EP0185833A1 - Membran aus Kunststoff für Lautsprecher - Google Patents

Membran aus Kunststoff für Lautsprecher Download PDF

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Publication number
EP0185833A1
EP0185833A1 EP84830355A EP84830355A EP0185833A1 EP 0185833 A1 EP0185833 A1 EP 0185833A1 EP 84830355 A EP84830355 A EP 84830355A EP 84830355 A EP84830355 A EP 84830355A EP 0185833 A1 EP0185833 A1 EP 0185833A1
Authority
EP
European Patent Office
Prior art keywords
membrane
loudspeakers
plastic materials
mould
fact
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Withdrawn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
EP84830355A
Other languages
English (en)
French (fr)
Inventor
Alberto Nerozzi
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.)
Audiotecnica Italina Srl
Original Assignee
Audiotecnica Italina Srl
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 Audiotecnica Italina Srl filed Critical Audiotecnica Italina Srl
Priority to EP84830355A priority Critical patent/EP0185833A1/de
Publication of EP0185833A1 publication Critical patent/EP0185833A1/de
Withdrawn legal-status Critical Current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
    • H04R7/00—Diaphragms for electromechanical transducers; Cones
    • H04R7/02—Diaphragms for electromechanical transducers; Cones characterised by the construction
    • H04R7/12—Non-planar diaphragms or cones
    • H04R7/122—Non-planar diaphragms or cones comprising a plurality of sections or layers
    • 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
    • H04R31/003—Apparatus or processes specially adapted for the manufacture of transducers or diaphragms therefor for diaphragms or their outer suspension

Definitions

  • the invention refers to a new conception proceedure for obtaining membra nes in plastic materials for the acoustic components of loudspeakers which substantially, in the moulding phase, determines the structural mo dification of the initial homogenous material of the plate while increas ing its elasticity and resistance.
  • the loudspeaker is a sound diffusing device with power and frequency high er than the normal ones, to be used for manifold employs. It essentially consists of a magnetic circuit, of a basket and of an acoustic component properly assembled. Underlaid to tension differences, the device generates magnetic fields which determine the motion of the mobile coil. As this one is fastened to the acoustic component, it strikes the air and originates the sound. For the best condition of employ, the acoustic diffuser must be in the position of strike the air theoretically in an infinite range of vibrations. This acoustic component, which is a deter minating part in the acoustic yield of the loudspeaker, at present is manufactured in a version with cellulous material.
  • This type of membrane has a modest elasticity and resistance since the cellulous material limitates the range and the power of these vibrations and with the time it causes the deterioration of the component particularly because of the condensate humidity and/or the light radiations.
  • at present and acoustic component is used which employs a membrane in plastic materials. This realization, in comparison with the previous ones, increases the membrane resistance to atmosphere agents, but it leaves the acoustic yield nearly unchanged.
  • the invention object performs an additional increase of resistance and a substantial improvement of the acoustic yield and power maintenance. This is possible because, in the membrane forming, the plastic material is properly operated by means of a structural transformation which enable an improvement of the above mentioned features.
  • the membrane thus carried out turns out to be more resistant and elastic with consequent increase of the answers in frequency. Accordingly a wider range of possibilities is allowed in the air striking and, therefore, a better total acoustic yield.
  • the conventional mould can be previously prepared for the membrane forming by fitting, on the walls of its active part, a support in relief screening leaf be means of sticking or otherwise.
  • the forming phase is foreseen with heat delivery through preheating of the mould performed by a resistance assembly inserted into it.
  • FIG. 1 is the perspective view of the loudspeaker.
  • Fig. 2 is its side view and fig. 3 its front one.
  • a magneti group 1 is used on which a basket 2 has been fixed by nails and mobile coil 3 mounted, and then a membrane 4 made according to the invention by means of sticking with centre square 5 and nucleus cover 6 fitted by sticking in a similar way. The whole is blocked by means of an annular gasket 7 which is sticked too in similar way.
  • the two polarities 8 and 9 of the mobile coil 3 are connected by tinning to the terminal board 10.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Manufacturing & Machinery (AREA)
  • Multimedia (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP84830355A 1984-12-27 1984-12-27 Membran aus Kunststoff für Lautsprecher Withdrawn EP0185833A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP84830355A EP0185833A1 (de) 1984-12-27 1984-12-27 Membran aus Kunststoff für Lautsprecher

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP84830355A EP0185833A1 (de) 1984-12-27 1984-12-27 Membran aus Kunststoff für Lautsprecher

Publications (1)

Publication Number Publication Date
EP0185833A1 true EP0185833A1 (de) 1986-07-02

Family

ID=8193113

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84830355A Withdrawn EP0185833A1 (de) 1984-12-27 1984-12-27 Membran aus Kunststoff für Lautsprecher

Country Status (1)

Country Link
EP (1) EP0185833A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022175306A1 (en) 2021-02-16 2022-08-25 Société des Produits Nestlé S.A. Composition and kit for alleviating symptoms of respiratory allergy
WO2022179905A1 (en) 2021-02-23 2022-09-01 Société des Produits Nestlé S.A. Composition and kit for alleviating symptoms of respiratory allergy in toddlers

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB640367A (en) * 1947-05-28 1950-07-19 Acoustic Products Ltd Improvements relating to diaphragms for loudspeakers
DE976940C (de) * 1954-06-26 1964-08-20 Kurt Mueller K G Dr Verfahren zur Herstellung einer Konusmembran fuer Lautsprecher
US3768590A (en) * 1971-09-23 1973-10-30 F Yocum Molded loudspeaker diaphragm
US3835265A (en) * 1971-11-08 1974-09-10 Pioneer Electronic Corp Vibrating member for acoustic transducer
US3862376A (en) * 1973-01-19 1975-01-21 Stanley F White Cone construction for loudspeaker

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB640367A (en) * 1947-05-28 1950-07-19 Acoustic Products Ltd Improvements relating to diaphragms for loudspeakers
DE976940C (de) * 1954-06-26 1964-08-20 Kurt Mueller K G Dr Verfahren zur Herstellung einer Konusmembran fuer Lautsprecher
US3768590A (en) * 1971-09-23 1973-10-30 F Yocum Molded loudspeaker diaphragm
US3835265A (en) * 1971-11-08 1974-09-10 Pioneer Electronic Corp Vibrating member for acoustic transducer
US3862376A (en) * 1973-01-19 1975-01-21 Stanley F White Cone construction for loudspeaker

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022175306A1 (en) 2021-02-16 2022-08-25 Société des Produits Nestlé S.A. Composition and kit for alleviating symptoms of respiratory allergy
WO2022179905A1 (en) 2021-02-23 2022-09-01 Société des Produits Nestlé S.A. Composition and kit for alleviating symptoms of respiratory allergy in toddlers

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Withdrawal date: 19870104

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Inventor name: NEROZZI, ALBERTO