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:
Dec. 16, 1997
Filed:
May. 23, 1995
Stefan Geisenberger, Straubing, DE;
Manfred Aigner, Schwarzach, DE;
Nokia Technology GmbH, Pforzheim, DE;
Abstract
According to the state of the art, insofar as the respective components of the loudspeaker cannot be built in one piece, the respective components of the loudspeaker are joined to each other by adhesives. For example, it is known to bond the aluminum voice coil support (10) to the paper loudspeaker diaphragm (11). However, if loudspeakers with such bonded joints must operate above 120 degrees Celsius, no long-term continuous operation of the mechanically highly stressed adhesion can be expected. The invention therefore has the task of presenting a very strong mechanical joint of the loudspeaker components. The task is fulfilled according to the invention, in that at least the surface areas (13.1, 13.2) of the loudspeaker components to be joined to each other �perhaps the voice coil support (10) and the loudspeaker diaphragm (11)! are made of metals that can be ultrasonically welded to each other, and that the joint between the two components of the loudspeaker is ultrasonically weldable. Insofar as required, an insulation arrangement (16) can be placed between the two just mentioned loudspeaker components, which can be ultrasonically welded to the respective components of the loudspeaker �in this instance loudspeaker diaphragm (11) and voice coil support (10)!, through their metal coatings (19.1, 19.2), which are also made of ultrasonically weldable metal.