Electrical audio signal processing systems and devices – Electro-acoustic audio transducer – Having electrostatic element
Patent
1994-12-19
1996-11-12
Kuntz, Curtis
Electrical audio signal processing systems and devices
Electro-acoustic audio transducer
Having electrostatic element
381202, 381204, H04R 2500
Patent
active
055747973
ABSTRACT:
In the state of the art, it is known to connect diaphragms (11) of cone loudspeakers to the loudspeaker frame (10) by means of so-called beads (13). Such beads (13) are predominantly made of plastic or rubber, and are connected to the diaphragm (11) or the loudspeaker frame (10) by means of suitable adhesives. This type of connection limits the free selection of the above named components, because not all elastic bead materials can be connected to the diaphragm (11) with the required mechanical stability. The selection of materials is further restricted when the loudspeaker is subjected to ambient temperatures above 100.degree. C., because the adhesive connections lose their strength under such conditions. The invention has therefore the task of presenting a high-strength suspension mount for the diaphragms of cone loudspeakers. This task is fulfilled in that the bead (13) is made of an injection-moldable and high-temperature resistant elastomer material (e.g. silicon rubber or fluoroelastomer) and the inner edge (18) of the bead (13) is connected to the upper edge (19) of the diaphragm (11) by vulcanization. Special high-strength connections of diaphragm (11) and bead (13) are provided when the upper edge (19) of the diaphragm (11) has perforations (20), and the areas of the inner edge (18) on both sides of the diaphragm (11) are connected by beading material through the perforations (20) of the diaphragm (11).
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Chang Vivian W.
Kuntz Curtis
Nokia Technology GmbH
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