The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 1996
Filed:
Dec. 19, 1994
Stefan Geisenberger, Straubing, DE;
Nokia Technology GmbH, Pforzheim, DE;
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).