EP0924957A2 - Contacts de connexion - Google Patents

Contacts de connexion Download PDF

Info

Publication number
EP0924957A2
EP0924957A2 EP98123816A EP98123816A EP0924957A2 EP 0924957 A2 EP0924957 A2 EP 0924957A2 EP 98123816 A EP98123816 A EP 98123816A EP 98123816 A EP98123816 A EP 98123816A EP 0924957 A2 EP0924957 A2 EP 0924957A2
Authority
EP
European Patent Office
Prior art keywords
core layer
conductive
panel
cover layers
terminal contact
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.)
Granted
Application number
EP98123816A
Other languages
German (de)
English (en)
Other versions
EP0924957A3 (fr
EP0924957B1 (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 Audio Electronic Systems GmbH
Original Assignee
Nokia Technology GmbH
Harman Audio Electronic 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 Nokia Technology GmbH, Harman Audio Electronic Systems GmbH filed Critical Nokia Technology GmbH
Publication of EP0924957A2 publication Critical patent/EP0924957A2/fr
Publication of EP0924957A3 publication Critical patent/EP0924957A3/fr
Application granted granted Critical
Publication of EP0924957B1 publication Critical patent/EP0924957B1/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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/06—Arranging circuit leads; Relieving strain on circuit leads
    • 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
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/04—Plane diaphragms
    • H04R7/06—Plane diaphragms comprising a plurality of sections or layers

Definitions

  • the invention is concerned with the connection contact of sound reproduction arrangements, which work on the principle of flexible shafts.
  • Such arrangements are essentially formed by a panel and at least one drive system, the panel being set in vibration when low-frequency sound signals are supplied to the drive system (s). It is characteristic of such sound reproduction arrangements that "bending wave radiation" becomes possible from a critical lower limit frequency, the bending waves leading along the plane of the respective panel to sound radiation with a frequency-dependent direction. In other words, a section through a directional diagram shows a main lobe, the direction of which is frequency-dependent.
  • the panel is built on the sandwich principle, by two each other opposite surfaces of a very light core layer each with a thin cover layer are connected for example by gluing. So that Panel has good sound reproduction properties, the material for the Top layer have a particularly high expansion shaft speed. Suitable Cover layer materials are, for example, thin metal foils or fiber-reinforced plastic films.
  • the core layer will also be special Requirements because this layer must be towards the two Surfaces that are covered with the cover foils have a very high and in Direction parallel to the surfaces coated with the cover foils have very low modulus of elasticity.
  • This anisotropic behavior of the Core layer is achieved in that the core layer, for example, a Honeycomb structure, in which the walls forming the honeycomb run perpendicular to the two outer layers. As suitable materials for the honeycomb structure of the core layer have become light metals and fiber reinforced Proven plastics. It is also possible to use rigid foams for the core layer insofar as this runs between the two cover layers Have breakthroughs.
  • the invention has for its object a connection for Sound reproduction arrangements according to the bending wave principle indicate which is very easy to implement, strong on the bending wave propagation has reduced damping influence and voltage losses due to high avoids contact resistance.
  • the basic idea of the present invention is that of forming the panel Components for connecting the voice coil and sound signal source to use, because it was found that the cover layers and / or the core layer works extremely well as power supplies for the Have the voice coil inserted if the core layer or at least one of the Cover layers has conductive areas.
  • the two cover layers covering the core layer can be used as conductive areas if these are made of electrical Electrically conductive material are made and made of a core layer from a Isolator are separated from each other.
  • the use of two top layers, which are made entirely of the conductive material also has the additional advantage that when using a plurality of drive systems no separate power supplies for the individual drive systems per panel must be provided. Rather, it is for the electrical connection of the respective drive system, only the respective connections of this Drive system to connect with one of the two cover layers. Also at This type of contacting of drive systems offers great flexibility in Arrangement of drive systems in or on the panel achieved because at No changes to the arrangement points of the different drive systems Redesign of the power supply must be created.
  • a cover layer is made of a conductive Material necessary if the top layer in at least two of each other isolated segment is divided.
  • the core layer can also be used as a power supply if it has conductive areas.
  • the core layer has a perforated structure and is Core layer formed from an insulator
  • these breakthroughs can also be very simply used for signal line if these breakthroughs are in accordance Claim 7 are equipped with a conductor with the respective conductive Area is connected.
  • Such conductors are not based on the respective breakthroughs filling conductive plastics is limited, but can also be massive Wires, because the routing of the wires in the openings ensures the bend the core layer 11 is not hindered transversely to its greatest extent.
  • the core layer of a plurality of narrow strips is formed, with each strip, which another strip is arranged next to, with this over a plurality of mutually spaced and towards Narrow side of the soap-passing joints is connected and where the unconnected areas of the strips are spaced from one another, and at least one of these strips is formed from a conductive material, can create conductive areas in the core layer without any special effort to be provided.
  • the supply of sound signals to the panel is particularly easy if according to claim 9, the panel surrounded by a bracket and with this connected is. It is particularly advantageous if the fastening means with which the panel is connected to the bracket, at the same time a conductive Connection between the fixed on the bracket Terminals and respective conductive area of the top layer and / or Create core layer.
  • a panel which consists of a core layer 11 and a upper and a lower cover layer 12.1, 12.2 is formed.
  • the two Cover layers 12 are on two opposite surfaces of the core layer 11 connected to this.
  • the schematic representation of Figure 1 is it can be seen that the core layer 11 has openings 13 Hole structure. The openings 13 run vertically between the two cover layers 12. Only for the sake of completeness it should be noted that the core layer 11 also in other — not shown — exemplary embodiments can be made entirely of a rigid foam.
  • a voice coil former 14 is inserted into the core layer 11, wherein the free end 15 of which protrudes from the panel 10.
  • the free end is 15 of the voice coil bobbin 14 is provided with a voice coil 16. Only the For the sake of completeness, it should be pointed out that with a ready-to-use Panel 10, the free end 15 of the voice coil former 14 and voice coil 16th is connected to a drive system (not shown).
  • the wire ends, not shown, but necessary for energizing the voice coil 16 are each connected to a conductive area 17.1, 17.2. in the In the embodiment shown in Figure 1, the two conductive Areas 17.1, 17.2 formed from wires, each between the lower Cover layer 12.2 and the core layer 11 run. Even in one can not illustrated embodiment, the conductive areas 17 or wires in corresponding milling in the core layer 11 may be arranged. Will the mentioned wires used as conductive areas 17, these should however in elastic material are stored so-called and as a result of the bend of the panel 10 possibly occurring under operating conditions Avoid “wire buzzers". Because of the improved physical contact the latter measures are superfluous if the in the embodiment according to Figure 1 wires through conductive areas 17 in the form of conductive foils are formed on the core layer 11 facing Laminated side of the lower cover layer 12.2.
  • conductive areas 17 are also formed by solid wires or thorns, which are inserted into the core layer 11 from the narrow side thereof.
  • the Voice coil 16 is flexible with the conductive areas 17 according to FIG. 2 Wires 18 electrically connected.
  • Figure 3 is a plan view of a core layer 11 is shown, the die Core layer 11 covered cover layers 12 were omitted. This The illustration also illustrates the hole structure of the core layer 11, which in the present case of a plurality of openings which are honeycomb-shaped in cross section 13 is formed.
  • Such hole structures are formed so that a plurality of narrow strips can be stacked on top of each other.
  • Each stripe is on another strip is stacked with a plurality of each other spaced and extending towards the formwork side of the strip
  • connection points usually in the form of adhesive beads. are all strips are stacked and connected one above the other in this way the stack is pulled apart, which results in the hole structure shown in FIG the core layer 11 results.
  • Figure 3 is exemplary of six of the shown Breakthroughs 13 'shown the connection of two strips 19', 19 ", the respective connection points between the two strips 19 ', 19 "with a X are marked.
  • strips 19 are shown in the embodiment according to FIG. 3, which are shown in solid lines. These strips 19 are made of one formed conductive material and form the conductive areas 17.1, 17.2 Core layer 11. In connection with the last paragraph it becomes clear that by using at least one strip 19 of conductive material Conductive areas 17 in the core layer 19 very easily and without changing the Production can be realized. Deviating from Figure 3 only one Strip 19 of conductive material in the core layer 11 corresponding to the The last paragraph incorporated into the core layer must be used to contact the Voice coil 16 can be ensured that this one stiffener 19 in two sub-areas isolated from one another is split.
  • the voice coil occurs perpendicular to the paper plane 16 out.
  • the respective wire ends (not shown) of the voice coil 16 are each via one of the two contact points 20 made of conductive Material manufactured- strips 19 connected.
  • the voice coil 16 an axial distance from Has core layer 11, the connection between the voice coil 16 and the Stiffeners according to FIG. 3 via a corresponding conductor (not shown) be made.
  • the opening 13, from which the not shown conductor is led out with a conductive plastic be foamed.
  • the connection between the conductor and the conductive Plastic can be implemented as a plug connection by the in the plastic is only plugged in.
  • FIG. 4 shows a panel 10 in which the voice coil 16 is inside the core layer 11 is arranged.
  • the core layer 11 which is made of an insulator, a recess 21 is formed was and the voice coil 16 with the openings 13 forming Walls 22 is connected.
  • the voice coil 16 is by means of flexible wires 18 with the conductive areas 17.1, 17.2 connected, which in the present case is made of conductive material Cover layers 12.1, 12.2 are formed.
  • the flexible wire 18, which connects the voice coil 16 to the top cover layer 12.1 one of the openings 13 out.
  • the flexible wire 18 receiving in each case Breakthrough 13 can also be foamed with an elastic material. Since the Voice coil 16 must be inserted into the recess 21 before at least the lower cover layer 12.2 is connected to the core layer 11 is the Connection between the flexible wire 18 and the lower cover layer 12.2 solved so that the wire 18 penetrates (indicated by the cover layer 12.2 through the wire end shown in dashed lines) and by means of the contact point 20 with the side of the lower cover layer 12.2 facing away from the core layer 11 for example is soldered.
  • the conductive areas 17 exclusively from the upper cover layer 12.1.
  • the top cover layer 12.1 is separated from one another isolated segments 26 divided.
  • the resultant between segments 26 Gap 27 is closed with a cover strip 28, which - like the Core layer 11- is made of an insulating material.
  • the contacting between the two segments 26 and the voice coil 16 is as in the Embodiment according to Figure 5 by foaming with conductive Plastic material 24 realized.
  • Figure 7 shows the edge 29 of a panel 10.
  • a holder 30 made of insulating material, which in the present case is a U-shaped one Has contour.
  • the two cover layers 12, which are connected to the core layer 11 are connected, are guided up to the holder 30 and thereby span the Distance A.
  • the two cover layers 12 in the present embodiment Form conductive areas 17 (approximately according to Figure 5) is by the leadership of two cover layers 12 up to the holder 30 simultaneously a conductive Connection between the vibratable panel 10 and the stationary bracket 30 realized without much additional effort.
  • a fastening of a panel 10 is also shown in FIG.
  • To make the A web 31 serves to connect the edge 29 and the holder 30, which is made of conductive material and into the core layer 11 inserted and fastened.
  • the attachment of the web 31 is realized so that the Breakthrough 13, which is completely penetrated by the web 31, with a Plastic material is filled.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Audible-Bandwidth Dynamoelectric Transducers Other Than Pickups (AREA)
  • Communication Cables (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
EP98123816A 1997-12-20 1998-12-15 Contacts de connexion Expired - Lifetime EP0924957B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE19757099 1997-12-20
DE19757099A DE19757099A1 (de) 1997-12-20 1997-12-20 Kontaktierung für eine Schallwiedergabeanordnung nach dem Biegewellenprinzip

Publications (3)

Publication Number Publication Date
EP0924957A2 true EP0924957A2 (fr) 1999-06-23
EP0924957A3 EP0924957A3 (fr) 2005-01-05
EP0924957B1 EP0924957B1 (fr) 2005-11-30

Family

ID=7852893

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98123816A Expired - Lifetime EP0924957B1 (fr) 1997-12-20 1998-12-15 Contacts de connexion

Country Status (4)

Country Link
US (1) US6560348B1 (fr)
EP (1) EP0924957B1 (fr)
JP (1) JPH11252677A (fr)
DE (2) DE19757099A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6347149B1 (en) 1998-05-15 2002-02-12 Harman Audio Electronic Systems Gmbh Driver for a flat acoustic panel

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19821862A1 (de) * 1998-05-15 1999-11-18 Nokia Deutschland Gmbh Schallwiedergabeanordnung
DE19825866A1 (de) 1998-06-10 1999-12-16 Nokia Deutschland Gmbh Plattenlautsprecher
DE19843079A1 (de) 1998-09-19 2000-03-23 Nokia Deutschland Gmbh Multiresonanzplatte
DE10001410C2 (de) * 2000-01-14 2001-12-06 Harman Audio Electronic Sys Flachlautsprecheranordnung
TW510139B (en) * 2001-01-26 2002-11-11 Kirk Acoustics As An electroacoustic transducer and a coil and a magnet circuit therefor
WO2004080118A1 (fr) * 2003-03-07 2004-09-16 Koninklijke Philips Electronics N.V. Haut-parleur a onde de flexion
CN1954639B (zh) * 2004-05-14 2012-12-05 索尼昂荷兰有限公司 双隔膜电声换能器
PE20181440A1 (es) 2015-09-14 2018-09-12 Wing Acoustics Ltd Mejoras en o relacionadas con los transductores de audio
WO2018167538A1 (fr) 2017-03-15 2018-09-20 Wing Acoustics Limited Améliorations apportées ou se rapportant à des systèmes audio
TW201904310A (zh) 2017-03-22 2019-01-16 紐西蘭商威恩音響有限公司 有關於聲頻轉換器、薄型電子裝置及鉸鏈系統的系統、方法及裝置
US11317212B2 (en) * 2020-09-12 2022-04-26 Matthew Otis Flat panel horn loudspeaker
WO2022121590A1 (fr) * 2020-12-09 2022-06-16 青岛海信激光显示股份有限公司 Panneau de génération sonore et écran de projection
CN112543398B (zh) * 2020-12-09 2023-03-14 青岛海信激光显示股份有限公司 发声板及投影屏幕

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US4465905A (en) * 1982-04-28 1984-08-14 International Jensen Incorporated Loudspeaker assembly
EP0720415A2 (fr) * 1994-12-28 1996-07-03 Kabushiki Kaisha Kenwood Composant de haut-parleur, haut-parleur, et procédé de sa fabrication

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4322583A (en) * 1978-11-20 1982-03-30 Sony Corporation Voice coil bobbin connection to loudspeaker diaphragm of honeycomb core sandwiched by sheets
US4465905A (en) * 1982-04-28 1984-08-14 International Jensen Incorporated Loudspeaker assembly
EP0720415A2 (fr) * 1994-12-28 1996-07-03 Kabushiki Kaisha Kenwood Composant de haut-parleur, haut-parleur, et procédé de sa fabrication

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6347149B1 (en) 1998-05-15 2002-02-12 Harman Audio Electronic Systems Gmbh Driver for a flat acoustic panel

Also Published As

Publication number Publication date
DE19757099A1 (de) 1999-06-24
JPH11252677A (ja) 1999-09-17
US6560348B1 (en) 2003-05-06
DE59813242D1 (de) 2006-01-05
EP0924957A3 (fr) 2005-01-05
EP0924957B1 (fr) 2005-11-30

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