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STRIKING OR MUSICAL WATCH PROVIDED WITH AT LEAST ONE ACOUSTIC RADIATING MEMBRANE AND METHOD FOR MANUFACTURING THE MEMBRANE

  • US 20200133202A1
  • Filed: 10/10/2019
  • Published: 04/30/2020
  • Est. Priority Date: 10/26/2018
  • Status: Active Grant
First Claim
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1. A striking or musical watch provided with at least one acoustic radiating membrane made of metallic material or amorphous metal, said membrane taking the form of a loop with walls of a specific thickness to be connected by a first edge portion to a middle part of a watch case and by a second edge portion to a bezel secured to a watch crystal, or directly to a watch crystal, the bezel connected to the crystal or the crystal being movable with respect to the case middle via the membrane during vibration of the membrane once a sound is generated by the watch striking mechanism in the watch case,wherein the membrane is configured with a wall of a specific thickness in an active region dependent on the mass of the bezel connected to the crystal, or only of the crystal, to obtain a frequency f0 of a first vibration mode, which is on a low frequency of less than or equal to 4 kHz according to the equation f0=(½

  • π



    (k/m)1/2 where k is the stiffness of the membrane, which depends on the thickness thereof, and m is the mass of the bezel connected to the crystal, or only of the crystal.

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