Sub-assembly of external parts for timepiece or watch or a piece of jewellery

Patent metadata

Field	Value
Publication number	US-11630422-B2
Application number	US-202016919435-A
Country	US
Kind code	B2
Filing date	Jul 2, 2020
Priority date	Sep 20, 2019
Publication date	Apr 18, 2023
Grant date	Apr 18, 2023

Abstract

A sub-assembly of external parts including, coaxially with a first component and a second component compressing together a sealing and friction joint, and interposed therebetween, a bolt securing them together by axially blocking the first component, and a lower surface of which lies, in the assembled position, in the vicinity of an upper surface of the second component, which bolt includes a lower relief protruding axially from this lower surface towards the second component, arranged to either complementarily cooperate with an oblong groove which is partially of revolution that the upper surface includes, and interrupted by a stopper limiting the angular travel between the second component and the bolt within a turn, or else to constitute an angular stopper to an upper relief protruding from the upper surface of the second component and extending axially towards the bolt.

First claim

The invention claimed is:

1. A sub-assembly of external parts for a watch or for a piece of jewellery, comprising, coaxially with a first component and a second component compressing together a sealing and friction joint, and interposed therebetween, a bolt securing them together by axially blocking said first component, and a lower surface of said bolt faces, in the assembled position, an upper surface of said second component, wherein said bolt includes a lower relief protruding axially from said lower surface towards said second component, wherein said lower relief is arranged to either complementarily cooperate with an oblong groove which is partially of revolution that said upper surface includes, and interrupted by a stopper limiting the angular travel between said second component and said bolt within a turn, or to constitute an angular stopper to an upper relief protruding from said on upper face of said second component and extending axially towards said bolt.

2. The sub-assembly of external parts according to claim 1 , wherein said sub-assembly comprises, substantially of revolution about the same axis, said first component and said second component, said first component including a first surface arranged to complementarily cooperate with a second surface that said second component includes so as to compress therewith at least one said sealing and friction joint interposed between said first surface and said second surface, wherein said bolt is also substantially of revolution about said axis, and is arranged to secure said first component with said second component by screwing and/or elastic retention in an axial blocking position in the direction of said axis, said bolt including, on the one hand, first fastening means arranged to cooperate with first complementary fastening means that said first component includes, and on the other hand, second fastening or support means arranged to cooperate with second complementary fastening or support means that said second component includes.

3. The sub-assembly of external parts according to claim 1 , wherein said bolt comprises locating means arranged to cooperate with complementary locating means that said second component includes to determine their relative angular indexing position.

4. The sub-assembly of external parts according to claim 1 , wherein said bolt comprises a ring including said at least one lower relief.

5. The sub-assembly of external parts according to claim 1 , wherein said bolt comprises a split ring arranged to receive, on only part of its periphery, at least one removable insert which includes a said lower relief.

6. The sub-assembly of external parts according to claim 5 , wherein said at least one removable insert is insertable and extractable in the direction of said axis, wherein said ring comprises, on either side of a slot that it includes, a housing, or respectively a post, arranged to complementarily cooperate with a post, or respectively a housing, that a said removable insert includes for its radial retention relative to said axis.

7. The sub-assembly of external parts according to claim 4 , wherein said ring is an elastic split ring.

8. The sub-assembly of external parts according to claim 2 , wherein said first fastening means are constituted by a threading arranged to cooperate with a tapping constituting said first complementary fastening means.

9. The sub-assembly of external parts according to claim 8 , wherein said ring comprises said threading, and wherein said removable insert has no threading.

10. The sub-assembly of external parts according to claim 2 , wherein said second fastening or support means are constituted by an upper surface that a lower collar comprises that said bolt includes, and wherein said second complementary fastening or support means are constituted by a lower surface that an upper collar includes that said second component includes.

11. The sub-assembly of external parts according to claim 10 , wherein said lower collar and/or said upper collar is elastic.

12. The sub-assembly of external parts according to claim 1 , wherein at least one said sealing and friction joint is housed in a joint groove that said second component or said first component includes.

13. The sub-assembly of external parts according to claim 1 , wherein said first component is a middle part and said second component is a back.

14. The sub-assembly of external parts according to claim 1 , wherein said first component is a middle part and said second component is a flange or a bezel.

15. The sub-assembly of external parts according to claim 1 , wherein said first component is a middle part or a tube attached to a middle part, and said second component is a crown or a crown rod or a push-piece.

16. The subassembly of external parts according to claim 1 , wherein said bolt comprises at least one elastic element arranged to constitute means of radial repulsion tending to press said first component and said second component on each other.

17. A watch comprising the sub-assembly of external parts according to claim 1 .

18. A piece of jewellery comprising the sub-assembly of external parts according to claim 1 .

19. A method for assembling the sub-assembly of external parts according to claim 5 , wherein said elastic split ring is inserted into said second component, wherein each said removable insert that said bolt includes is inserted into said ring, wherein said at least one sealing and friction joint is positioned between said second component and said first component, and that said bolt and said first component are screwed together, first of all by driving said second component relative to said bolt until said lower relief reaches a first stop position at a first end of said angular travel, then by performing the complete screwing at the recommended torque between said bolt and said first component, wherein said second component is angularly oriented relative to said first component by driving it in the direction opposite to the direction of screwing to the desired position.

20. The assembly method according to claim 19 , wherein, in order to proceed with the dismounting of said sub-assembly of external parts, the second component is continued to be driven in the direction opposite to the screwing direction until a said lower relief reaches a second stop position at the other end of said angular travel, allowing said bolt to be driven in order to unscrew it from said first component.

21. The subassembly of external parts according to claim 1 , wherein said lower relief is arranged to complementarily cooperate with an oblong groove which is partially of revolution that said upper surface includes, and interrupted by a stopper limiting the angular travel between said second component and said bolt within a turn.

22. The subassembly of external parts according to claim 1 , wherein said lower relief is arranged to constitute an angular stopper to an upper relief protruding from said on upper face of said second component and extending axially towards said bolt.

Assignees

• Swatch Group Res & Dev Ltd

Inventors

• Tschumi Philipp

Classifications

• G04B37/08

  Hermetic sealing of openings, joints, passages or slits {(covers or protecting devices which can be directly removed, or by sliding or turning G04B37/005; hermetic sealing of watch or crystal with special pieces G04B39/02; hermetically-sealed electrical switches H01H23/06)} · CPC title

• G04B19/283

  on rotatable rings, i.e. bezel (for graduations on the bezels G04B19/18) · CPC title

• G04B37/005

  with cover or protection device which can be completely removed, either by lifting off or by sliding, or by turning (protection covers, protection cases also against humidity) · CPC title

• G04B37/0008 Primary

  for pocket watches and wrist watches · CPC title

• G04B37/0041 Primary

  the cover or the bottom can slide or turn with a spring action · CPC title