EP4194965A1 - Betätigungsmechanismus für uhr - Google Patents

Betätigungsmechanismus für uhr Download PDF

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Publication number
EP4194965A1
EP4194965A1 EP21213271.6A EP21213271A EP4194965A1 EP 4194965 A1 EP4194965 A1 EP 4194965A1 EP 21213271 A EP21213271 A EP 21213271A EP 4194965 A1 EP4194965 A1 EP 4194965A1
Authority
EP
European Patent Office
Prior art keywords
branch
star
rocker
flexible
flexible branch
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
EP21213271.6A
Other languages
English (en)
French (fr)
Inventor
Dimitri GLAUS
Julien Giacobino
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 EP21213271.6A priority Critical patent/EP4194965A1/de
Publication of EP4194965A1 publication Critical patent/EP4194965A1/de
Pending legal-status Critical Current

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Classifications

    • 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
    • G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
    • G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
    • G04B19/253—Driving or releasing mechanisms

Definitions

  • the present invention relates to an actuating mechanism for a timepiece comprising a rocker mounted to pivot between a rest position and a fully tilted position, the rocker comprising an actuating arm splitting into two branches, one of the two branches being flexible , and the other branch being rigid, one end of the flexible branch being arranged to push a tooth of a star wheel when the rocker pivots from its rest position to its fully tilted position, the arcuate trajectory of the end of the rigid branch remaining, for its part, always outside the star's head circle, the flexible branch further comprising a backing zone provided to come to rest against a support surface that comprises the rigid branch when the rocker is pivoted from its rest position to its fully tilted position and that, consequently, the end of the flexible branch pushes the tooth of the star, the flexible branch comprising a proximal part oriented substantially radially with respect to the pivot axis of the rocker, and comprising a second part which is oriented transversely with respect to the proximal part and separated
  • THE figures 1A and 1B appended show by way of example the day corrector of a calendar watch of the prior art.
  • a corrector is an actuating mechanism comprising a small button which is most often embedded in the caseband of a timepiece, and which is arranged to cooperate with a star to correct one of the indications displayed by the timepiece. of watchmaking.
  • the user of the watch or a watchmaker can operate the corrector either with the finger or with a special tool called a “pusher”.
  • the concealer shown in both figures 1A and 1B is generally referenced 1. It is in the form of a rocker mounted pivoting around an axis (reference 5).
  • the rocker is formed of an arm which extends from the pivot axis 5 and which is divided into three branches each comprising a distal end.
  • a first distal end is constituted by a button (referenced 3) which can be actuated from outside the timepiece, a second end is arranged to cooperate with a return spring (referenced 7) provided to return the corrector to its rest position.
  • the third end has the shape of a beak (referenced 9) which is arranged to cooperate with the teeth of a seven-pointed star (referenced 11).
  • the star 11 could for example carry a member indicating the days of the week (not shown).
  • the position of star 11 is indexed by a jumper spring (reference 13).
  • FIG 1A illustrates the corrector 1 in the rest position, while the figure 1B shows it in the fully tilted position.
  • the operation of the illustrated correction mechanism is as follows.
  • the corrector 1 When the corrector 1 is in the rest position and the user activates the button 3, he pivots the rocker against the return spring 7.
  • the beak 9 of the corrector meets one of the teeth of the star 11, so that it drives it in rotation.
  • the rotation of the star causes one of the teeth to raise the jumper spring 13, which thus rises until the tip of its slant has crossed the top of the tooth and passed over the other side.
  • the force that the slant exerts on the top of the tooth does not opposes more to the rotation of the star, but on the contrary produces a torque which solicits the star in the direction in which it is already driven. It will therefore be understood that the beak 9 does not need to drive the tooth of the star over the entire distance which separates two consecutive indexed positions. It suffices that the angle over which the beak 9 actually leads the tooth of the star be sufficient to allow the jumper 13 to cross the top of the tooth.
  • star wheel 11 continues its rotation until the next tooth comes up against the rear face of the beak of corrector 1, as illustrated in the figure 1B . It can be seen that in the configuration represented, the corrector 1 and the star 11 block each other by buttressing. Then, when the user releases the button 3, the corrector 1 is returned in the direction of its rest position by the spring 7. However, in order to be able to return to the rest position, the rear face of the spout 9 must first push slightly behind the tooth that blocks it. It will be understood that the rear face of the beak pushes the tooth far enough to allow the beak to pass by sliding against the top of the latter, but sufficiently little so that the jumper spring 13 does not risk returning to the first side of the tooth.
  • correctors such as the one illustrated in the figures 1A and 1B is not free from problems.
  • First of all remember that it is generally inadvisable to use the correctors of a calendar watch between 8:30 p.m. and 3:30 a.m. Indeed, the incrementation of the date indicators by the movement of a calendar watch usually takes place during a period which can last several hours and which is centered around midnight. Under these conditions, if a user decides to actuate the corrector of a date indicator during one of these periods, the opposing forces exerted by the calendar drive mechanism, on the one hand, and by the corrector, on the other hand, risk causing the breakage of part of the mechanism or a phase shift.
  • the drive members prevent any rotation of the stars backwards. It can be noted that the blocking of a star 11 does not prevent the corrector 1 of this star from being actuated once. However, the presence of the tooth of the star 11 which bears against the rear face of the beak 9 (cf figure 1B ) retains the corrector 1 in the fully tilted position, even after its button 3 has been released. The corrector 1 is therefore prevented from returning to the rest position as long as the incrementation of the star 11 is in progress. It will be understood that such a situation is undesirable.
  • actuating mechanisms for timepieces are known which correspond to the definition given above in the introduction.
  • the patent document EP 3 489 766 A1 describes a corrector whose actuating arm separates into two branches, one of the two branches being flexible, and the other rigid.
  • One end of the flexible branch is arranged to push a tooth of a star when the actuating arm pivots from its rest position to its tilted position.
  • the trajectory of the rigid branch meanwhile, always remains outside the trajectory of the star's teeth.
  • the flexible branch comprises two bends which divide it into three parts.
  • a proximal part which is arranged on the side of the actuating arm which is at the rear when the corrector pivots from its rest position to its tilted position, and which is oriented substantially radially with respect to the axis of pivoting, then a second part which is oriented transversely with respect to the proximal part so that it covers the end of the rigid branch, and finally a third part which is folded down in the direction of the pivoting axis of the arm of actuation, so that it is also oriented substantially radially with respect to this axis.
  • the third part is on the side of the actuating arm which is at the front when the corrector pivots from its rest position to its tilted position.
  • the bend between the second and the third part of the flexible branch constitutes the end of the flexible branch which is arranged to push a tooth of the star when the rocker pivots from its rest position to its tilted position.
  • the third part of the flexible branch comprises a backing zone which is provided to bear against a support surface presented by the rigid branch, when the end of the flexible branch pushes the tooth of the star.
  • the bearing surface is formed on the side of the rigid branch which faces forwards when the rocker pivots from its rest position to its tilted position.
  • the corrector of the prior art which has just been described has the advantage of having the possibility of returning to the rest position without pushing the star backwards.
  • its use can lead to difficulties. Indeed, in order not to unduly increase the thickness of the mechanism, it is generally sought to limit the height of the arm for actuating the corrector.
  • the flexible branch must be thin if it is to demonstrate the required elasticity. Under these conditions, it will be understood that the flexible branch is liable to deform in torsion when it is subjected to a torque.
  • the proximal part of the flexible branch is arranged on the rear side of the actuating arm, while its third part is arranged on the front side.
  • the proximal part and the third part are substantially parallel and the distance which separates them is relatively large. Under these conditions, any torsion, even slight, of the proximal part around its axis causes the third part to shift up or down, so that the entire third part is likely to deviate out of plane. pivoting of the actuating arm.
  • the end of the flexible branch which is intended to push a tooth of the star corresponds to the bend between the second and the third part. It will therefore be understood that if the third part deviates out of the pivot plane, the end formed by the elbow risks passing above or below the teeth of the spider, thus compromising the proper functioning of the corrector.
  • 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 an actuation mechanism which is in accordance with appended claim 1.
  • the proximal part of the flexible branch is on the front side of the actuating arm when the rocker pivots from its rest position to its fully tilted position. In addition, it is oriented substantially radially relative to the pivot axis of the rocker.
  • the backing zone that the flexible branch comprises is located on the second part, and the support surface against which the backing zone is arranged to come to rest consists of a straight edge that has the end of the rigid branch, the right edge being oriented substantially tangentially to the arcuate trajectory along which the end of the rigid branch travels when the rocker pivots.
  • the end of the flexible branch which is arranged to push a tooth of the star is formed by the outer side of the elbow which separates the proximal part from the second part of the flexible branch.
  • An advantage of the invention is that the end of the flexible branch which is arranged to push a tooth of the star is located substantially in the extension of the proximal part. Under these conditions, a twist of the proximal part around its axis does not risk shifting said end out of the trajectory of the teeth of the star.
  • the schematic plan views of the figures 2 to 4 attached show an actuation mechanism for a timepiece which constitutes an exemplary embodiment of the invention.
  • the actuation mechanism shown in the figures is designed to be controlled by a user to correct an indication displayed by the timepiece.
  • Such an actuation mechanism that can be controlled from outside the timepiece is known as a “corrector”.
  • the actuation mechanisms which constitute the various embodiments of the invention are not all correctors. Also found among these embodiments are actuating mechanisms which fulfill the function of an automatic drive member for a display mechanism (a calendar mechanism, for example) driven by the movement of a timepiece.
  • the corrector represented in the figures 2 to 4 comprises a control member that can be operated manually from outside the timepiece (symbolized by an arrow referenced 15 in the figures 2 and 3 ), a rocker comprising a single arm (generally referenced 17), and a return spring (referenced 19).
  • the figures also show a star (referenced 21) which has seven teeth.
  • the star could carry a member indicating the days of the week (not shown).
  • the position of star 21 is indexed by a jumper spring (referenced 23) which is biased against the teeth of the star.
  • the corrector rocker is pivotally mounted about an axis (reference 25), and it can be seen that, in the example illustrated, its single arm 17 extends from the pivot axis by successively marking two bends in opposite directions (in the plan views of the figures 2 to 4 , the first bend turns left and the second turns right).
  • the two elbows subdivide arm 17 into three sections. A radially oriented first section that goes from axis 25 to the first bend. Then, a second section which is oriented obliquely with respect to the first section and which goes from the first to the second bend, and finally a third section extending beyond the second bend and which is also oriented substantially radially with respect to the pivot axis 25.
  • the first elbow also has a bulge (referenced 27) with which the control member 15 is arranged to cooperate.
  • the third section of the arm 17 has a bifurcation from which the arm splits into two branches spaced apart from each other. A first of the two branches (referenced 29) is flexible, while the other branch (referenced 31) is rigid.
  • the flexible branch 29 comprises an elastic proximal part (referenced 33) which is oriented substantially radially with respect to the pivot axis 25 of the rocker, and a distal part which consists of a rigid shoe (referenced 35) and which extends facing the end of the rigid branch 31, transversely with respect to the proximal part.
  • the junction between the proximal part 33 and the sabot 35 forms a bend having an acute angle.
  • the proximal part 33 of the flexible branch 29 is approximately rectilinear.
  • the tip 37 of the elbow is arranged to push back a tooth of the star 21 when the rocker pivots from its rest position (represented in the figure 2 ) toward its fully tilted position (i.e., rotates counterclockwise as shown in the figures).
  • the rigid branch 31 is significantly shorter than the flexible branch 29, its arcuate trajectory never meets the teeth of the star 21.
  • the rigid branch 31 and the proximal part 33 of the flexible branch 29 are arranged, one with respect to the other, so that the rigid branch 31 is behind the flexible branch 29 when the lever pivots counterclockwise.
  • the end of the rigid branch 31 is in the form of a straight edge which fulfills the function of bearing surface (referenced 39) and which is oriented tangentially to its arcuate trajectory.
  • the hoof 35 of the branch flexible 29 comprises a backing zone which comes to bear against the bearing surface 39 when the point 37 of the elbow of the flexible branch 29 pushes back a tooth of the spider 21 against the immobilization torque generated by jumper spring 23.
  • the star tooth 21 exerts a reaction force on the tip 37 of the flexible branch.
  • the reaction force is oriented substantially perpendicular to the orientation of the elastic proximal part 33 of the flexible branch, the latter bends under the effect of the stress exerted.
  • the bending of the proximal part 33 of the branch 29 results in a rotation of the end of the proximal part as well as of the sabot 35 (in a direction corresponding to the clockwise direction as represented in the figures ). This rotation causes the portion of the edge of the shoe 35 which is opposite the end of the rigid branch 31 (in other words, the backing zone) to come up against this end, as represented in the picture 3 .
  • the sabot 35 cannot rotate clockwise with respect to the rigid branch, which allows the tip 37 to behave as if it were integral with the latter, despite the resistance offered by the tooth of the star 21
  • the flexible branch 29 must be sufficiently flexible so that the force necessary to bring the sabot 35 into abutment against the end of the rigid branch 31 is less than the force necessary to lift the jumper spring 23.
  • the rotation of the star causes one of the teeth to raise the jumper spring 23, which rises in this way until the tip of its slant has crossed the top of the tooth and passed over the other side.
  • the force that the angle exerts on the top of the tooth no longer opposes the rotation of the star, but on the contrary produces a torque which stresses the star 21 in the direction in which it is already driven.
  • the disappearance of the torque which hitherto opposed the rotation of the star 21 allows the elastic proximal part 33 of the flexible branch 29 to straighten by moving the shoe 35 away from the end of the rigid branch 31.
  • the lever of the corrector When, after having actuated the corrector, the user releases the control member 15, the lever of the corrector is returned in the direction of its rest position by the spring 19. However, the passage that the tip 37 must borrow to return to rest position is now blocked by the tooth of star 21 which follows that which the corrector has just pushed forward.
  • the actuating arm 17 of the corrector is capable of returning to the rest position, even when the automatic incrementation mechanism of the star wheel 21 blocks the rotation of the latter backwards. Indeed, it is possible to separate the tip 37 and the sabot 35 from the trajectory of the teeth of the star 21 by bending the proximal part 33 of the flexible branch 29 in the direction shown in the figure 4 .

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Orthopedics, Nursing, And Contraception (AREA)
EP21213271.6A 2021-12-08 2021-12-08 Betätigungsmechanismus für uhr Pending EP4194965A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP21213271.6A EP4194965A1 (de) 2021-12-08 2021-12-08 Betätigungsmechanismus für uhr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21213271.6A EP4194965A1 (de) 2021-12-08 2021-12-08 Betätigungsmechanismus für uhr

Publications (1)

Publication Number Publication Date
EP4194965A1 true EP4194965A1 (de) 2023-06-14

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ID=78827614

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21213271.6A Pending EP4194965A1 (de) 2021-12-08 2021-12-08 Betätigungsmechanismus für uhr

Country Status (1)

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EP (1) EP4194965A1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9703262B2 (en) * 2014-11-27 2017-07-11 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Annual or perpetual calendar mechanism and timepiece comprising the same
EP3489766A1 (de) 2017-11-27 2019-05-29 Montres Breguet S.A. Mechanismus zur korrektur einer bewegungsfunktion einer uhr
US20190187617A1 (en) * 2017-07-25 2019-06-20 Blancpain Sa Torque smoothing for a timepiece, particularly with a striking mechanism
EP3584643A1 (de) * 2018-06-19 2019-12-25 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Augenblicklich schaltende steuervorrichtung für datumsanzeige von uhren

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9703262B2 (en) * 2014-11-27 2017-07-11 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Annual or perpetual calendar mechanism and timepiece comprising the same
US20190187617A1 (en) * 2017-07-25 2019-06-20 Blancpain Sa Torque smoothing for a timepiece, particularly with a striking mechanism
EP3489766A1 (de) 2017-11-27 2019-05-29 Montres Breguet S.A. Mechanismus zur korrektur einer bewegungsfunktion einer uhr
EP3584643A1 (de) * 2018-06-19 2019-12-25 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Augenblicklich schaltende steuervorrichtung für datumsanzeige von uhren

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