layer 12.1, 12.2, in order to improve the mobility of the apertures 20" and 20 '''transversely to their extension direction.
  • Nachzutragen remains in connection with the embodiment according to FIG. 4 only that the distances shown A1 and A2 not only transverse to the direction of this figure but perpendicularly apply.
  • the clip 14' can be designed to be elastic at a distance A 'between the panel and the mount 17 in another embodiment (not shown).

Landscapes

  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Building Environments (AREA)
  • Body Structure For Vehicles (AREA)
  • Laminated Bodies (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)

Claims (7)

  1. Suspension pour des dispositifs de reproduction sonore selon le principe des ondes de flexion, comprenant un panneau (10) qui est formé d'une couche centrale (11) et de deux couches extérieures (12.1, 12.2), dans laquelle les deux couches extérieures (12) sont reliées à deux surfaces de la couche centrale (11) opposées l'une à l'autre,
    comprenant un support (17), et
    comprenant des moyens de fixation élastiques, qui relient le panneau (10) au support (17), où les moyens de fixation élastiques sont formés par la couche centrale (11) et/ou au moins une des deux couches extérieures (12),
    caractérisée en ce que
    la couche centrale (11) présente une structure perforée qui contient des perforations, où chaque perforation (20) de cette structure perforée s'étend perpendiculairement aux deux couches extérieures (12),
    pour réaliser une fixation du panneau (10) avec le support (17), une pièce de fixation (14, 14') est enfoncée dans au moins une des perforations (20) et
    au moins une des deux couches extérieures (12) se trouve à une distance latérale (A1) par rapport à la perforation ou aux perforations (20) abritant la pièce de fixation (14), en faisant en sorte qu'une majorité des perforations (20) latéralement immédiatement adjacentes à la perforation ou aux perforations (20) contenant la pièce de fixation (14) ne soient pas recouvertes par la ou les couches extérieures (12).
  2. Suspension selon la revendication 1,
    caractérisée en ce que
    la ou les perforations (20) qui abritent la pièce de fixation (14) et/ou les perforations (20) qui sont latéralement adjacentes à la perforation ou aux perforations (20) abritant la pièce de fixation (14) sont remplies d'une matière plastique foisonnée.
  3. Suspension selon la revendication 2,
    caractérisée en ce qu'
    au moins une des deux couches extérieures (12) se trouve également à une distance (A2) par rapport aux perforations (20) remplies de matière plastique foisonnée.
  4. Suspension selon l'une des revendications 1 à 3,
    caractérisée en ce que
    la ou les perforations (20) qui renferment une pièce de fixation (14) et/ou les perforations (20) qui ne sont pas recouvertes ou sont recouvertes seulement par une des deux couches extérieures (12) présentent une longueur réduite (L2) par rapport à la longueur (L1) des perforations (20) dans la couche centrale restante (11).
  5. Suspension selon la revendication 1,
    caractérisée en ce que
    le support (17) entoure le panneau (10) à une distance latérale (A) et en ce qu'au moins une des deux couches extérieures (12) est reliée au support (17) en passant au-dessus de la distance latérale (A).
  6. Suspension selon la revendication 5,
    caractérisée en ce que
    les zones des couches extérieures (12) qui passent par-dessus la distance latérale (A) pour rejoindre le support (17) présentent un contour ondulé ou en zigzag.
  7. Suspension selon la revendication 5 ou 6,
    caractérisée en ce que
    des composants électroniques (19) pour commander le panneau (10) sont disposés dans la distance latérale (A) séparant le panneau (10) et le support (17) et sont reliés au support (17).
EP98123818A 1997-12-20 1998-12-15 Suspension pour des arrangements de reproduction sonore selon le principe des ondes de flexion Expired - Lifetime EP0924960B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19757098 1997-12-20
DE19757098A DE19757098C2 (de) 1997-12-20 1997-12-20 Aufhängung für Schallwiedergabeanordnungen nach dem Biegewellenprinzip

Publications (3)

Publication Number Publication Date
EP0924960A2 EP0924960A2 (fr) 1999-06-23
EP0924960A3 EP0924960A3 (fr) 2005-04-13
EP0924960B1 true EP0924960B1 (fr) 2009-11-25

Family

ID=7852892

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98123818A Expired - Lifetime EP0924960B1 (fr) 1997-12-20 1998-12-15 Suspension pour des arrangements de reproduction sonore selon le principe des ondes de flexion

Country Status (4)

Country Link
US (1) US6160898A (fr)
EP (1) EP0924960B1 (fr)
JP (1) JPH11252684A (fr)
DE (2) DE19757098C2 (fr)

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US9788122B2 (en) * 2012-12-26 2017-10-10 Xin Min HUANG Vibrating panel device for electromagnetic vibrator and manufacture method thereof
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Also Published As

Publication number Publication date
JPH11252684A (ja) 1999-09-17
DE59814416D1 (de) 2010-01-07
DE19757098A1 (de) 1999-06-24
EP0924960A2 (fr) 1999-06-23
DE19757098C2 (de) 2003-01-09
EP0924960A3 (fr) 2005-04-13
US6160898A (en) 2000-12-12

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