Striking or musical watch with an acoustic waveguide arrangement

Patent metadata

Field	Value
Publication number	US-11320788-B2
Application number	US-202016750762-A
Country	US
Kind code	B2
Filing date	Jan 23, 2020
Priority date	Feb 14, 2019
Publication date	May 3, 2022
Grant date	May 3, 2022

Abstract

A striking or musical watch with an acoustic waveguide arrangement. The striking or musical watch (1) includes an at least partially flexible waveguide (2) secured to a fixed part (8) inside the watch to guide the acoustic waves generated by a first portion (2′) of the at least partially flexible waveguide towards a radiating element. The radiating element can include a watch crystal (3) connected to a bezel (5) and a membrane (4) for connecting the bezel to a middle part (6) of a watch case. The flexible waveguide is configured to change the direction of acoustic vibration from the first portion to the radiating element.

First claim

The invention claimed is:

1. A musical or striking watch, comprising an at least partially flexible waveguide secured to a fixed part inside the watch to guide generated acoustic waves through a first portion of the at least partially flexible waveguide towards a radiating element, wherein the at least partially flexible waveguide is configured to change the direction of acoustic vibration from the first portion, or a first end of the flexible waveguide, to the radiating element placed at a second end of the at least partially flexible waveguide.

2. The watch according to claim 1 , wherein the at least partially flexible waveguide is in one piece.

3. The watch according to claim 1 , wherein said watch includes a resonant member capable of being made to vibrate by an excitation element at determined moments to generate acoustic waves supplied to the first portion of the at least partially flexible waveguide or in intermediate portions of the at least partially flexible waveguide.

4. The watch according to claim 1 , wherein the at least partially flexible waveguide can be excited in its first portion by an excitation element to generate acoustic waves guided inside the at least partially flexible waveguide.

5. The watch according to claim 1 , wherein the at least partially flexible waveguide can be excited in its first portion by an excitation element, and a resonant member is connected in intermediate portions of the at least partially flexible waveguide to generate acoustic waves guided inside the at least partially flexible waveguide.

6. The watch according to claim 1 , wherein the mass of the at least partially flexible waveguide is adapted to a resonance frequency of the acoustic waves to be guided inside the at least partially flexible waveguide.

7. The watch according to claim 1 , wherein the radiating element is a watch crystal, or a watch crystal connected to a bezel.

8. The watch according to claim 1 , wherein the radiating element is a back cover or a middle part of a watch case.

9. The watch according to claim 7 , wherein the radiating element further comprises a membrane for holding the crystal or the crystal with the bezel on a middle part of a watch case.

10. The watch according to claim 7 , wherein a second portion of the at least partially flexible waveguide is directly connected to the radiating element.

11. The watch according to claim 7 , wherein a second portion of the at least partially flexible waveguide comes into contact with the radiating element for the transmission of acoustic waves.

12. The watch according to claim 10 , wherein the second portion of the at least partially flexible waveguide is connected to the bezel of the radiating element.

13. The watch according to claim 10 , wherein the second portion of the at least partially flexible waveguide is connected to or in contact with the centre of the crystal of the radiating element by passing through the centre of a watch dial.

14. The watch according to claim 11 , wherein the second portion of the at least partially flexible waveguide is connected to or in contact with the centre of the crystal of the radiating element by passing through the centre of a watch dial.

15. The watch according to claim 10 , wherein the at least partially flexible waveguide is connected to the fixed part, which is a plate of the watch movement or a middle part of a watch case or an inner support, such as a casing ring, or a watch dial.

16. The watch according to claim 11 , wherein the at least partially flexible waveguide is connected to the fixed part, which is a plate of the watch movement or a middle part of a watch case or an inner support.

17. The watch according to claim 3 , wherein the resonant element is at least one gong of a striking mechanism in contact with the first portion of the at least partially flexible waveguide, and wherein the gong can be struck by the excitation element which is a hammer of the striking mechanism at predetermined moments to generate acoustic waves.

18. The watch according to claim 3 , wherein the resonant member is a vibration plate with strips of a striking mechanism in contact with the first portion of the at least partially flexible waveguide, and wherein the vibration plate can be actuated by the excitation element which is a disc or cylinder with pins for exciting the strips of the striking mechanism at predetermined moments to generate acoustic waves in the form of a melody.

19. The watch according to claim 1 , wherein the at least partially flexible waveguide is intended to be made from a material adapted for good fatigue resistance by a wire cutting technology, by electrodeposition or made from silicon.

20. The watch according to claim 1 , wherein the at least partially flexible waveguide is curved at an angle of more than 10 degrees between the first portion and the second portion of the at least partially flexible waveguide so as to switch from a mode of vibration in the plane of the watch to a piston-type out-of-plane vibration mode.

21. The watch according to claim 1 , wherein the at least partially flexible waveguide is curved at an angle of between 80 and 100 degrees between the first portion and the second portion of the at least partially flexible waveguide so as to switch from a mode of vibration in the plane of the watch to a piston-type out-of-plane vibration mode.

Assignees

• Montres Breguet Sa

Inventors

• Stranczl Marc

Classifications

• G04B37/0075 Primary

  with means to enhance sound transmission (sonorous means for chimes G04B21/08; for alarm clocks G04B23/028; clockworks combined with musical devices G04B47/025) · CPC title

• G04B37/087

  Protection of wrist or pocket watch cases against dust · CPC title

• G04B23/028

  Sounding bodies; boxes used as sounding cases; fixation on or in the case (sounding bodies G04B21/08; case enhancing transmission of sound waves G04B37/0075) · CPC title

• G04B37/088

  Means affording hermetic sealing inside the case, e.g. protective case for the clockwork against dust, the escapement being in a hermetically sealed case (case for watch pieces G04B37/0091; synchronous motor lubrication G04C15/009) · CPC title

• G04B23/12

  Alarm watches to be worn in pockets or on the wrist (giving signals by stimulating the skin G04B25/04) · CPC title