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EP4312083A1 - Kupplungs-ausrückvorrichtung für uhr - Google Patents

Kupplungs-ausrückvorrichtung für uhr Download PDF

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Publication number
EP4312083A1
EP4312083A1 EP22186743.5A EP22186743A EP4312083A1 EP 4312083 A1 EP4312083 A1 EP 4312083A1 EP 22186743 A EP22186743 A EP 22186743A EP 4312083 A1 EP4312083 A1 EP 4312083A1
Authority
EP
European Patent Office
Prior art keywords
stud
axis
opening
members
rotation
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
EP22186743.5A
Other languages
English (en)
French (fr)
Inventor
Julien Giacobino
Dimitri GLAUS
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 EP22186743.5A priority Critical patent/EP4312083A1/de
Publication of EP4312083A1 publication Critical patent/EP4312083A1/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
    • G04B11/00—Click devices; Stop clicks; Clutches
    • G04B11/006—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices)
    • G04B11/008—Clutch mechanism between two rotating members with transfer of movement in only one direction (free running devices) with friction members, e.g. click springs or jumper

Definitions

  • the present invention relates to a clutch-disengagement device for a timepiece, a watch mechanism comprising such a device and a timepiece comprising such a mechanism.
  • a date finger attached to a twenty-four hour wheel, allows the movement of one step each day of a date star. If this finger is rigidly fixed on the twenty-four hour wheel and the user sets the time counterclockwise, the finger pulls the thirty-one star in the wrong direction or can cause breakage, which we want to avoid.
  • the date mechanism 100 illustrated in figures 6a, 6b and 6c includes a device to prevent this. This mechanism is described in the book “Watchmaking theory Edition of the Federation of Technical Schools (FET), Switzerland, 2022”, p 200 . It includes, among other things, a twelve-hour wheel 101, a date star 106 positioned by a jumper 107 as well as a device comprising a twenty-four hour wheel 102, a twenty-four hour finger 103, a pin 104 driven on the wheel 102 and a spring bridge 105, said device connecting the twelve hour wheel 101 and the date star 106.
  • FET Technical Schools
  • the finger 103 of said device has the function of driving the date star 106 in the manner of a conventional finger while being able to retract if the user sets the time by turning the hands counterclockwise.
  • the finger 103 has an inclined plane 108.
  • the operation of the mechanism 100 is as follows. When the twelve-hour wheel 101 rotates clockwise (normal operating direction), the twenty-four hour wheel 102 is rotated counterclockwise. There pin 104 abuts against a first side of the finger 103 and rotates it so that it allows the date star 106 to rotate. If the user sets the time in the counterclockwise, the twenty-four hour wheel 102 turns in the opposite direction (clockwise in the example).
  • the pin 104 meets the other side of the finger 103 and engages under the inclined plane 108.
  • the finger 103 lifts and lets the pin 104 slide.
  • the pin 104 also includes a plane inclined 109 to facilitate the lifting of the finger 103.
  • the device comprising the wheel 102, the finger 103, the pin 104 and the spring bridge 105 is a bulky disengageable torque transmission device, both horizontally in particular due to the length of the blade of the spring bridge 105 and vertically in the to the extent that, when retracting, it requires free space above the finger 103 to allow it to rise.
  • the guidance in the center of the finger 103 and the twenty-four hour wheel 102 must be mastered because good guidance without interference is required to allow the finger 103 to lift without blocking.
  • the device according to the present invention has several advantages.
  • the assembly composed of the stud and the spring makes it possible on the one hand to transmit the torque directly between the two members in the clutch direction (stud) and on the other hand to separate the two members in the disengagement direction. It has limited dimensions horizontally and vertically and the guidance of the first and second organ around the z axis is precise and limits the risk of blockage.
  • the second member comprises a through opening and the first member comprises at least one opening, these openings being arranged so that there is at least one relative angular position of the first and second members called indexing position in which the opening of the second member is aligned with an opening of the first member and in which the stud passes through the opening of the second member to extend into said opening of the first member
  • the device comprises as many indexing positions as openings in the first member.
  • the openings are typically cylindrical holes with axes parallel to the z axis.
  • the vector v essentially comprises a component in z, that is to say that the component along the z axis of the vector v is the majority. Moving the pad essentially along the z axis makes it possible to limit the bulk by limiting the dimension of the components in diameter.
  • the opening(s) of the first member and/or the stud comprise an inclined surface allowing movement of the stud according to the vector v during disengagement.
  • the or each of the openings of the first member comprises a surface parallel to the z axis intended to cooperate with a first surface of the stud parallel to the z axis and the stud comprises a second surface parallel to the z axis, intended to cooperate with a surface of the opening of the second member parallel to the z axis.
  • the first and second members form a rigid connection via the stud so that the first and second members are united in rotation.
  • the first member is typically a toothed wheel kinematically connected to the finishing gear of said timepiece, it is for example an hour toothed wheel.
  • the second member is for its part typically chosen from a toothed wheel, a finger, a set of several fingers and a cam, preferably a snail cam, it is for example a finger or a snail cam intended to cooperate with a flip-flop for triggering a jumping display device.
  • the device for a timepiece according to the invention is useful for controlling the display of any type of indication jumping periodically.
  • the present invention also relates to a watch mechanism comprising a device as defined above. It is preferably a date mechanism.
  • the invention also relates to a timepiece such as a wristwatch, a pocket watch, a clock or a clock comprising such a watch mechanism.
  • a device 1 in reference to the figure 1 , comprises a toothed wheel 2 and a snail cam 3 intended to pivot around a common axis of rotation z.
  • This device 1 is intended to be integrated into the watch mechanism of a timepiece such as a wristwatch, a pocket watch, a clock or even a pendulum.
  • the toothed wheel 2 is typically a 24-hour wheel intended to pivot in a first direction, the clockwise direction in the example illustrated, and to drive the cam 3 with it.
  • the cam 3 for its part typically cooperates with a trigger rocker (not illustrated) pivoting including a feeler.
  • This feeler is held against the cam 3, typically by a spring, so that the rocker pivots by gradually arming the spring during the day then falls suddenly each day when its feeler passes from resting on the point high h to a press on the low point b of the snail cam 3.
  • This cam 3 thus participates in advancing by one step each day a display of the date, the day of the week or the moon phase for example.
  • the 24-hour wheel can be rotated in the direction opposite to its normal operating direction, that is to say in the example illustrated in the direction counterclockwise.
  • the feeler of the aforementioned rocker and the wall of the snail cam 3 connecting its low point b to its high point h can be caused to abut against each other.
  • this situation could lead to deformation or worse, breakage of the device 1 or said rocker.
  • the cam 3 comprises a through cylindrical bore 4, extending parallel to the axis of rotation z.
  • the axis of this drilling 4 is located at a distance d from the axis of rotation z.
  • the toothed wheel 2 also includes a cylindrical drilling 5.
  • the drilling 5 is typically of the same diameter as the drilling 4. It also extends parallel to the axis of rotation z and its axis is located at a distance d from this axis z.
  • the cam 3 carries a stud 6 connected to the cam 3 via a spring 7.
  • the stud 6 has a cylindrical shape, with a diameter slightly smaller than that of the holes 4 and 5.
  • the spring 7 is mounted on the cam 3 by means of a fixing member such as a stud 8. It is arranged so that the axis of the stud 6 is located at the same distance d from the axis of rotation z as the holes 4 and 5.
  • a first part 5a of the wall defining the hole 5 of the toothed wheel 2 abuts against a first part 6a (portion cylinder) of the wall of the stud 6 to rotate the stud 6 clockwise around the z axis.
  • the walls 5a, 6a, 6b and 4a are parallel to each other and arranged perpendicular to the rotational movement around the z axis so that the toothed wheel 2 transmits its torque to the cam 3 via the plot 6 in the most direct way possible.
  • the clearance between the stud 6 and the contours of the holes 4 and 5 guarantees free assembly and ensures that there is no constraint in the spring 7 during the winding function.
  • a second part 5b of the wall defining the hole 5 of the toothed wheel 2 abuts against a third part 6c of the wall of the stud 6, located towards the end of the stud 6, to push the stud 6 with a torque tending to make it pivot counterclockwise around the axis z so that the first part 6a of the wall of the stud 6 abuts against a second part 4b of the wall defining the bore 4 of the cam 3, opposite the first 4a.
  • the third part 6c of the wall of the stud 6 is a surface inclined relative to that 5b of the opening 5 so that, if the torque that the wall 5b must exert on the inclined surface 6c to rotate the stud 6 and the toothed wheel 2 in the counterclockwise direction is greater than a certain value, then this torque causes the stud 6 to slide against the wall 5b and causes a translation of the stud 6 along a vector substantially parallel to the z axis.
  • This threshold value is typically exceeded when the wall of the snail cam 3 connecting its low point b to its high point h abuts against the feeler of the rocker with which the snail cam 3 cooperates.
  • the second part 4b of the wall defining the drilling 4 of the cam 3 allows the guiding of the stud 6 along the z axis.
  • part 6c of the wall of the stud 6 has an inclined surface but one could imagine that it is rather part 5b of the wall defining the hole 5 which has an inclined surface or both.
  • the surfaces intended to slide against each other for the lifting of the stud 6 can thus have different profiles. The invention works from the moment when these surfaces allow sliding of the stud 6 against part 5b of the wall of the toothed wheel 2.
  • the shape and orientation of the holes 4 and 5 and of the stud 6 could be different as long as they allow the disengagement of the toothed wheel 2 and the member 3 by movement of the stud 6 according to a vector having at least one component along the z axis, this component preferably being the majority component of the vector v.
  • the device 1 according to the present invention is a clutch-disengagement device which offers an advantage over the mechanisms of the prior art in terms of size and precision of pivoting around the z axis.
  • FIG. 4 shows a watchmaking device 1' according to a second embodiment which differs from that according to the first embodiment essentially in that the snail cam 3 is replaced by a simple finger 3'. It is typically a 24 hour finger whose function is to drive a date star in the manner of a conventional finger which retracts if the user sets the time by turning the hands in the clockwise direction. counterclockwise. All other considerations relating to the first form of execution remain valid for this second form.
  • Objects bearing the references 2', 6', 7' and 8' at the Figure 4 correspond respectively to the objects bearing the references 2, 6, 7 and 8 to figures 1 to 3 .
  • the finger 3' of the device 1' is indexed relative to the toothed wheel 2', which completes one revolution every 24 hours, so that it allows the star with which it cooperates, typically a date star, a day star or a moon phase star, to be moved by one step each day at midnight.
  • FIG. 5 shows a 1" watch device according to a third embodiment which differs from that according to the second embodiment in that the toothed wheel 2" is typically a 72h wheel and in that the simple finger 3' is replaced by a triple finger 3" (set of three fingers).
  • the toothed wheel 2" has three equidistant holes and the finger 3" has, like the finger 3' and the cam 3, a hole. These holes are all cylindrical, arranged parallel to the axis of rotation z and at the same distance d from this axis of rotation z.
  • there are three distinct indexing positions for the device 1" in which the stud 6" passes through the drilling of the triple finger 3" and is inserts into one of the three holes of the 2" gear.
  • Objects bearing the references 2", 6", 7" and 8" on the Figure 5 correspond respectively to the objects bearing the references 2, 6, 7 and 8 to figures 1 to 3 .
  • the rotation speed of the different members is adapted to the intended use of the device within the timepiece. It can for example be as in the illustrated example of one revolution per 24 hours and typically make it possible to control a display of the date, day of the week or moon phase type. In another example it can be one revolution per month for a jumping display of the month etc.
  • the holes 4, 5 are cylindrical but they can absolutely have another shape. We can more generally speak of openings to designate the possible variants of these drillings. Note also that certain shapes of openings, for example bean-shaped, require less precision as to their distance from the axis of rotation z. In theory, a common point allowing the connection between the first and second members via the stud is sufficient.
  • the spring 7, 7', 7" connecting the stud 6, 6', 6" to the rest of the member 3, 3', 3" which carries it is of sinuous shape. This allows it to be lengthened and therefore to reduce its stiffness while maintaining limited bulk.
  • the spring 7, 7', 7" as well as the pin 8, 8', 8" which allows its attachment are housed in a housing hollowed out in the member 3, 3', 3" which carries it. This allows the overall thickness of the device to be reduced.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Operated Clutches (AREA)
EP22186743.5A 2022-07-25 2022-07-25 Kupplungs-ausrückvorrichtung für uhr Pending EP4312083A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP22186743.5A EP4312083A1 (de) 2022-07-25 2022-07-25 Kupplungs-ausrückvorrichtung für uhr

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22186743.5A EP4312083A1 (de) 2022-07-25 2022-07-25 Kupplungs-ausrückvorrichtung für uhr

Publications (1)

Publication Number Publication Date
EP4312083A1 true EP4312083A1 (de) 2024-01-31

Family

ID=82703143

Family Applications (1)

Application Number Title Priority Date Filing Date
EP22186743.5A Pending EP4312083A1 (de) 2022-07-25 2022-07-25 Kupplungs-ausrückvorrichtung für uhr

Country Status (1)

Country Link
EP (1) EP4312083A1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623582A (en) * 1969-01-16 1971-11-30 Ebauchesfabrik Eta Ag Free-wheel mechanism
JPS50157963U (de) * 1974-06-17 1975-12-27
CH715773A2 (fr) * 2019-01-24 2020-07-31 Richemont Int Sa Système d'entraînement sécurisé.

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3623582A (en) * 1969-01-16 1971-11-30 Ebauchesfabrik Eta Ag Free-wheel mechanism
JPS50157963U (de) * 1974-06-17 1975-12-27
CH715773A2 (fr) * 2019-01-24 2020-07-31 Richemont Int Sa Système d'entraînement sécurisé.

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