EP3955064A1 - Uhrkomponente, die eine öffnung zum einpressen einer welle umfasst - Google Patents

Uhrkomponente, die eine öffnung zum einpressen einer welle umfasst Download PDF

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Publication number
EP3955064A1
EP3955064A1 EP20190761.5A EP20190761A EP3955064A1 EP 3955064 A1 EP3955064 A1 EP 3955064A1 EP 20190761 A EP20190761 A EP 20190761A EP 3955064 A1 EP3955064 A1 EP 3955064A1
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EP
European Patent Office
Prior art keywords
notches
elastic part
timepiece component
component according
elastic
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP20190761.5A
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English (en)
French (fr)
Inventor
Jean-Baptiste LE BRIS
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Patek Philippe SA Geneve
Original Assignee
Patek Philippe SA Geneve
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP20190761.5A priority Critical patent/EP3955064A1/de
Publication of EP3955064A1 publication Critical patent/EP3955064A1/de
Pending legal-status Critical Current

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    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/021—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft
    • G04B13/022—Wheels; Pinions; Spindles; Pivots elastic fitting with a spindle, axis or shaft with parts made of hard material, e.g. silicon, diamond, sapphire, quartz and the like

Definitions

  • the present invention relates to a timepiece component comprising an element in the form of a perforated plate which is produced in a single piece of a fragile material and which comprises an opening intended for driving in an axis.
  • An object of the present invention is to remedy the drawbacks of the prior art which have just been explained.
  • the present invention achieves this and other objects by providing a horological component which is in accordance with appended claim 1.
  • the element comprising the opening intended for driving out a shaft comprises at least a first part and at least a second part, the first part, called the connecting part, being arranged so as to connect the element in the form of a perforated plate to the rest of the timepiece component, and the second part, called the elastic part, having a plurality of internal notches cutting into its internal side, and a plurality of external notches cut into its external side.
  • the internal notches and the external notches are oriented radially with respect to the opening intended for driving in the shaft, and are arranged alternately so that a section of the elastic part which is delimited on both sides another by two outer notches always contains an inner notch, and vice versa.
  • the presence of the inner notches and the outer notches has the effect of reducing in places the distance between the inner and outer edges of the elastic part.
  • the latter thus comprises a succession of constricted places which are easier to deform elastically.
  • their deformations affect the degree of opening of the notch in question.
  • the two edges of each notch will deviate or approach depending on the deformations of the narrow places.
  • the simultaneous separation of the edges of the internal notches results in an elongation of the internal side of the elastic part
  • the simultaneous separation of the edges of the external notches results in an elongation of its external side.
  • a simultaneous separation of the edges of the inner notches and the edges of the outer notches results in a general elongation of the elastic part.
  • the connecting part has an inner side whose shape is complementary to that of the axis and an outer side whose central portion is not significantly deformed during driving-in.
  • the driving out of a pin is associated with an elongation of the elastic part. It will be understood that this results in a non-negligible distortion of the external shape of the element in the form of a perforated plate. Under these conditions, it is advantageous for the connecting part to be only slightly deformed. Indeed, this characteristic makes it possible to absorb the geometric variations due to the tolerances without causing significant variations in the position of the center of pivoting relative to the rest of the component.
  • the figure 1 is a plan view of a timepiece component that conforms to a first exemplary embodiment.
  • the component shown in figure 1 is intended to exert a restoring torque on a pivoted axis.
  • the component comprises an elastic arm 9, a base 24 and an element 25 in the form of a perforated plate.
  • One of the ends of the elastic arm 9 is connected to the frame of a timepiece via the base 24, and the other end is connected to a cylindrical axis 10 via the element 25 in the form of perforated plate.
  • the axis 10 is a pivoted axis which is driven into an opening 11 of the element 25.
  • the respective diameters of the axis 10 and of the opening 11 are chosen so that the element 25 exerts on the axis 10 a clamping force of sufficient intensity to make these two elements integral.
  • the element 25, the elastic arm 9 and the base 24 are made of a fragile material; for example silicon, quartz or glass.
  • these three elements come from the material, or in other words, these three elements together form a one-piece component made by micro-machining from a single block of fragile material.
  • the function of the watch component of the figure 1 is to exert on the axis 10 a return torque (which is oriented clockwise in the figure). This component is likely to be integrated for example in a cam mechanism like the one described in the patent document EP 3 598 242 A1 . This document is incorporated by reference in the present description.
  • the element 25 has been divided into a first and a second part (referenced 13 and 15 respectively) by means of two dashed lines.
  • the part 13 to which the elastic arm 9 is attached is the first part, or connecting part.
  • the latter has an axis of symmetry oriented radially so as to pass through the center of the opening 11 and through the point of attachment of the end of the elastic arm 9, and it has an inner side in the form of an arc of circle whose radius of curvature corresponds substantially to that of the axis 10, and an outer side which comprises a straight central segment extending between two shoulders.
  • the second part, or elastic part 15 generally has the shape of a crown sector with an inner side in an arc of a circle whose radius of curvature corresponds substantially to that of the axis 10, and an outer side which is concentric on the inner side.
  • Six inner notches 17 are cut in the inner side and five outer notches 19 are cut in the outer side.
  • the inner 17 and outer 19 notches are regularly spaced and arranged alternately so that inside the elastic part 15, a section delimited by two inner notches 17 always contains an outer notch 19, and vice versa.
  • the internal notches 17 have the shape of notches oriented radially with respect to the axis 10, and they each end in a circular widening. Their length is between three-quarters and four-fifths of the distance separating the inner side from the outer side.
  • the figure 1 further observes that, due to the presence of the internal notches, the developed length of the internal edge of the extensible sector is equal to at least four times the length of the internal arcuate side of the elastic part.
  • the outer notches 19, for their part, have substantially the shape of half-moons, the radius of which is equal to approximately one third of the distance separating the outer side from the inner side. It can be seen that the proximity between the inner notches 17 and the outer notches 19 has the effect of reducing in places the distance separating the inner edge of the elastic part 15 from its outer edge.
  • the elastic part thus comprises a succession of narrow isthmuses which each separate the circular end of an inner notch 17 from the arcuate edge of an outer notch 19. It will be understood that because of their narrowness, these are these isthmuses which support the major part of the deformation when the elastic part 15 is subjected to stresses.
  • the picture 2 is a plan view of a timepiece component that conforms to a second exemplary embodiment.
  • the component shown in figure 2 comprises an elastic arm 109, a base 124 and an element 125 in the form of a perforated plate.
  • This component is intended to exert a restoring torque on a pivoted pin 110 which is driven into an opening 111 of the element 125.
  • the element 125, the elastic arm 109 and the base 124 are made in one brittle material; for example silicon, quartz or glass.
  • these three elements come from the material.
  • the restoring torque exerted by the timepiece component is oriented clockwise.
  • This component is intended to be integrated for example in a cam mechanism like the one described in the patent document EP 3 598 242 A1 .
  • the outline of the element 125 is part of a crown delimited by an inner circle 127 and by an outer circle 129 concentric. It can be seen that the circle 127 delimits the opening 111, its radius therefore being substantially equal to that of the axis 110.
  • the crown between the inner circle 127 and the outer circle 129 has been divided into a first and a second part (referenced 113 and 115 respectively).
  • the part 113 to which the elastic arm 109 is attached is the first part, or connecting part.
  • the latter has an inner side in an arc of a circle which is superimposed on the inner circle 127, and an outer side which is straight.
  • the first part thus presents the general shape of an isosceles trapezium whose small base would not be rectilinear, but rounded concave. It can be seen that the elastic arm 109 is attached to the middle of the rectilinear outer side of the part 113.
  • the second part 115 or elastic part, has an inner side and an outer side formed by two arcs of concentric circles which are respectively superimposed on the inner circle 127 and outer circle 129. Eleven inner notches 117 are cut into the inner side and ten outer notches 119 are cut into the outer side.
  • the interior 117 and exterior 119 notches are regularly spaced and arranged in alternation so that, inside the elastic part 115, a section delimited by two internal notches 117 always contains an external notch 119, and vice versa.
  • the internal notches 117 and the external notches 119 have the form of notches oriented radially with respect to the axis 110.
  • the internal notches and the external notches have the same length. The latter is between 70 and 80% of the distance separating the outer side of the elastic part from its inner side.
  • the developed length of the interior edge of the elastic part is equal to at least four times, preferably at least ten times, the length of the interior side of the elastic part.
  • the interpenetration of the inner notches 117 and the outer notches 119 has the effect of giving the elastic part 115 the shape of a serpentine ribbon which runs in zigzag over a range in the form of a crown sector between the inner circle 127 and the outer circle 129.
  • the elastic part 115 thus comprises a series of straight sections which each separate an inner notch 117 from an outer notch 119, a first series of "U"-shaped sections each separating the end of a notch exterior 119 on the interior side of the elastic part, and finally a second series of "U” sections each separating the end of an interior notch 117 on the exterior side.
  • each straight section is attached by a first end to a "U" shaped section of the first series, and by its second end to a "U” shaped section of the second series. So that the sections all together form a single chain. It will also be understood that because of their narrowness, each of these sections is liable to deform elastically in bending when the elastic part 115 is subjected to stresses. Conversely, when the various sections are deformed, the elastic part itself undergoes a deformation which is the result of the deformations of the individual sections. As already mentioned, the sections form the edges of the inner and outer notches. In these conditions, the degree of opening of the notches, or in other words the spacing between the edges thereof, changes when the sections bend.
  • the picture 3 is a plan view of a timepiece component that conforms to a third exemplary embodiment.
  • the component shown in picture 3 comprises an elastic arm, a base and an element in the form of a perforated plate (referenced respectively 209, 224 and 225).
  • element 225 shares many features with element 125 shown in the figure 2 . This is the reason why only the characteristics which distinguish the third embodiment from the second will be described in detail.
  • the main difference between the two embodiments is that the element of the picture 3 consists of four parts instead of two. In this respect, it can be seen in the drawing that the crown in which the outline of the element 225 is inscribed is divided into four sectors by radial lines in broken lines.
  • the parts of the element 225 which are contained in the four crown sectors are a first and a second connecting part (referenced respectively 213a and 213b) and two elastic parts 215a, 215b.
  • first connecting part 213a is substantially identical to the connecting part 113 of the previous embodiment.
  • the connecting part 213b for its part, has an inner side and an outer side constituted by two concentric circular arcs.
  • the second connecting part is not directly connected with the outside of the element 225, but only serves as a connection between the two elastic parts 215a and 215b. Apart from their length, these are very similar to the elastic portion 115 of the previous embodiment.
  • Each of the two parts elastic has four inner notches 217 which are cut into its inner side and four outer notches 219 which are cut into the outer side.
  • a section delimited by two internal notches 217 always contains an external notch 219, and vice versa. Due to the presence of the interior notches 217, the developed length of the interior edge of either of the elastic parts is equal to at least four times, preferably at least five times, the length of the interior side of the elastic part concerned.
  • the figure 4 , 5 and 6 are different views of a timepiece component which conforms to a fourth particular embodiment of the invention.
  • the component illustrated in these four figures comprises a wheel (referenced 308) and an element in the form of a perforated plate (referenced 325).
  • the wheel 308 is designed to be secured to an axle 310 via the element 325 in the form of a perforated plate.
  • the shaft 310 and the timepiece component together constitute a mobile capable of forming part of a timepiece train.
  • the element 325 in the form of a perforated plate has an opening 311 into which the pin 310 can be driven.
  • the figures 5 and 6 show the watch component attached to the axis 310, while the partial view of the figure 4 shown prior to driving the shaft through the opening 311.
  • the timepiece component according to the third embodiment differs from the timepiece component according to the fourth in one piece with the other parts of the component.
  • the figures indeed show that the element 325 in the form of a perforated plate is fixed to the wheel 308 by means of two flat-headed cylindrical studs (referenced 331 and 333). Taken alone, element 325 shares many characteristics with element 225 illustrated in the picture 3 . We can see first of all that it has the general shape of a crown, and that the latter is subdivided into four crown sectors by radial lines which are drawn in broken lines in the figure 4 .
  • a first pair of crown sectors is occupied by two parts elastics 315a, 315b which are identical.
  • the other pair of crown sectors is occupied by two connecting parts 313a, 313b which are also identical.
  • the two elastic parts 315a and 315b are very similar to the elastic parts 215a, 215b of the previous embodiment. Each of them has four inner notches 317 cut into its inner side and five outer notches 319 cut into its outer side. Inside each elastic part 315a, 315b, a section delimited by two outer notches 319 always contains an inner notch 317, and vice versa.
  • the two connecting parts 313a, 313b for their part, each have an inner side in an arc of a circle and an outer side formed by two rectilinear segments which extend on either side of a wide central notch (referenced respectively 335a and 335b).
  • the central notch of each of the connecting parts 313a, 313b is oriented radially.
  • the figure 4 also shows that the two cylindrical rods 337 of the tenons 331, 333 are engaged laterally in the two notches 335a, 335b.
  • the studs 331, 333 are arranged to secure the element 325 and the wheel (not shown in the figure 4 ), and it will be understood that their presence blocks in particular any rotation of the element 325 in the form of a perforated plate in the plane of the wheel 308.
  • the notches 335a, 335b are shaped so as to allow the side walls of the notches to slide with fatty friction against the cylindrical rods 337 of the tenons 331, 333. This characteristic gives the possibility to the connecting parts 313a, 313b of the element 325 in the form of a perforated plate to move radially.
  • the dimensions of the four crown sectors are chosen so that the edges of the opening 311 exert on the axis 310 an elastic clamping force of sufficient intensity to generate a static binding torque having the effect of securing the element 325 to the axis 310, as long as the mobile transmission torque remains lower than the static connection torque.
  • the value of the static connection torque corresponds to the maximum value that the transmission torque can assume before slipping.
  • the element 25 is no longer secured, but on the contrary it is free to rotate by friction around the axis 310.
  • the possibility of implementing the watchmaking component of the The invention both above and below the slip limit makes it possible to produce slipper clutches, for example.
  • the figure 4 shows the element 325 as it appears prior to the driving of a pin through the opening 311. It can be understood that when the pin 310 is then inserted into the opening, it separates the two connecting parts 313a , 313b by pushing them radially. The maximum spacing is reached when the cylindrical rods 337 of the two studs 331, 333 come into abutment against the bottom of the two notches 335a, 335b. It is the presence of the two elastic parts 315a, 315b which allows the connecting parts 313a, 313b to move apart.
  • the plan view of the figure 5 and the longitudinal sectional view of the figure 6 show the watch component attached to the axis 310.
  • the wheel 308 is a toothed wheel pierced with a central hole 321 allowing the passage of the axis 310.
  • the upper face of the plate of the wheel 308 has a large circular hollow 323 with a flat bottom which is concentric with the central hole.
  • the element 325 in the form of a perforated plate is fixed on the bottom of the recess 323. It can be seen that the two tenons 331, 333 which serve to secure the element 325 with the wheel 308 are driven into two fixing holes which are drilled through the bottom of the recess on either side of the central hole 321.
  • connection between the wheel 308 and the connection parts 313a, 313b has only one degree of freedom , and that the connecting parts can only move radially in the direction of one or the other of the two fixing holes.
  • the axis 310 is formed of a cylindrical rod 341 terminating in a pivot 343 at each end.
  • the cylindrical rod 341 also comprises, close to one of its ends, a collar 345 against which the element 325 in the form of a perforated plate can abut when the axis 310 is driven into the opening 311 by its other end. It will be understood that the function of the collar 345 is to determine the axial positioning of the wheel 308 with respect to the axis 310.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Micromachines (AREA)
EP20190761.5A 2020-08-12 2020-08-12 Uhrkomponente, die eine öffnung zum einpressen einer welle umfasst Pending EP3955064A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP20190761.5A EP3955064A1 (de) 2020-08-12 2020-08-12 Uhrkomponente, die eine öffnung zum einpressen einer welle umfasst

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20190761.5A EP3955064A1 (de) 2020-08-12 2020-08-12 Uhrkomponente, die eine öffnung zum einpressen einer welle umfasst

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EP3955064A1 true EP3955064A1 (de) 2022-02-16

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EP20190761.5A Pending EP3955064A1 (de) 2020-08-12 2020-08-12 Uhrkomponente, die eine öffnung zum einpressen einer welle umfasst

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584994A1 (de) * 2004-04-06 2005-10-12 Nivarox-FAR S.A. Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle
EP2743782A1 (de) * 2012-12-11 2014-06-18 Nivarox-FAR S.A. Vorrichtung zum Zusammenbau von elastischen Armen durch Verformung
EP2755093A2 (de) * 2013-01-14 2014-07-16 Master Dynamic Limited Elastische Entspannungsstruktur einer Haarfederspannbüchse
EP3598242A1 (de) 2018-07-19 2020-01-22 Patek Philippe SA Genève Uhrwerksmechanismus mit nocke
CH715369A2 (fr) * 2018-09-21 2020-03-31 Nivarox Sa Organe de maintien élastique pour la fixation d'un composant d'horlogerie sur un élément de support.

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1584994A1 (de) * 2004-04-06 2005-10-12 Nivarox-FAR S.A. Spiralrolle ohne Deformation des Fixierungsradius der Spiralfeder und Herstellungsverfahren derartige Spiralrolle
EP2743782A1 (de) * 2012-12-11 2014-06-18 Nivarox-FAR S.A. Vorrichtung zum Zusammenbau von elastischen Armen durch Verformung
EP2755093A2 (de) * 2013-01-14 2014-07-16 Master Dynamic Limited Elastische Entspannungsstruktur einer Haarfederspannbüchse
EP3598242A1 (de) 2018-07-19 2020-01-22 Patek Philippe SA Genève Uhrwerksmechanismus mit nocke
CH715369A2 (fr) * 2018-09-21 2020-03-31 Nivarox Sa Organe de maintien élastique pour la fixation d'un composant d'horlogerie sur un élément de support.

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