STRIKING OR MUSICAL WATCH PROVIDED WITH AT LEAST ONE ACOUSTIC RADIATING MEMBRANE AND METHOD FOR MANUFACTURING THE MEMBRANE
First Claim
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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Accused Products
Abstract
A striking watch is provided with an acoustic radiating membrane made of metallic material or amorphous metal. The membrane takes the form of a loop with walls of a certain 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 fixed to a watch crystal. The bezel connected to crystal is movable with respect to the case middle via the membrane during the vibration of membrane once a sound is generated by a watch striking mechanism in the watch case. 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, to obtain a frequency f0 of a first vibration mode.
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Citations
17 Claims
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17)
- π
Specification