EP4336274A1 - Mecanisme d'actionnement pour une aiguille d'affichage flexible - Google Patents

Mecanisme d'actionnement pour une aiguille d'affichage flexible Download PDF

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Publication number
EP4336274A1
EP4336274A1 EP23193013.2A EP23193013A EP4336274A1 EP 4336274 A1 EP4336274 A1 EP 4336274A1 EP 23193013 A EP23193013 A EP 23193013A EP 4336274 A1 EP4336274 A1 EP 4336274A1
Authority
EP
European Patent Office
Prior art keywords
roadway
flexible display
actuation mechanism
display needle
flexible
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
EP23193013.2A
Other languages
German (de)
English (en)
French (fr)
Inventor
Lionel Matthey-De-L'endroit
Marc Stranczl
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.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
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 Montres Breguet SA filed Critical Montres Breguet SA
Publication of EP4336274A1 publication Critical patent/EP4336274A1/fr
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
    • G04B19/04—Hands; Discs with a single mark or the like
    • G04B19/048—Hands; Discs with a single mark or the like having the possibility of indicating on more than one scale, e.g. hands with variable length which work on different scales
    • 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
    • G04B19/02—Back-gearing arrangements between gear train and hands
    • 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
    • G04B13/007—Gearwork with differential work
    • 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
    • G04B19/04—Hands; Discs with a single mark or the like

Definitions

  • the present invention relates to an actuation mechanism for a flexible display needle.
  • the present invention concerns flexible display needles.
  • Such needles already known in the state of the art, comprise a first drive barrel connected to a first end of a first flexible arm, and a second drive barrel connected to a first end of a second arm flexible. At their second end, the first and second flexible arms are connected together by a point.
  • the first and second drive guns are spaced apart.
  • a service position in which the flexible display needle has a defined shape and length is a constrained position in which the first drive barrel and the second drive barrel are arranged coaxially around a same axis of rotation.
  • the first drive barrel is mounted with a first defined preload angle
  • the second drive gun is mounted with a second defined preload angle in the opposite direction to that of the first drive gun.
  • the flexible display needle is arranged to change shape and length in a desired manner when the angular position of the second drive barrel varies relative to the angular position of the first drive barrel by pivoting about the axis of rotation.
  • the first flexible arm of the flexible display needle performs an angular rotation ⁇ 1 which is applied by a clockwork movement to the flexible display needle to display the information.
  • the angular rotation ⁇ 1 applied by the clockwork movement to the flexible display needle being modulated by an angle of rotation ⁇ by an actuation mechanism, this angle of rotation ⁇ , applied to the second flexible arms of the flexible display needle, determines the rotation and change of shape and length of the flexible display needle.
  • Mechanisms for actuating a flexible display needle of variable length are already known in the state of the art. These different actuation mechanisms are all based on the same operating principle: an angular rotation ⁇ 1, applied to an input of the actuation mechanism by the watch movement, is modulated by an angle of rotation ⁇ by this actuation mechanism, this angle of rotation ⁇ , applied with an opposite direction to the first and second flexible arms of the flexible display needle, determining the rotation and the change in shape and length of the flexible display needle.
  • the flexible display needles describe trajectories of various shapes (circular, oval, triangular, etc.) on a single revolution; that is, from a certain starting point, the flexible display hands make a complete revolution deforming in the desired way, then return to their starting point and the process starts again from the beginning.
  • the present invention aims to provide an actuation mechanism for a flexible display needle making it possible to vary the trajectories described by such a flexible display needle when it is driven by such an actuation mechanism.
  • the present invention relates to a mechanism for actuating a flexible display needle comprising a first drive barrel connected to a first end of a first arm flexible, and a second drive barrel connected to a first end of a second flexible arm, the first and second flexible arms being interconnected by a point at their second end, the first barrel being mounted with a first preload angle defined, and the second barrel being mounted with a second defined preload angle in the opposite direction to that of the first barrel, so that the flexible, elastically preloaded display needle constantly keeps the entire actuation mechanism under tension in normal operating mode of the actuation mechanism, the actuation mechanism comprising a first road on which the first drive barrel of the flexible display needle is driven, this first road being driven by a clockwork movement , this first road driving an intermediate mobile which in turn drives a second road on which the second drive gun is driven, the flexible display needle moving between an initial position and a final position in which it makes a jump to return to its initial position, the flexible display needle changing shape and length in a desired manner during this
  • the present invention provides an actuating mechanism arranged so as to drive a flexible display needle for example over two complete turns, the second turn having a geometry different from the first. From a determined initial starting point, the flexible display needle makes a first turn, then a second turn following the first before returning to its initial starting point and repeating the trajectory again.
  • the actuation mechanism according to the invention is also distinguished by its simplicity and its small height.
  • the actuation mechanism comprises a friction clutch intended to be arranged between a time setting mechanism capable of being controlled by a crown, and the first roadway, the time setting mechanism and the crown being included by the watch movement, the friction clutch being configured so that, when the crown occupies a time setting position and is biased so as to move the hand flexible display needle in the clockwise direction, it transmits a torque to the first roadway in order to drive said flexible display needle in the clockwise direction.
  • the friction clutch is configured so that, when the crown is pressed, when it is in the time setting position, to move the display hand flexible counterclockwise, it slides when subjected to a torque greater than a predefined threshold.
  • the first and second carriageways find themselves in direct engagement via the pin which precisely positions the second carriageway relative to the first carriageway so that the first carriageway not only drives the second carriageway, but also the intermediate mobile until a moment when the second roadway finds itself again in engagement with the intermediate mobile, the position of the pin making it possible to ensure that the resumption of the drive is done correctly by avoiding blocking points on point.
  • the present invention proceeds from the general inventive idea which consists of providing, in a watch movement, an actuation mechanism for a flexible display needle making it possible to vary the trajectories described by such a flexible display needle. More precisely, the actuation mechanism according to the invention is designed to drive a flexible display needle so that this flexible display needle, starting from an initial starting point, successively makes a first, then a second turn. whose geometry differs from the first lap, before returning to its initial starting point from the end of its second lap and repeating the same trajectory again.
  • One of the advantages of the present invention lies in the fact of being able to display ranges of values different from the quantity displayed on each of the first and second turns.
  • the actuation mechanism according to the invention also turns out to be very simple and takes up little space in height.
  • the embodiment of the actuation mechanism according to the invention which will be described below by way of non-limiting example only can allow the display of a 24-hour time indication.
  • a typical example concerns the display of the current time for which we can thus display the midnight-noon time slot on the first turn, and the noon-midnight time slot on the second turn.
  • FIG. 1 Designated as a whole by the general numerical reference 1, a flexible display needle capable of being driven by an actuation mechanism according to the invention is illustrated in the figure 1 .
  • This flexible display needle 1 comprises a first drive barrel 2 connected to a first end of a first flexible arm 4, and a second drive barrel 6 connected to a first end of a second flexible arm 8. A their second end, the first and second flexible arms 4 and 8 are connected together by a point 10.
  • the first and second drive guns 2, 6 are spaced apart from each other.
  • a service position in which the flexible display needle 1 has a defined shape and length is a constrained position in which the first drive barrel 2 and the second drive barrel 6 are arranged coaxially around of an axis of rotation D (see figure 2 ).
  • the first drive barrel 2 is mounted with a first defined preload angle
  • the second drive barrel 6 is mounted with a second defined preload angle in the opposite direction to that of the first drive gun.
  • the flexible display needle 1 is arranged so as to change shape and length in a desired manner when the angular position of the second drive barrel 6 varies relative to the angular position of the first drive barrel 2 by pivoting around the axis of rotation D.
  • This actuation mechanism 12 comprises a first carriageway 14 on an axis 15 from which the first drive barrel 2 of the flexible display needle 1 is driven.
  • This first carriageway 14 is driven by a clockwork movement (not shown), for example clockwise.
  • the driving of the first roadway 14 by the clockwork movement can be done directly or with the interposition of a gear train.
  • the first roadway 14 therefore plays a driving role in the operation of the actuation mechanism 12. More precisely, this first roadway 14 drives a first intermediate wheel 16 of an intermediate mobile 18 in a counterclockwise direction. This intermediate mobile 18 also comprises a second intermediate wheel 20 coupled in rotation with the first intermediate wheel 16 and which therefore also turns counterclockwise. Finally, the actuation mechanism 12 comprises a second roadway 22 driven in rotation in the clockwise direction by the second intermediate wheel 20. This second roadway 22, mounted freely in rotation on the axis 15 of the first roadway 14, comprises an axis 24 on which the second drive barrel 6 is driven. It will be understood that the meshing between the first and second carriageways 14, 22 on the one hand, and the intermediate mobile 18 on the other hand, can be done directly or by the through additional pinions and wheels.
  • the actuation mechanism 12 is also characterized in that the second roadway 22 is provided with a pin 26 which projects into a light 28 cut out in the board of the first roadway 14.
  • This light 28 in the shape of an arc of circle centered on the center of the first roadway 14, is delimited at its two ends by a first and a second bottom 30 and 32 respectively and extends over an angular sector of 162.5° in the non-limiting example illustrated in the drawing.
  • This value of the angular sector is determined by the change in shape and length desired for the flexible display needle 1 to which an additional angular sector must be added to take into account the size of the pin 26, for example 20°, as well as a safety margin, typically 2.5°.
  • the second intermediate wheel 20 has, at one location on its perimeter, a sector 34 devoid of teeth. The role of these different elements will be detailed below.
  • first roadway 14 is driven by the clockwise movement at a rate of one revolution per day.
  • first roadway 14, engaged with the first intermediate wheel 16 causes the latter to rotate counterclockwise, which causes the second intermediate wheel 20 to rotate counterclockwise as well.
  • second intermediate wheel 20 drives the second roadway 22 clockwise.
  • the second carriageway 22 performs less of one lap per day (0.799). This has the effect that the first and second flexible arms 4, 8 of the flexible display needle 1 move away from each other, while the pin 26 begins to move into the slot 28.
  • the distance angular ⁇ which separates the pin 26 from the first bottom 30 represents the phase shift applied to the first and second flexible arms 4, 8 of the flexible display needle 1 by the actuation mechanism 12 actuated by the clockwork movement (see Figure 3 ).
  • the second intermediate wheel 20 continues to rotate in the counterclockwise direction until the last tooth A by which the second roadway 22 was still in engagement with the second intermediate wheel 20 disappears and the sector 34 devoid of tooth of this second intermediate wheel 20 is found facing the second roadway 22.
  • the second roadway 22 thus catches up with the phase shift ⁇ which separated it from the first roadway 14 and which had reached 140° at the end of the second revolution of the flexible display needle 1. In fact, the light extends over 162.5° , but the second roadway 22 only turns 140°.
  • the pin 26 abuts against the bottom 30 of the light 28 and the phase shift ⁇ between the first and second roads 14, 22 is canceled (see figure 5 ).
  • the toothless sector 34 of the second intermediate wheel 20 is still facing the second roadway 22 which is therefore always free.
  • the elastic tension to which the flexible display needle 1 is subjected maintains the pin 26 at the bottom 30 of the light 28, so that the first and second roads 14, 22 are coupled in rotation.
  • the first roadway 14 turns and in turn drives the second roadway 22. Given that these first and second roadways 14, 22 are in direct mesh and that there is no gear ratio between them, these two roadways 14 , 22 rotate at the same speed. Consequently, during this phase of operation of the actuating mechanism 12, the trajectory of the flexible display needle 1 is circular.
  • the first roadway 14 drives not only the second roadway 22, but also the first and second intermediate wheels 16, 20.
  • a moment therefore arrives when the second roadway 22 finds itself engaged with the second intermediate wheel 20.
  • a change in the drive of the second roadway 22 therefore occurs at this moment: from a direct connection with the first roadway 14, the second roadway 22 finds itself driven again in a standard manner by the second intermediate wheel 20.
  • Adjusting the position of the pin 26 is crucial because it ensures that, when driving resumes, the second roadway 22 meshes with the second intermediate wheel 20 without tip-to-tip type blocking. .
  • the tip 10 of the flexible display needle 1 describes a spiral trajectory over two revolutions (see figure 8 ).
  • the second intermediate wheel 20 makes a complete revolution given that the return of the flexible display needle 1 towards its initial position occurs when the toothless sector 34 of the second intermediate wheel 20 finds itself facing the second roadway 22.
  • the actuating mechanism 12 can be arranged so that the flexible display needle 1 makes several jumps at each turn.
  • the actuating mechanism 12 comprises a friction clutch 41 intended to be arranged between the first roadway 14 and a time setting mechanism 42 comprising a time setting gear controlled by a winding crown 43. These characteristics are represented schematically on the figures 11 and 12 .
  • the time setting mechanism 42 and the crown 43 are included in the watch movement in which the actuating mechanism 12 according to the invention is intended to be arranged and are known as such to those skilled in the art.
  • the crown 43 is able to control the time-setting mechanism 42, that is to say, to act on the latter, when it occupies a time-setting position.
  • the friction clutch 41 is configured so as to transmit , up to the first roadway 14, all or part of a torque to which it is subjected by the time setting mechanism 42, in order to drive the flexible display hand 1 in the clockwise direction.
  • This scenario is represented on the Figure 11 , in which the transmission of movement is symbolized by the thick line arrows.
  • the friction clutch 41 When the crown 43 is biased, when it is in the time setting position, so as to move the flexible display hand 1 counterclockwise, the friction clutch 41 is configured to slide when it is subjected to a torque greater than a predefined threshold, so as to avoid the transmission, to the first roadway 14, of too high a torque.
  • the torque reaches this predefined threshold when the flexible display needle 1 occupies its initial position and the crown 43 is biased so as to drive the needle to make the jump to its final position.
  • the friction clutch 41 makes it possible to transmit a torque from the crown 43 to the first carriageway 14 so as to move the flexible display needle 1, counterclockwise, from its final position to its initial position, but interrupts this torque transmission when it occupies its initial position.
  • This arrangement therefore makes it possible to avoid any blocking or breakage of the actuation mechanism 12 which would occur if the flexible display needle 1 attempted to jump from its initial position to its final position.
  • This scenario is represented on the Figure 12 , in which the thin line arrows represent the non-transmission of movement.
  • the friction clutch 41 can be formed by any clutch known to those skilled in the art, such as a foil, an arm clutch, a friction drive wheel, etc., and is arranged in the setting gear. on time.
  • the friction clutch 41 is located between a pinion flowing and the first roadway 14 and is therefore not activated during manual winding of the movement which passes through a winding pinion to a ratchet known as such to those skilled in the art.
  • the watch movement also includes a time setting clutch, not shown in the figures, intended to be arranged between the first carriageway 14 and a finishing train.
  • a time setting clutch makes it possible, when setting the time, to decouple, beyond a certain torque threshold, the first roadway 14 and the finishing train so as not to damage the train. finishing or an exhaust kinematically linked to the finishing gear.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Measurement Of Distances Traversed On The Ground (AREA)
  • Road Signs Or Road Markings (AREA)
EP23193013.2A 2022-09-08 2023-08-23 Mecanisme d'actionnement pour une aiguille d'affichage flexible Pending EP4336274A1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22194637 2022-09-08

Publications (1)

Publication Number Publication Date
EP4336274A1 true EP4336274A1 (fr) 2024-03-13

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ID=83270867

Family Applications (1)

Application Number Title Priority Date Filing Date
EP23193013.2A Pending EP4336274A1 (fr) 2022-09-08 2023-08-23 Mecanisme d'actionnement pour une aiguille d'affichage flexible

Country Status (4)

Country Link
US (1) US20240085853A1 (ja)
EP (1) EP4336274A1 (ja)
JP (1) JP2024039005A (ja)
CN (1) CN117666315A (ja)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2863274A1 (fr) * 2013-10-18 2015-04-22 Omega SA Aiguille élastique flexible
EP2498145B1 (fr) * 2011-03-08 2017-07-12 Montres Breguet SA Mécanisme de sonnerie à sonneries différenciées

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2498145B1 (fr) * 2011-03-08 2017-07-12 Montres Breguet SA Mécanisme de sonnerie à sonneries différenciées
EP2863274A1 (fr) * 2013-10-18 2015-04-22 Omega SA Aiguille élastique flexible

Also Published As

Publication number Publication date
JP2024039005A (ja) 2024-03-21
US20240085853A1 (en) 2024-03-14
CN117666315A (zh) 2024-03-08

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