U.S. Philips Corporation

Koninklijke Philips Corporation N.v.

Nxp B.v.

Knowles Electronics Asia Pte. Ltd.

Sound Solutions International Company, Ltd.

Knowles Ipc (m) Sdn. Bhd.

Ewald Frasl

Erich Klein

Ernst Ruberl

Susanne Windischberger

Peter Bleim

Josef Lutz

Christian Lembacher

Armin Timmerer

Mathias Weber

Gary Hsieh

Bernhard Seiwald

Peter Fischer

Stefan Amon

The present invention discloses a vibration membrane assembly for a speaker, a method for producing a vibration membrane assembly and a speaker. The assembly comprises a vibration membrane and a vibration membrane carrier ring. The method comprises providing a first thermal molding die having a molding side, the molding side having a profile which is complementary to that of the second side of the vibration membrane assembly, putting the vibration membrane carrier ring onto the molding side of the first thermal molding die and laying a vibration membrane blank onto the vibration membrane carrier ring to bring the vibration membrane blank in contact with the vibration membrane carrier ring, applying a pressure to the vibration membrane blank against the vibration membrane carrier ring to nest and fix the vibration membrane blank on the vibration membrane carrier ring to form the vibration membrane assembly, removing the pressure off the vibration membrane blank and separating the vibration membrane assembly from the first thermal molding die.

Vibration membrane assembly for speaker, speaker and method for producing the assembly

A loudspeaker comprises a voice coil and a diaphragm attached to the voice coil. The diaphragm has a generally rectangular outer shape, and comprises an outer rim (A) having an outer edge at which the diaphragm is fixed in position and an inner section (A) within the outer rim. The inner section (A) comprises: an outermost area (A) which is coupled to the voice coil and having the same generally rectangular outer shape; and an inner area (A) comprising a periodic rib structure (A), with the ribs running parallel to the shorter side of the rectangular outer shape, and two lateral transition areas (A) between the edges of the periodic rib structure (A) and the shorter side edges of outermost area (A).

Loudspeaker

In a method of and a device for producing a membrane () for an electroacoustic transducer, the procedure is such that a membrane (), which has been produced for example by deep-drawing, is at least partially coated on at least one surface with a liquid plastic (), in particular a plastic adhesive, and this liquid plastic is cured.

Method of and device for modifying the properties of a membrane for an electroacoustic transducer

A membranefor an acoustic deviceis provided, the membrane, wherein the membranecomprises a central portion, an annular portion, and a corrugation, wherein the annular portionis arranged around the central portion, wherein the annular portionis adapted to be fixed to a coil, and wherein the corrugationis arranged between the central portionand the annular portion. Thus, the corrugationmay form an inner corrugation compared to an outer corrugationwhich would be arranged farther away from the central portionthan the annular portion

Membrane for an acoustic device and acoustic device

A compound membrane () for an acoustic device (), the compound membrane () comprising a first layer () and a second layer (), wherein a value of Young's modulus of the second layer () does not vary more than essentially 30% in a temperature range between essentially &#x2212;20&#xb0; C. and essentially +85&#xb0; C.

Compound membrane, method of manufacturing the same, and acoustic device

In an electroacoustic transducer () with a stationary transducer part () and with a membrane configuration () comprising a membrane () and a handling ring () for the membrane () connected with the membrane (), the membrane configuration () is connected with the stationary transducer part () via the handling ring (), and the handling ring () and membrane () are connected together via an interlocking connection.

Method for manufacturing an electroacoustical transducer comprising a membrane configuration

A membrane () for an electroacoustic transducer () is disclosed, wherein a thickness (d) of said membrane () and an average Young's modulus (Eavg) of said membrane () are chosen in such a way that the critical load (Fbc), which causes the membrane () to buckle and/or crinkle, is increased compared to a reference membrane. The reference membrane made of Polycarbonate has the same shape, dimension, and stiffness in its direction of movement (MOV) as said membrane (). According to the result of investigations on buckling and/or crinkling, said effect occurs with different critical buckling/crinkling loads for membranes of the same shape and dimension, but made of different materials, even when the stiffness of the membranes in their direction of movement&#x2014;and hence their resonant frequency&#x2014;is identical.

Membrane with a high resistance against buckling and/or crinkling

A membrane () has a membrane axis () and a middle area (), a central cup-shaped depression () being provided around said membrane axis (), which depression () preferably has a connecting channel (), wherein the middle area () comprises groups of stiffening grooves () which extend parallel to radial directions and of which a first group of long stiffening grooves () extends up to the depression (), said connecting channel () issuing into two of the long stiffening grooves (), thus interconnecting these two long stiffening grooves ().

Electroacoustic transducer comprising a membrane with a middle area comprising stiffening grooves

An electroacoustic transducer ( ) having an oscillator coil ( ) which has two connecting leads ( ) is equipped with at least one retaining element ( ) for each connecting lead ( ), each retaining element ( ) being connected to a stationary component ( ) of the transducer ( ) and being held movable in relation to said stationary component ( ), while said stationary component ( ) borders a holding space ( ) through which a connecting lead ( ) being passed through.

Electroacoustic transducer having a moving coil and having movable holding elements for the connecting leads of the moving coil

In an electroacoustic transducer ( ) with a stationary transducer part ( ) and with a membrane configuration ( ) comprising a membrane ( ) and a handling ring ( ) for the membrane ( ) connected with the membrane ( ), the membrane configuration ( ) is connected with the stationary transducer part ( ) via the handling ring ( ), and the handling ring ( ) and membrane ( ) are connected together via an interlocking connection.

An electroacoustic transducer ( ) has a membrane ( ), which has a membrane axis ( ) and a ring-shaped pleats area ( ), the pleats area ( ) being provided with a multitude of pleats ( ), in which diametrically opposed pleats are embodied differently with regard to at least one of the pleat parameters.

Electroacoustic transducer comprising a membrane with an improved pleats area

In an electroacoustic transducer ( ) having a magnet system ( ) and having a diaphragm holder ( ) for holding a diaphragm ( ) and having a moving coil ( ) connected to the diaphragm ( ), the moving coil ( ) has a hollow cylindrical coil body ( ) and two connecting leads ( ), a holding element ( ) connected to the diaphragm holder ( ) being provided for each connecting lead ( ), which holding elements ( ) are constructed to be elastically deformable in a direction substantially parallel to the diaphragm axis ( ) and, preferably, also to be mechanically damping.

Electroacoustic transducer having a moving coil and elastic holding elements for the connecting leads of the moving coil

An electroacoustic transducer ( ) has a magnet system ( ) and a moving coil ( ), which is disposed in the air gap ( ) of the magnet system ( ), and a diaphragm ( ) attached to the moving coil ( ). The diaphragm ( ) has a mounting zone ( ) for mounting the moving coil ( ), and projections ( ) in the mounting zone ( ). The diaphragm ( ) also has an interspace between every two projections ( ), and two stabilizing walls ( ), which are inclined with respect to the diaphragm axis ( ), are arranged in each interspace and are arranged so as to form a roof shape and are formed so as to project beyond the mounting zone ( ) in radial directions.

Electroacoustic transducer having diaphragm with coil mounting projections and interposed stabilizing walls

In an apparatus ( ) having an electroacoustic transducer ( ) and having a printed circuit board ( ) the electroacoustic transducer ( ) has two terminal contact elements ( ) and the printed circuit board ( ) has two mating contact elements ( ), which terminal contact elements ( ) have two terminal contact portions ( ) which are oriented parallel to the transducer axis ( ) of the transducer ( ) and which mating contact elements ( ) have two mating contact portions ( ) which are oriented parallel to the transducer axis ( ), the terminal contact portions ( ) and the mating contact portions ( ) being held pairwise against each other in a direction transverse to the transducer axis ( ) and thus forming at least parts of a retainer ( ) with the aid of which the transducer ( ) is secured to the printed circuit board ( ).

Apparatus including an electroacoustic transducer having terminal contacts which extend in the direction of the transducer axis and including a printed circuit board having mating contacts

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Biedermannsdorf, Austria

Ewald Frasl