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Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane

A technology for watches and music, used in devices that generate sound signals, clocks, mechanically driven clocks, etc., can solve problems such as inability to effectively radiate sound

Active Publication Date: 2020-05-05
BLANCPAIN SA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The natural oscillation frequency of the assembly formed by the mirror and the metal member is higher than the frequency band of the transmitted signal in order to avoid any degradation or distortion of the sound, which cannot effectively radiate the sound produced
Therefore, this constitutes a defect

Method used

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  • Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane
  • Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane
  • Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane

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Experimental program
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Effect test

Embodiment Construction

[0021] In the following description, all those components of a watch striking mechanism provided with an acoustic radiating membrane that are known in this technical field will only be briefly described. The focus is primarily on the arrangement of the membrane inside the case and its construction allowing sufficient sound radiation after the sound is generated inside the case.

[0022] therefore, figure 1 A first embodiment of a mechanical striking or musical watch 1 is represented, comprising at least one acoustically radiating membrane 2 . The acoustic radiating membrane 2 is made of a metallic material or an amorphous metal, and is a connection in the form of a ring with a wall having a certain thickness. It can be thought of as a diaphragm spring. This membrane 2 is arranged to be connected by a first edge portion 23 to the middle part 4 of the case, in particular to the upper part of the middle part 4 of the case, and by a second edge portion 20 to the bezel 3, the bez...

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PUM

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Abstract

The invention relates to a striking or musical watch (1) which is provided with an acoustic radiating membrane (2) made of metallic material or amorphous metal. The membrane (2) takes the form of a loop with walls of a certain thickness to be connected by a first edge portion (23) to a middle part (4) of a watch case and by a second edge portion (20) to a bezel (3) fixed to a watch crystal (5). 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. Themembrane 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. The frequency f0 is at a low frequency of less than or equal to 4 kHz according to the equation f0 = (1 / 2pi)* (k / m) 1 / 2, k is the stiffness of the film depending on the thickness of the film, and m is the mass of the bezel connected to the watch mirror.

Description

technical field [0001] The invention relates to a striking or musical watch provided with an acoustic radiating membrane. The watch comprises, inter alia, a case having a back cover and a case middle part and closed by a crystal to display time information on a dial below the crystal. Watches also contain a striking mechanism inside the case to produce sound or music at predetermined times or on demand. [0002] The invention also relates to a method of manufacturing an acoustically radiating membrane for a striking or musical watch. Background technique [0003] Watches with a striking mechanism for producing sound or music are known. For this reason, the gong of the chime watch or the vibrating plate of the music watch is arranged in the watch case. The vibrations of the gong or diaphragm strip are thus transmitted to various external parts. These external parts are in particular case middles, bezels, crystals and case backs. These large external parts start to radiat...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G04B21/08G04B37/00
CPCG04B21/08G04B37/0075G04B21/00G04B23/028G04B21/06G04B39/00
Inventor A·德利兹M·登登J·法夫尔
Owner BLANCPAIN SA