EP4361738A1 - Anzeigemechanismus für uhr mit zeitzonen - Google Patents

Anzeigemechanismus für uhr mit zeitzonen Download PDF

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Publication number
EP4361738A1
EP4361738A1 EP23205433.8A EP23205433A EP4361738A1 EP 4361738 A1 EP4361738 A1 EP 4361738A1 EP 23205433 A EP23205433 A EP 23205433A EP 4361738 A1 EP4361738 A1 EP 4361738A1
Authority
EP
European Patent Office
Prior art keywords
correction
input
differential
display mechanism
display
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
EP23205433.8A
Other languages
English (en)
French (fr)
Inventor
Jean-Marie Bouquin
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.)
Richemont International SA
Original Assignee
Richemont International 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 Richemont International SA filed Critical Richemont International SA
Publication of EP4361738A1 publication Critical patent/EP4361738A1/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
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/23—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands
    • G04B19/235—Arrangements for indicating different local apparent times; Universal time pieces by means of additional hands or additional pairs of hands mechanisms for correcting the additional hand or 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/221—Arrangements for indicating different local apparent times; Universal time pieces mechanisms for correcting the hours hand only, i.e. independently for minutes and seconds 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
    • G04B19/00—Indicating the time by visual means
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/223—Arrangements for indicating different local apparent times; Universal time pieces with rotary disc, rotary bezel, or rotary dial
    • 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
    • G04B19/22—Arrangements for indicating different local apparent times; Universal time pieces
    • G04B19/223—Arrangements for indicating different local apparent times; Universal time pieces with rotary disc, rotary bezel, or rotary dial
    • G04B19/225—Arrangements for indicating different local apparent times; Universal time pieces with rotary disc, rotary bezel, or rotary dial driving mechanism for the bezel

Definitions

  • the present invention relates to a display mechanism for a timepiece such as a time zone watch.
  • So-called “universal” display watches typically have a display of local time via a 12 o'clock hand and city names corresponding to the twenty-four time zones all around the dial allowing you to know the time in different places in the world, typically by reading it on a rotating 24-hour graduation, coupled with a 24-hour hand.
  • Dual time zone watches or GMT (Greenwich Mean Time) watches allow the time of two distinct time zones to be displayed simultaneously. Generally, they display the local time called “Local Time” on a 12-hour scale and the time of the place of residence called “Home Time” (or other depending on the user's needs) on a fixed 24-hour scale, in relation to a corresponding needle.
  • GMT Greenwich Mean Time
  • GMT watches have the advantage of allowing simple and intuitive time reading for two time zones but have the disadvantage that for adjustment, the wearer of such a watch must know the time difference existing between the two time zones. 'he wants to display.
  • Watches with a universal display have the advantage of “calculating” themselves the difference between the different time zones, but reading the time in each of these zones is less intuitive.
  • the objective of the invention is to propose a watch comprising an alternative display to those known, typically a watch whose display is hybrid between the two types of display previously described, which allows to display the time of two distinct time zones in an intuitive manner, typically via hands on a dial, and which also allows the user to display the time of the time zone of their choice without necessarily knowing the existing time difference between the two time zones he wants to display.
  • the display mechanism according to the invention typically comprises a disengageable kinematic connection between the finishing gear and the first input when the brake blocks the first input of the differential.
  • the differential of the mechanism according to the invention typically comprises a planet carrier, a sun pinion forming the first input and a ring gear with internal and external teeth forming the second input mounted to pivot around an axis. It also includes a satellite wheel mounted on the planet carrier and meshing both with the sun pinion around which it pivots and with the internal teeth of the ring gear with internal and external teeth.
  • the second indicator member is attached to the satellite carrier which forms the output of the differential.
  • the display mechanism according to the invention comprises a minute pinion associated with the first time zone and driven in rotation by the finishing gear train. It preferably comprises another minute pinion associated with the second time zone and rotated by said minute pinion via a minute return wheel. More preferably, the display mechanism according to the invention comprises another minute return wheel, mounted by friction on said minute return wheel to allow the disengagement of the kinematic connection between the finishing train and the first input when the brake blocks the first input of the differential, said other minute return wheel meshing with a coaxial sun wheel and integral in rotation with the sun pinion.
  • the differential plays the role of the timer.
  • the correction device also comprises a correction rocker comprising a corrector intended to cooperate with the correction star to rotate it.
  • the display mechanism according to the invention preferably comprises a braking lever carrying said brake, the correction rocker being able to actuate the pivoting of the braking lever allowing the blocking of the sun wheel by the brake in coordination with the cooperation of the corrector with correction star.
  • the brake lever typically comprises a groove in which a pin of the correction rocker is housed.
  • the whole thing is typically arranged so that the pivoting of the correction rocker along a first part of the stroke causes the advancement of the pin in a first portion of the groove and the pivoting of the braking lever allowing the blocking of the sun wheel by the brake ; and so that the pivoting of the correction rocker according to a second part of stroke following the first part of stroke also causes the advancement of the pin in a second portion of the groove and thus the pivoting of the correction star d 'a step.
  • the invention also relates to a timepiece such as a wristwatch or a pocket watch comprising such a display mechanism.
  • a display mechanism 1 for a watch makes it possible to simultaneously display the time of a first time zone typically corresponding to the place of residence of the wearer of the watch (home time) and the time of a second time zone of your choice, corresponding for example to a travel location in which the wearer of the watch is located (local time).
  • the time associated with the second time zone is displayed in association with the name of a major city in that time zone.
  • the display mechanism 1 allows simple reading of the time of two distinct time zones, via two hour hands, on fixed time graduations, like a GMT watch. It also allows you to display the time in each of the world's time zones by selecting the city corresponding to the time zone of interest to the user.
  • a watch comprising such a display mechanism 1 allows a user to display the time of two distinct time zones without knowing the time difference separating the two places.
  • the display mechanism 1 typically comprises a frame 100, typically a plate or an additional module board, a home time minute pinion 2 meshing with a first minute return wheel 3 on the barrel of which a second minute return wheel minutes 4 is friction mounted.
  • the minute return wheel 3 meshes with a local time minute pinion 5.
  • the local time minute pinion 5 is intended to pivot relative to the frame 100 around an axis of rotation A1 illustrated in the figures.
  • the display mechanism 1 also comprises a differential gear device, hereinafter called differential 6, of main axis A1, comprising a satellite carrier 61 comprising a lower part 611 and an upper part 612 assembled by screws 613, a satellite pinion 62, a solar mobile 63 comprising a sun wheel 631 and a sun pinion 632 coaxial and integral in rotation with one another, and a crown 64 with internal and external teeth.
  • differential 6 of main axis A1
  • differential 6 of main axis A1
  • a satellite carrier 61 comprising a lower part 611 and an upper part 612 assembled by screws 613
  • a satellite pinion 62
  • a solar mobile 63 comprising a sun wheel 631 and a sun pinion 632 coaxial and integral in rotation with one another
  • a crown 64 with internal and external teeth.
  • the solar pinion 632 (or more generally the solar mobile 63) forms the first input of the differential 6, the crown 64 forms the second input of the differential 6 and the satellite carrier 61 forms the output of the differential 6.
  • the planet pinion 62 is carried by the planet carrier 61. It comprises two pivots, pivoting in stones carried respectively by the lower part 611 and by the upper part 612 of the planet carrier 61.
  • the satellite pinion 62 meshes with the sun pinion 632 around which it can roll when the sun pinion 632 is fixed in rotation and the planet carrier 61 is rotated.
  • the solar mobile 63 is pivotally mounted around the barrel of the local time minute pinion 5 which serves as the central shaft of the differential 6 and its sun wheel 631 meshes with the minute return pinion 4.
  • the upper part 612 of the satellite carrier 61 is integral with a local time hour hand 614. Its hollow barrel is mounted to rotate freely on the barrel of the local time 5 minute hand.
  • the crown 64 is mounted between the upper 612 and lower 611 parts so as to be guided in rotation around the axis A1 by the satellite carrier 61. Its internal teeth mesh with the satellite pinion 62 and its external teeth mesh with a wheel a correction mobile 8 which will be described later.
  • the display mechanism 1 also includes a city display mobile 7 and a time zone correction device comprising the correction mobile 8, a correction rocker 9 and a braking lever 10.
  • the city display mobile 7 comprises a city display disc 71 and a city display wheel 72, coaxial and integral in rotation around an axis, which in the construction example, is parallel to the axis A1. It could be confused with the A1 axis.
  • the correction mobile 8 is pivotally mounted on the frame 100 around an axis of rotation A2. It comprises a first toothed wheel 81 which meshes with the external teeth of the crown 64, a second toothed wheel 82 which meshes with the teeth of the city display wheel 72, and a correction star 83, coaxial and integral in rotation around axis A2.
  • This correction star 83 is typically positioned by a jumper (not illustrated).
  • the purpose of the city display disk 71 is to allow reading, through a window (not illustrated), of a city name chosen by the user, corresponding to the second time zone.
  • the second zone is the “local time” time zone for the user.
  • the local time correction device makes it possible to rotate this city display disc 71 to change the displayed time zone.
  • the correction rocker 9 includes a corrector 91 intended to cooperate with the correction star 83 to rotate it counterclockwise.
  • the correction rocker 9 also comprises, typically at one of its ends, a pin 92, carried by an arm 93 and engaged in a groove 101 of the braking lever 10 (see figures 8 And 9 ).
  • the braking lever 10 carries a brake 102 capable of bearing on the periphery of the sun wheel 631 so as to prevent its rotation during correction of the local time zone.
  • the brake 102 typically comprises, at the end of its arm, teeth 1021, 1022 dimensioned to be able to engage in the teeth of the sun wheel 631 to block its rotation.
  • the arm of the brake 102 is elastically deformable.
  • the operation of the display mechanism 1 is as follows:
  • the finishing train of the watch comprising the display mechanism 1 allows the drive of the home time minute pinion 2 and the home time minute display hand 21 which is attached to it at a rate of one revolution per hour.
  • This gear train also allows, in a traditional manner, the rotation of a home time hour wheel (not shown) and the display hand it carries.
  • the home time minute pinion 2 drives, via the first minute return wheel 3, the rotation of the local time minute pinion 5 and the local time minute hand 51 that she wears.
  • the home 21 and local 51 minute display hands therefore pivot jointly, that is to say at the same speed and in desmodromic connection.
  • the second minute return wheel 4 pivots integrally with the first minute return wheel 3 and rotates the solar mobile 63.
  • the correction mobile 8 is held immobile by the jumper of the correction star 83 and the crown 64 is therefore also.
  • the pivoting of the solar mobile 63 causes the pivoting of the satellite pinion 62 around the solar pinion 632, in the internal teeth of the crown 64 (fixed). This causes the satellite carrier 61 to rotate and therefore the local hour hand 614 which is attached to it.
  • the gear ratios of the different cogs of the differential 6 are chosen so that it plays the role of the timer in that it transmits the rotation of the home time minute pinion 2 to the local hour hand 614.
  • local hour hand 614 rotates advantageously at a rate of one revolution every 24 hours.
  • the user wants to change the time zone displayed by the local time hand 614, he acts on the correction mobile 8 by activating the correction rocker 9, for example via a pusher or a corrector .
  • the correction rocker 9 is arranged to be able to be pivoted clockwise around an axis of rotation A3 illustrated in the figures by the user.
  • the position of the correction rocker 9 illustrated in figure 8 is preferably a “rest” position, the correction rocker 9 being typically held in this position, against a stop (not illustrated) by a return spring (not illustrated).
  • This stop also has the role of preventing the pin 92 from coming out of the groove 101.
  • the return of the correction rocker 9 to said rest position after its actuation is also done by means of said return spring.
  • the correction star 83 being integral with the first 81 and second 82 correction wheels, its pivoting causes the pivoting of the first correction wheel 81 then of the crown 64 with which it meshes.
  • the solar mobile 63 being blocked by the brake 102, the pivoting of the crown 64 in the clockwise direction causes the pivoting of the planet pinion 62 around the sun pinion 632 in the clockwise direction and thus the rotation of the planet carrier 61 in the clockwise direction .
  • the gear ratios are such that each step of the correction star 83 corresponds to the advancement of the display given by the local hour hand 614 by one hour, or by 1/ 24th of coordinated turn and advancement of the display given by the city display disk 71 by one step (also 1/ 24th of a turn) to adapt the corresponding time zone.
  • the correction rocker 9 therefore makes it possible to activate the pivoting of the braking lever 10 which allows the blocking of the sun wheel 631 by the brake 102 in coordination with the cooperation of the corrector 91 with the correction star 83.
  • the second minute return wheel 4 separates in rotation from the first return wheel 3 minutes thanks to its friction assembly so as not to interact with the Home Time time, avoiding any breakage.
  • the home 21 and local 51 minute hands pivot together, the home time hour hand continues to pivot normally and the local hour hand 614 only pivots under the influence of the correction mobile 8, in steps of one hour , together with the city display disk 71.
  • the hour hands can be desynchronized, independently of the minute hands which remain synchronized.
  • the setting is carried out as follows.
  • the display mechanism 1 allows an alternative display to those offered by GMT type watches and by universal watches since it allows the time of two distinct time zones to be displayed (typically place of residence and place of travel (local )), by coordinating the display of the time of one of these zones with the display of the name of the city associated with this time zone (typically for local time).
  • This display mechanism 1 makes it possible to have a display of the time of the place of residence and a display of the local time, which are synchronized and advance together in normal operation, while the city disc remains in its aperture.
  • the time of the place of residence is displayed by the main hands, the local time by additional hands and in a manner coordinated with the reference city of the local zone.
  • the cog associated with the first time zone controls the rest of the caliber information (calendar and other).
  • the shape of the different organs can vary infinitely as long as their functions are ensured.
  • the number of teeth of the different toothed rotating members can vary while maintaining gear ratios consistent with the desired display.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
EP23205433.8A 2022-10-25 2023-10-24 Anzeigemechanismus für uhr mit zeitzonen Pending EP4361738A1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH001255/2022A CH720155A1 (fr) 2022-10-25 2022-10-25 Mécanisme d'affichage pour montre à fuseaux horaires.

Publications (1)

Publication Number Publication Date
EP4361738A1 true EP4361738A1 (de) 2024-05-01

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP23205433.8A Pending EP4361738A1 (de) 2022-10-25 2023-10-24 Anzeigemechanismus für uhr mit zeitzonen

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EP (1) EP4361738A1 (de)
CH (1) CH720155A1 (de)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1591752A (de) * 1967-11-14 1970-05-04
CH665930GA3 (en) * 1986-07-30 1988-06-30 Wrist watch with supplementary hour hands for different zones - selects hands by rotation of subsidiary 24-hour dials, not driven by movement, performing differential hand rotation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1591752A (de) * 1967-11-14 1970-05-04
CH665930GA3 (en) * 1986-07-30 1988-06-30 Wrist watch with supplementary hour hands for different zones - selects hands by rotation of subsidiary 24-hour dials, not driven by movement, performing differential hand rotation

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CH720155A1 (fr) 2024-04-30

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