Pin for mutually assembling two parts

Patent metadata

Field	Value
Publication number	US-2025277503-A1
Application number	US-202519045062-A
Country	US
Kind code	A1
Filing date	Feb 4, 2025
Priority date	Feb 29, 2024
Publication date	Sep 4, 2025
Grant date	—

Abstract

A pin ( 10 ) extending along a longitudinal axis between a first end ( 100 ) intended to be rigidly connected to a first part ( 30 ) and a second end ( 200 ) intended to be engaged in a recess ( 21 ) in a second part ( 20 ), with a fit without mechanical play, the second end ( 200 ) having a cut-out ( 210 ) delimiting an unmoving part ( 220 ) and a flexible part ( 230 ) and passing through, from end to end, the second end ( 200 ) transversely to the longitudinal axis, the cut-out ( 210 ) being configured so as to have, in a plane P containing the longitudinal axis, a projection whose general shape is asymmetrical.

First claim

1 . A pin ( 10 ) extending along a longitudinal axis between a first end ( 100 ) intended to be rigidly connected to a first part ( 30 ) and a second end ( 200 ) intended to be engaged in a recess ( 21 ) in a second part ( 20 ), with a fit without mechanical play,
wherein the second end ( 200 ) has a cut-out ( 210 ) delimiting an unmoving part ( 220 ) and a flexible part ( 230 ) and passing through, from end to end, the second end ( 200 ) transversely to the longitudinal axis, the cut-out ( 210 ) being configured so as to have, in a plane P containing the longitudinal axis, a projection whose general shape is asymmetrical, the cut-out ( 210 ) having a first portion ( 213 ) extending from an opening ( 211 ) towards a free end of the second end ( 200 ) and a second portion ( 215 ) connected to the first portion ( 213 ) and extending towards the first end ( 100 ) as far as a bottom ( 212 ) of the cut-out ( 210 ).

2 . The pin ( 10 ) according to claim 1 , wherein the second portion ( 215 ) is connected to the first portion ( 213 ) by a curved portion ( 214 ).

3 . The pin ( 10 ) according to claim 1 , wherein the cut-out ( 210 ) is configured so that the first and the second portion ( 213 , 215 ) define an angle α, the bisector of which is materialised by the longitudinal axis of the pin ( 10 ).

4 . The pin ( 10 ) according to claim 1 , wherein the free end of the second end ( 200 ) forms a point ( 231 ) extending along the longitudinal axis of the pin ( 10 ), said point ( 231 ) being interposed between a hooking portion ( 232 ) via which it is connected to the unmoving part ( 220 ), and a free portion ( 233 ) capable of moving between a rest position and a stressed position.

5 . The pin ( 10 ) according to claim 1 , wherein the second end ( 200 ) has at least one flat section ( 24 ) extending over the unmoving part ( 220 ) and over the flexible part ( 230 ).

6 . An assembly of a first and of a second part ( 20 ) by way of the pin ( 10 ) according to claim 1 , wherein the first end ( 100 ) of the pin ( 10 ) is fastened to the first part ( 30 ) and the second end ( 200 ) of the pin ( 10 ) is engaged in a recess ( 21 ) in the second part ( 20 ), with a fit without mechanical play, such that the flexible part ( 230 ) is forced to deform and generate a resilient return force which causes the clamping forces applied by the second end ( 200 ) to the second part ( 20 ).

7 . The assembly of a first and of a second part ( 20 ) by way of a pin ( 10 ) according to claim 1 , wherein the first end ( 100 ) of the pin ( 10 ) and the first part ( 30 ) are constituted by the same part, the second end ( 200 ) of the pin ( 10 ) being engaged in a recess ( 21 ) in the second part ( 20 ), with a fit without mechanical play, such that the flexible part ( 230 ) is forced to deform and generate a resilient return force which causes the clamping forces applied by the second end ( 200 ) to the second part ( 20 ).

8 . The assembly according to claim 6 , wherein the second end ( 200 ) has a diametrical dimension d 1 defined between a peripheral surface of the unmoving part ( 220 ) and a peripheral surface of the flexible part ( 230 ) when the free portion ( 233 ) is in a rest position, said peripheral surfaces defining a dimension d 2 when the free portion ( 233 ) is in a stressed position, the pin ( 10 ) being dimensioned such that the dimension d 1 is greater than a dimension d 3 of a diameter of the recess ( 21 ) in the second part ( 20 ), and such that the dimension d 2 is equal to said dimension d 3 .

Assignees

• Eta Sa Mft Horlogere Suisse

Inventors

• Donze Christophe
• Pham Patric

Classifications

• F16B19/02 Primary

  Bolts or sleeves for positioning of machine parts, e.g. notched taper pins, fitting pins, sleeves, eccentric positioning rings · CPC title

• F16B19/002 Primary

  Resiliently deformable pins (F16B21/06 takes precedence) · CPC title

• F16B21/00

  Means for preventing relative axial movement of a pin, spigot, shaft or the like and a member surrounding it (riveted or deformable spigots F16B19/04; for gudgeon pins F16J1/18); Stud-and-socket releasable fastenings · CPC title

• F16B21/088

  the stud, pin or spigot being integrally formed with the component to be fastened, e.g. forming part of the sheet, plate or strip · CPC title

• F16B19/004

  made in one piece (F16B21/084 takes precedence) · CPC title