24-10-2013 дата публикации
Номер: US20130279303A1
Method of ultrasonic welding a watch crystal (), wherein the watch comprises a middle part () which, with the crystal (), delimits a watch case (), the crystal comprising a top face oriented towards the user and an opposite bottom face oriented towards the watch case, a digital display device () being fixed to the bottom face () of the crystal (), a printed circuit board () being disposed inside the watch case (), underneath and remote from the digital display device (), the digital display device () being electrically connected to the printed circuit board () by means of a zebra-type electrical connector (), the method being characterized in that as the crystal () is abutting on a shoulder () arranged in the middle part (), the ultrasounds are directed onto the shoulder () to melt said shoulder () and to lower the level of the crystal () in the direction of the printed circuit board (), so that the zebra connector () is compressed between the digital display device () and the printed circuit board (). 13-. (canceled)4. A watch comprising a middle part which , with the crystal , delimits a watch case , the crystal comprising a top face oriented towards the user and an opposite bottom face oriented towards the watch case , a digital display device being fixed to the bottom face of the crystal , a printed circuit board (being disposed inside the watch case , underneath and remote from the digital display device , the digital display device being electrically connected to the printed circuit board by means of a zebra-type electrical connector , the crystal abutting on a shoulder arranged in the middle part , the watch being characterised in that the shoulder protrudes from the middle part so that , before ultrasonic welding of the crystal on the middle part , the crystal is not in contact in its final position with the crystal , the height of the shoulder with respect to the printed circuit board being so that , after consumption of the shoulder during the ultrasonic ...
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