Flexible timepiece component and horological movement including such a component

Patent metadata

Field	Value
Publication number	US-12007716-B2
Application number	US-202017102793-A
Country	US
Kind code	B2
Filing date	Nov 24, 2020
Priority date	Dec 20, 2019
Publication date	Jun 11, 2024
Grant date	Jun 11, 2024

Abstract

A flexible timepiece component, in particular for an oscillator mechanism or for a barrel of a horological movement, the component extending along a main plane (P) and including at least a part made of a composite material (1), the composite material (1) including a matrix (2) and a multitude of nanowires (3) distributed in the matrix (2), the nanowires (3) being juxtaposed, the matrix (2) including a material (4) for filling the interstices between the nanowires (3) to join them to each other, each nanowire (3) forming a solid one-piece tube, the nanowires (3) being disposed substantially parallel to an axis (A) substantially perpendicular to the main plane (P) of the component (6, 7).

First claim

The invention claimed is:

1. A flexible timepiece component for an oscillator mechanism or for a barrel of a horological movement, the component extending along a main plane and including at least a part made of a composite material, wherein the composite material comprises a matrix and a multitude of nanowires distributed in the matrix, the nanowires being juxtaposed, the matrix including a material for filling the interstices between the nanowires to join them to each other, each nanowire forming a solid one-piece tube, the nanowires being disposed substantially parallel to an axis substantially perpendicular to the main plane of the component.

2. The component according to claim 1 , wherein the nanowires are made of an element to be selected from the following list: gold, palladium, silicon, diamond, boron nitride, gallium nitride, silicon nitride, zinc oxide, gallium arsenide, tungsten sulphide, silver, copper, manganese arsenide, indium arsenide, nickel, platinum, germanium, cobalt-graphene, phosphorus-germanium, copper-silver, gold-silver alloys, phosphorus-indium, nitrogen-gallium, nitrogen-indium-gallium, nitrogen-arsenic-gallium, arsenic-gallium, phosphorus-indium-gallium, sulphur-cadmium, sulphur-cadmium-selenium, nitrogen-aluminium-gallium, caesium-lead, antimony telluride, bismuth telluride, silicon oxide, titanium oxide, aluminium oxide, magnesium oxide, tungsten oxide, indium oxide, tin oxide, zinc oxide, lithium niobate, manganese oxide compounds, inorganic compounds of the Li 2 Mo 6 Se 6 or Mo 6 S 9-x I x type, amorphous or partially amorphous metal alloys.

3. The component according to claim 1 , wherein the nanowires have a diameter comprised within a range from 2 to 50 nm.

4. The component according to claim 1 , wherein the nanowires have a length comprised within a range from 100 to 500 microns.

5. The component according to claim 1 , wherein the filling material is produced from an element to be selected from the following list: tungsten, organic materials such as parylene, hexagonal boron nitride, poly-crystalline ruby of the Al 2 O 3 type, poly-crystalline diamond, poly-crystalline silicon, tungsten or molybdenum disulphides, graphite, lead, silicon carbide, nickel, indium phosphide, titanium oxide, poly-silicone, amorphous carbon, amorphous carbon of the DLC (Diamond-like-carbon) type, hafnium oxide, silicon oxide, strontium titanate, zinc oxide, indium oxide, tungsten oxide, niobium oxide, cadmium oxide, magnesium fluoride, titanium nitride, silicon nitride, aluminium nitride, gallium nitride, hafnium nitride, calcium nitride, silver nitride, oxidised silicon nitride, platinum, palladium, molybdenum, tantalum, zinc sulphide, molybdenum sulphide, germanium, hydrofluorocarbon, compounds of the AlP, AlN, AlGaSb, AlGaAs, AlGaInP, AlGaN, AlGaP, GaSb, GaAsP, GaAs, GaN, GaP, InAlAs, InAlP, InSb, InGaSb, InGaN, GaInAlAs, GaInAlN, GaInAsN, GaInAsP, GaInAs, GaInP, InN, InP, InAs, InAsSb, ZnSe, HgCdTe, GeSbTe type.

6. The component according to claim 1 , wherein the component is a spiral balance spring.

7. The component according to claim 1 , wherein the component is a barrel spring.

8. A horological movement, comprising the flexible timepiece component according to claim 1 .

9. The component according to claim 1 , wherein the nanowires have a diameter comprised within a range from 3 to 15 nm.

10. The component according to claim 1 , wherein the nanowires have a diameter comprised within a range from 5 to 10 nm.

11. The component according to claim 1 , wherein the nanowires have a length comprised within a range from 100 to 300 microns.

12. The component according to claim 1 , wherein the nanowires have a length comprised within a range from 150 to 200 microns.

Assignees

• Swatch Group Res & Dev Ltd

Inventors

• Cusin Pierre
• Charbon Christian
• Haemmerli Alexandre
• Paratte Lionel
• Imboden Matthias

Classifications

• G04B17/06

  Oscillators with hairsprings, e.g. balance {(electrically driven balances G04C3/04; contacts actuated by a balance G04C13/065)} · CPC title

• F16F2228/007

  of solids, e.g. hardness · CPC title

• F16F2224/0208

  Alloys · CPC title

• F16F1/10

  Spiral springs with turns lying substantially in plane surfaces {(F16F1/326 takes precedence)} · CPC title

• F16F1/021

  characterised by their composition, e.g. comprising materials providing for particular spring properties (composition and manufacture of clock or watch springs G04B1/145) · CPC title