Suspended-hammer timepiece striking mechanism

Patent metadata

Field	Value
Publication number	US-11754976-B2
Application number	US-201916683554-A
Country	US
Kind code	B2
Filing date	Nov 14, 2019
Priority date	Dec 6, 2018
Publication date	Sep 12, 2023
Grant date	Sep 12, 2023

Abstract

Timepiece striking mechanism, including a fixed structure supporting at least one gong or radiant element and a mobile hammer in a plane under the action of an activation mobile component controlling the pallet of the hammer ( 3 ) and the release thereof for the percussion of the gong, and including, for the suspension of the hammer, at least one planar flexible guide between the structure and the hammer ( 3 ) to allow movements of the hammer solely on the plane, forming the sole mechanical link between the structure and the hammer, and, more particularly, for the execution of a striking mechanism, the striking mechanism (drives the activation mobile component, and has same carry out a winding cycle during which it supplies constant quantity of energy to the flexible guide while driving the hammer before releasing same for the execution of the striking mechanism by percussion of the gong during letting down.

First claim

The invention claimed is:

1. A timepiece striking mechanism ( 100 ), comprising a fixed structure ( 1 ) supporting at least one gong or radiant element ( 2 ) and a mobile hammer ( 3 ) relative to said fixed structure ( 1 ) under the action of an activation mobile component ( 4 ), comprised by said mechanism ( 100 ), and which is arranged to control the pallet of said hammer ( 3 ) and the release thereof for the percussion of at least one said gong or radiant element ( 2 ),
wherein said striking mechanism ( 100 ) comprises, for the suspension of the hammer ( 3 ), at least one flexible guide ( 10 ), which is arranged between the fixed structure ( 1 ) and the hammer ( 3 ) to allow movements of the hammer ( 3 ), and which forms the sole permanent mechanical link between said fixed structure ( 1 ) and said hammer ( 3 ).

2. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said striking mechanism ( 100 ) is arranged to drive said activation mobile component ( 4 ), for the execution of a striking mechanism, and to have the activation mobile carry out a winding cycle during which it supplies energy to said at least one flexible guide ( 10 ), which stores a constant quantity of energy, while driving said hammer ( 3 ) before releasing said hammer ( 3 ) for the execution of the striking mechanism by percussion of at least one said gong or radiant element ( 2 ) by said hammer ( 3 ) during the letting down with a constant quantity of energy corresponding to the energy stored in said flexible guide ( 10 ).

3. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said at least one flexible guide ( 10 ) is planar, and is arranged between said fixed structure ( 1 ) and said hammer ( 3 ) to allow movements of said hammer ( 3 ) solely in a single plane (P).

4. The timepiece striking mechanism ( 100 ) according to claim 3 , wherein said at least said flexible guide ( 10 ) comprises a plurality of elastic strips ( 11 ) which extend in said plane (P) or in a plurality of planes parallel with said plane (P), and which are, either parallel with one another, or crossed in projection on said plane (P) at the level of a virtual pivoting axis (D).

5. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said at least one said flexible guide ( 10 ) comprises at least one bistable or multistable elastic strip.

6. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said striking mechanism ( 100 ) comprises at least one said flexible guide ( 10 ) which is arranged to guide said hammer ( 3 ) in the winding and letting down travels thereof in a plane (P), and to accelerate said hammer ( 3 ) at the end of letting down travel.

7. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said at least one said flexible guide ( 10 ) comprises at least one first elastic strip arranged to guide said hammer ( 3 ) in the winding and letting down travels thereof in a plane (P), and at least one second elastic strip arranged to accelerate the hammer ( 3 ) at the end of letting down travel.

8. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said at least one of said flexible guides ( 10 ) comprises a reinforced strip ( 12 ) which is arranged to cooperate, particularly in the median part thereof, by abutting, during the letting down travel and before the percussion of said hammer ( 3 ) against a said gong or radiant element ( 2 ), with a fixed banking ( 13 ) rigidly connected to said fixed structure ( 1 ), so as to accelerate said hammer ( 3 ) immediately before the impact thereof on said gong or radiant element ( 2 ).

9. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) comprises a first winding tooth ( 14 ) arranged to cooperate with an activation tooth ( 15 ) comprised by said activation mobile component ( 4 ) during the winding phase for pivoting said hammer ( 3 ), and wherein said hammer ( 3 ) comprises, at a distance from said first winding tooth ( 14 ), a striker ( 17 ) arranged to strike said gong or radiant element ( 2 ), and wherein said striking mechanism ( 100 ) comprises a said flexible guide ( 10 ) in the vicinity of said first winding tooth ( 14 ) and in the vicinity of said striker ( 17 ).

10. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) comprises a first winding tooth ( 14 ) arranged to cooperate with an activation tooth ( 15 ) comprised by said activation mobile component ( 4 ) during the winding phase for pivoting said hammer ( 3 ), and wherein said flexible guide ( 10 ) comprises at least a first elastic strip in the vicinity of said first winding tooth ( 14 ), and wherein said hammer ( 3 ) comprises, at a distance from said first winding tooth ( 14 ), a striker ( 17 ) arranged to strike a said gong or radiant element ( 2 ), and wherein said flexible guide ( 10 ) comprises at least a second elastic strip in the vicinity of said striker ( 17 ).

11. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said striking mechanism ( 100 ) comprises a striking mechanism barrel and/or an energy storage and distribution means, and wherein said hammer ( 3 ) comprises a first winding tooth ( 14 ) arranged to cooperate with an activation tooth ( 15 ) comprised by said activation mobile component ( 4 ) during the winding phase for pivoting said hammer ( 3 ), and a second anti-unhooking tooth ( 16 ) arranged to be inserted, at the end of winding and at least the start of letting down, between two further said activation teeth ( 15 ), so as to prevent any uncontrolled unwinding of said striking mechanism barrel and/or energy storage and distribution means.

12. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) comprises at least one hammer magnet ( 23 ) or a ferromagnetic hammer element, arranged to cooperate with a ferromagnetic element of a mobile component or a magnet ( 24 ) of a mobile component, for the driving and release of said hammer ( 3 ) by said activation mobile component ( 4 ).

13. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) is moved by a substantially rotary movement or a combination of rotary movements.

14. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) is moved by a longitudinal movement.

15. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) is moved by a longitudinal movement, and wherein said hammer ( 3 ) comprises a mobile frame ( 33 ) guided longitudinally in bearing blocks ( 34 ), said frame ( 33 ) comprising internally a chamber ( 35 ) wherein rest beaks ( 36 ) are arranged to cooperate with activation teeth ( 15 ) comprised by said activation mobile component ( 4 ).

16. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said hammer ( 3 ) and the flexible guide(s) ( 10 ) supporting said hammer, as well as said gong or radiant element ( 2 ) with which said hammer ( 3 ) cooperates, are, in projection along said plane (P), symmetrical with respect to a plane perpendicular to said plane (P).

17. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said striking mechanism ( 100 ) comprises, for the suspension of said hammer ( 3 ), a plurality of planar flexible guides ( 10 ), separate and at a distance from one another.

18. The timepiece striking mechanism ( 100 ) according to claim 1 , wherein said striking mechanism ( 100 ) comprises a plurality of said hammers ( 3 ) and a plurality of

Assignees

• Montres Breguet Sa

Inventors

• Stranczl Marc

Classifications

• G04B5/188 Primary

  Bearing, guide arrangements or suspension of the movement forming oscillating weight · CPC title

• G04B21/06 Primary

  Details of striking mechanisms, e.g. hammer, fan governor {(escapements in general G04B15/00; mechanisms for stabilising frequency G04B17/00; resistance regulators G05D13/00; mechanical toys A63H)} · CPC title

• G04B5/165

  Weights consisting of several parts (diverse weights which are movable in more than one plane G04B5/187) · CPC title

• G04B15/10

  with constant impulses for the regulating mechanism {(electrically driven pendulums with mechanical pulse transmission and constant pulse G04C3/022; electrically driven pendulums with mechanical pulse transmission and constant pulse G04C3/045)} · CPC title

• G04B15/14

  Component parts or constructional details, e.g. construction of the lever or the escape wheel {(assembly and manufacture of the spring G04B1/145; assembly and manufacture of components, e.g. pinions, spindles G04B13/02; lubrication of clockwork bearings G04B31/008; oils for clockwork bearings in general G04B31/08)} · CPC title