EP0936838A2 - Dispositif pour la reproduction d'information - Google Patents

Dispositif pour la reproduction d'information Download PDF

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Publication number
EP0936838A2
EP0936838A2 EP99103021A EP99103021A EP0936838A2 EP 0936838 A2 EP0936838 A2 EP 0936838A2 EP 99103021 A EP99103021 A EP 99103021A EP 99103021 A EP99103021 A EP 99103021A EP 0936838 A2 EP0936838 A2 EP 0936838A2
Authority
EP
European Patent Office
Prior art keywords
wall
walls
housing
magnet system
sandwich
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Withdrawn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
EP99103021A
Other languages
German (de)
English (en)
Other versions
EP0936838A3 (fr
Inventor
Wolfgang Prof. Dr.-Ing. Bachmann
Gerhard Dr.-Ing. Krump
Hans-Jürgen Dipl.-Phys. 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 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 Harman Audio Electronic Systems GmbH filed Critical Harman Audio Electronic Systems GmbH
Publication of EP0936838A2 publication Critical patent/EP0936838A2/fr
Publication of EP0936838A3 publication Critical patent/EP0936838A3/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Withdrawn legal-status Critical Current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
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/02—Casings; Cabinets ; Supports therefor; Mountings therein
    • H04R1/021—Casings; Cabinets ; Supports therefor; Mountings therein incorporating only one transducer
    • 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

Definitions

  • the invention is concerned with the realization of sound reproduction from devices for information reproduction, in particular with the improved use of space of such devices for sound reproduction.
  • housings of Devices for information reproduction to emit sound waves Such devices as radios, televisions, and telephones loudspeakers are also known to the person skilled in the art, so that on Details need not be discussed in more detail.
  • Loudspeakers are provided, which are used in the walls of the housing are.
  • These speakers are characterized in that essentially a magnet system, a speaker basket, a membrane and there is a voice coil. If the voice coil, which directly or via a voice coil former connected to the membrane, subjected to sound signals, the membrane is vibrated, which is then audible Tone sequences can be perceived. Is the membrane, which in the known arrangements exclusively for sound reproduction is responsible, set in vibration the counterforces necessary for the generation of vibrations provided that the magnet system by means of the speaker basket connected to the respective wall of the housing is. Such an arrangement, which is also the generic term originated from claim, is known for example from DE-A-4220637.
  • the membrane In order to produce or improve the vibration ability of the membrane, it is generally connected at its upper edge to the upper edge of the loudspeaker basket by means of an elastic bead. If the surface of the wall, which can accommodate one of the known loudspeakers, is predetermined, this means that the active membrane surface, that is to say that which can be used for sound radiation, is reduced by the surface area of the bead Since the known loudspeakers are also still connected to the loudspeaker basket with the wall of the housing in many cases, the active surface of the diaphragm shrinks further in relation to the available surface of the wall, since the fastening takes up space This is particularly disadvantageous in the case of woofers because they require relatively large beads to ensure a large diaphragm lift and because of the high weight of such systems, very stable connections between the loudspeaker frame and the wall by using woofers whose active membrane area is adapted to the given conditions by reducing the size.
  • the known speakers have the disadvantage that they have a round or oval shape when viewed from above and are therefore made of for this reason the available surfaces of the walls cannot fully use for sound reproduction.
  • the invention is therefore based on the object of sound reproduction arrangements for devices for information reproduction, which all provided by the device for information reproduction Can use surfaces for sound reproduction.
  • a bracket may be present, which the Side of the magnet system facing away from the wall with one of the walls of the device connects.
  • the respective wall is designed according to claim 4, leave medium and high frequency sound events transferred with it. It is essential that the light core layer shows an anisotropic elasticity behavior by a very small one in the direction of its largest surface area and high across the area just mentioned Has modulus of elasticity. Furthermore, the cover layers should be one have high expansion shaft speed.
  • the structure is particularly simple if according to claim 5 sandwich-shaped wall using one of the two Cover views connected to the frame, since the cover layers for have sufficient elasticity and other special ones Measures to fix such walls are unnecessary do.
  • cover layer for connection to the frame that faces the inside of the device can be the lateral distance between the frame and the Edge of the wall and which is used to manufacture the Vibration ability of the wall arranged in the frame is necessary is to be made very narrow since the required elastic connection over the length of the (rear) cover layer can be adjusted by using the (rear) top layer parts of the back of the frame spaced far from the wall or another wall can be connected.
  • this advantage also applies is given when the connection between the frame and the Wall not from the (rear) top layer, but by means of one or more separate connecting elements.
  • these fasteners take the form of a Leaf spring or a circumferential leaf spring.
  • Connecting elements are achieved that the wall is damping-free is articulated. It is also possible through connecting elements a damping-free, to realize articulated connection with tensile stress.
  • the fasteners are made of tensioned Fabric or film realized. But also through foam elements can be created by such connecting elements which realizes a damped articulated bracket is.
  • rib-shaped elements specified in claim 8 which is preferably attached to the surface of the wall are facing the inside of the device, a acoustic coordination of the wall can be achieved.
  • the latter is because of the increase in radiation resistance associated with the fins particularly advantageous when it applies particularly deep thanks to the sandwich-shaped wall Radiate frequencies. Since the rib-shaped elements are preferred only be formed on the surface of the wall, facing the inside of the device keeps the other Surface uniformity that is decisive for the appearance of the device.
  • the sandwich-shaped wall is not only to one of the walls of the device, but is a plurality of sandwich-shaped wall of the device formed as a one-piece element, the Structure of the device continues.
  • a the conventionally designed walls of the device also be provided with a bass reflex tube.
  • Fig. 1a is a section through a wall 10 of a device 11 (Fig. 4a).
  • This wall 10 is in the present Embodiment formed from a homogeneous plastic material.
  • the magnet system 13 is attached on the surface 12 of the wall 10, which the interior facing the device 11, the magnet system 13 is attached.
  • This magnet system 13, which vibrates the wall 10 is offset in the present case by a cup-shaped pole piece 14 with upper pole disk 14 ', a permanent magnet 15 and one on a voice coil 17 arranged voice coil 17 formed.
  • the one provided with the voice coil 17 is immersed Voice coil former 16 in between the cup-shaped Pol Culture 14 and the inserted into the cup-shaped pole piece 14 Permanent magnets 15 leave an air gap 18.
  • the edge 19 of the cup-shaped pole piece 14 and the free end 19 'of the voice coil bobbin 16 are connected directly to the wall 10. Becomes the voice coil 17 with sound signals from a sound signal source (not shown), the voice coil 17 and with her the wall 10 along the center line shown in Fig. 1a vibrated.
  • bracket 20 which wall 10 with the wall 10 facing away from the cup-shaped pole piece 14 connects.
  • This bracket 20 may not be present in another - not shown - embodiment, because in the here shown drive of the wall 10 the inertia of Magnet system 13 required for driving the voice coil 17 Provides opposing forces dynamically.
  • an unmodified wall 10 of a device 11 (Fig. 4a) can be used by means of a such wall 10 only low-frequency tones with satisfactory Play quality. This is due to the fact that such unmodified walls have a strongly dampening effect to have generated vibrations.
  • FIG. 1b A less damping arrangement is shown in Fig. 1b.
  • This Arrangement is largely with the arrangement shown in Fig. 1a identical, so that further explanations are dispensed with can be.
  • the edge fastening is released.
  • the wall 10 directly into the next Wall 10 '(not shown in Fig. 1a) merges shows the wall 10 immediately before they enter the adjacent wall 10 ' passes a bead-shaped transition 21.
  • This bead-shaped transition Transition 21 which in the present case is caused by a corresponding deformation the wall 10 formed during its manufacture was, can in another - not shown - embodiment also from a separate component, which with regard to the desired elasticity is optimized, be formed.
  • the bead-shaped transition 21 also be realized be that the locations of the wall 10, at which the Transition 21 is to be formed, treated with a plasticizer be the plastic material of the wall in 10 this Area takes its firmness.
  • bracket 20 is modified in Fig. 1b that the bracket 20 is not guided to the wall 10, which the or the magnet systems 13 carries, but with a wall 10 'is connected, which does not emit sound waves is determined.
  • This type of design of the bracket 20th it is ensured that the outgoing from the bracket 20 Damping effect is minimized.
  • the wall 10 ' would also be one driven by at least one magnet system 13 Wall, the corner area in which both walls 10, 10 'merge into one another, also as a separate frame 20' (Fig. 2) be trained. In this case it would be appropriate 1b, the two brackets 20 of the two walls 10, 10 ' to connect to the frame 20 '(Fig. 2).
  • a wall 10 shown, the sandwich built and which as such a wall part or forms a complete wall of a device 11 (Fig. 4).
  • This Walls 10 constructed in sandwich form have a light weight Core layer 22 and two outer layers 23.
  • the two cover layers 23 with two opposite one another Surfaces of the core layer 22 connected.
  • this Arrangement of the magnet system 13 integrated in the core layer 22 is indicated in Fig. 3. More details for this are those filed by the applicant on December 20, 1997 Document DE-A-19757097 removable.
  • the other cover layer 23 for hanging the wall 10 would have to be realized comparable and based on the length of the connection Elasticity ratios of the gap 24 'are increased, with which, given the space available, for sound radiation usable area of the wall 10 is reduced.
  • the (upper) cover layer 23 for direct or indirect suspension the wall 10 is a uniform surface design given the wall 10 in the region of the gap 24 '. The latter also applies if the suspension is not in use one or both cover layers 23, but using separate Connection elements or suspension means is realized.
  • the gap 24 ' is adjacent a gap 24 '', which is essentially from the edge 24, the Frame 20 'and the (rear) cover sheet is limited.
  • This Gap space 24 '' forms a Helmholtz resonator together with the gap 24 ' and as such can improve the sound of the radiate from the respective - sandwich-shaped - wall 10 Sound waves are used.
  • Fig. 3 which a sandwich-shaped wall 10 closer shows, has rib-shaped elements on the rear cover layer 23 25 on.
  • These rib-shaped elements 25, which also in Fig. 2 are indicated by the dashed lines are used for modification the radiation resistance provided by the wall 10.
  • the rib-shaped elements 25 are not necessary on the entire wall side must be uniform. Rather, an arrangement only in regions is also possible.
  • Fig. 4a is a device 11 for reproducing information in the Shape of a television set shown schematically.
  • the picture tube 26 and four are sandwich-shaped built-up walls suitable for sound radiation 10 arranged.
  • the representation according to FIG. 4a is the good one Utilization of the area of the (front) wall 10 '' for sound radiation removable.
  • the other walls can also be used 10 '' 'can be used for sound radiation by this Walls 10 '' 'formed in accordance with FIGS. 1a, 1b or 2 become. The latter is indicated by the dashed lines.
  • walls 10 '' which are not (front) walls 10 '' are also designed to be foldable. The latter is in Fig. 4a indicated for the left (side) wall 10 ''.
  • FIG. 4b also shows a device 11 for information reproduction in the form of a television in a schematic representation.
  • this is Housing 27 of the device 11 is formed in two parts.
  • the withdrawn Part 27 '' of the housing 27, which consists of one piece corresponding to the representations of FIGS. 2 and 3 as a sandwich Wall 10 constructed with a U-shaped contour and can thus used overall for sound radiation.
  • the other part 27 'of the housing 27 is an injection molded part and serves among other things as a support for the picture tube 26 and the rest of the electronics (not shown).
  • the (front) wall also bears 10 '' of this part 27 'also two suitable for sound radiation and sandwich-shaped walls 10.
  • Below the Picture tubes 26 are two bass reflex tubes in the (front) wall 10 '' 28 used. Is part 27 '' in the direction of the arrow on the Part 27 'put on and the connection between the two parts 27 'and 27' ', there is a bass reflex arrangement, since in this case also the inside of the housing 27 of the walls 10 emitted sound waves for sound generation be used.

Landscapes

  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Details Of Audible-Bandwidth Transducers (AREA)
  • Stereophonic System (AREA)
EP99103021A 1998-02-17 1999-02-16 Dispositif pour la reproduction d'information Withdrawn EP0936838A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE1998106509 DE19806509B4 (de) 1998-02-17 1998-02-17 Gerät zur Informationswiedergabe
DE19806509 1998-02-17

Publications (2)

Publication Number Publication Date
EP0936838A2 true EP0936838A2 (fr) 1999-08-18
EP0936838A3 EP0936838A3 (fr) 2005-01-19

Family

ID=7857997

Family Applications (1)

Application Number Title Priority Date Filing Date
EP99103021A Withdrawn EP0936838A3 (fr) 1998-02-17 1999-02-16 Dispositif pour la reproduction d'information

Country Status (2)

Country Link
EP (1) EP0936838A3 (fr)
DE (1) DE19806509B4 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807936A1 (fr) 2000-04-20 2001-10-26 Sofradim Production Renfort de paroi abdominale pour le traitement des hernies inguinales par voie anterieure sans tension

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022370A1 (de) * 1990-07-13 1992-01-16 Nokia Unterhaltungselektronik Integrierte fernsehlautsprecherbox
CA2230075A1 (fr) * 1995-09-02 1997-03-13 Neil Harris Visuel dote de haut-parleurs
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique

Family Cites Families (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1132593B (de) * 1965-04-05 1962-07-05 Bolt Beranek & Newman Akustisch wirksame Platte, insbesondere zur Ankopplung an einen elektroakustischen Wandler
DE1998134U (de) * 1968-03-22 1968-12-12 Sel Ag Lautsprechsystem
DE7139610U (de) * 1971-10-20 1972-02-03 Hossbach E Lautsprecher und/oder lautsprecher-kombinationsbild
DE7818718U1 (de) * 1978-06-22 1978-12-14 Stockmann, Guenther, 3079 Warmsen Schallwand fuer lautsprecher
DE8702418U1 (fr) * 1987-02-17 1987-06-25 Laiss, Wolfgang, 7804 Glottertal, De
KR910007182B1 (ko) * 1987-12-21 1991-09-19 마쯔시다덴기산교 가부시기가이샤 스크리인장치
DE3832617A1 (de) * 1988-09-26 1990-03-29 Electronic Werke Deutschland Lautsprecher fuer ein digitales steuersignal
DE4107298C2 (de) * 1991-03-07 1994-08-25 Werner E J Mueller Akustischer Kugelstrahler erster Ordnung
DE4220637A1 (de) * 1992-06-24 1994-01-05 Nokia Deutschland Gmbh Lautsprecheranordnung für Fernsehgeräte
DE19542147A1 (de) * 1995-11-11 1997-05-15 Deutsche Telekom Ag Verfahren zur lokalen Verknüpfung von optischen und akustischen Signalen

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE4022370A1 (de) * 1990-07-13 1992-01-16 Nokia Unterhaltungselektronik Integrierte fernsehlautsprecherbox
CA2230075A1 (fr) * 1995-09-02 1997-03-13 Neil Harris Visuel dote de haut-parleurs
WO1997009842A2 (fr) * 1995-09-02 1997-03-13 New Transducers Limited Dispositif acoustique

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2807936A1 (fr) 2000-04-20 2001-10-26 Sofradim Production Renfort de paroi abdominale pour le traitement des hernies inguinales par voie anterieure sans tension

Also Published As

Publication number Publication date
DE19806509A1 (de) 1999-08-19
EP0936838A3 (fr) 2005-01-19
DE19806509B4 (de) 2007-12-13

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