EP3644134A1 - Feststellvorrichtung für schwingungssystem - Google Patents

Feststellvorrichtung für schwingungssystem Download PDF

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Publication number
EP3644134A1
EP3644134A1 EP19204862.7A EP19204862A EP3644134A1 EP 3644134 A1 EP3644134 A1 EP 3644134A1 EP 19204862 A EP19204862 A EP 19204862A EP 3644134 A1 EP3644134 A1 EP 3644134A1
Authority
EP
European Patent Office
Prior art keywords
stop device
braking member
stop
balance
ring
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.)
Granted
Application number
EP19204862.7A
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English (en)
French (fr)
Other versions
EP3644134B1 (de
Inventor
Karsten Fraessdorf
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.)
Watch Connaisseur Project SA
Original Assignee
Watch Connaisseur Project SA
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Filing date
Publication date
Application filed by Watch Connaisseur Project SA filed Critical Watch Connaisseur Project SA
Publication of EP3644134A1 publication Critical patent/EP3644134A1/de
Application granted granted Critical
Publication of EP3644134B1 publication Critical patent/EP3644134B1/de
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Anticipated expiration legal-status Critical

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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
    • G04B27/00—Mechanical devices for setting the time indicating means
    • G04B27/004—Mechanical devices for setting the time indicating means having several simultaneous functions, e.g. stopping or starting the clockwork or the hands

Definitions

  • the present invention relates generally to a stop device for an oscillating system of a watch movement, mounted in a watch, in the field of watchmaking.
  • this system has the particular disadvantage of not making it possible to stop or brake a pendulum without the pendulum serge (that is to say having no radially peripheral contour).
  • the stop device causes the application of forces on the radially peripheral contour, which is damaging for the balance, a balance shaft or the mounting of the balance and shaft assembly in movement, disturbs the good adjustment of the operating and geometry clearances, and causes premature wear of the movement parts.
  • stopping the oscillating system is imprecise, slow and not very reproducible, due to the sliding of the spring on the radially peripheral contour of the balance, and is bulky.
  • An object of the present invention is to respond to the drawbacks of the document of the prior art mentioned above and in particular, first of all, to provide a device for stopping the oscillating system fast, precise and reliable, applicable both for a pendulum provided with a serge only for a pendulum without serge, with a reduced bulk.
  • the double tray comprises at least one large tray and at least one small tray.
  • the braking or brake member has at least two positions, a first position in which the brake is at a distance from the large plate of the double plate and a second position in which the brake is in contact with the large plate of the double plate. , so as to brake and stop it.
  • the stop device for a rapid, precise, reliable oscillating system, avoiding jolts, slipping or jamming.
  • the stop device since the application of the braking force is not made on a radially peripheral contour of the pendulum, the stop device is suitable both for a pendulum with balance rod and for a balance without balance rod.
  • the device reduces the mechanical stresses on the balance wheel, on the balance shaft and on the associated movement parts, so as to guarantee good behavior over time and performance preservation over the long term.
  • this makes it possible to propose a device for stopping reduced overall dimensions.
  • the balance shaft has an axis of rotation
  • the braking member is movable in translation in a direction parallel to the axis of rotation of the balance shaft.
  • the braking member comprises at least one portion of a ring arranged to come into contact with the large plate.
  • the ring portion of the braking member comprises at least two braking portions arranged at 180 ° from one another relative to the balance shaft. This limits the overturning torques on the balance shaft.
  • the double tray further comprises a small tray, and an outside diameter of the large tray is larger than an outside diameter of the small tray.
  • a value of the diameter of the large plate is greater than at least two times, preferably three times, very preferably four times the value of the diameter of the small plate.
  • the large plate has a peripheral annular contact surface, and the braking member comes into contact with the large plate at its annular contact surface.
  • the large plate has a peripheral annular contact surface, and the braking member comes into contact with the large plate at its annular contact surface, on the side of its outside diameter, at a flat peripheral surface. .
  • a contact surface between the double plate and the braking member is greater than 1 mm 2 , preferably 5 mm 2 .
  • the large plate has an annular surface arranged to be braked by the braking member, and a contact surface between the double plate and the braking member is greater than 90%, preferably 95% of the annular surface of the double. tray.
  • the large plate has a ring-shaped annular surface arranged to be braked by the braking member, and the braking member has a ring-shaped surface arranged so as to match the surface of the large plate.
  • the braking member has a braking surface
  • the large plate has an annular surface arranged parallel to the braking surface of the braking member both when the braking member is in the braking position and when the 'braking member is spaced from the large plate, and arranged to be braked by the braking member.
  • the braking member comprises at least a first portion of ring arranged to come into contact with the large plate, a second ring and at least one connecting shaft arranged to make integral the first portion of ring and the second ring and to be in slide connection with a cage base of the watch movement, the first ring portion and the second ring being located on either side of the cage base.
  • the cage can be a tourbillon cage or a movement cage.
  • the stop control lever is connected to the second ring.
  • the stop control lever is arranged to lift or move the second ring.
  • the stop device further comprises at least one return spring arranged to return the braking member.
  • the stop device further comprises at least one return spring arranged to return the second ring.
  • the return spring has a high stiffness and is arranged to avoid inadvertent contact of the braking member on the large plate in the event of an impact.
  • the oscillating system further comprises a shock absorber mounted in a watch movement bridge, the shock absorber comprising at least one chimney arranged to receive one end of the balance shaft on the side opposite to the member. braking, so as to allow a translation of the balance shaft parallel to a translation of the braking member.
  • the balance shaft comprises an abutment portion on the side opposite to the braking member and in which there is a predetermined clearance between the chimney and the abutment portion.
  • the balance shaft is arranged so as to position the abutment portion at a safe distance from the chimney.
  • a stroke of the braking member is greater than or equal to the predetermined clearance between the chimney and the abutment portion.
  • chimney is meant a guide and / or passage hole and a stop part arranged opposite the abutment portion of the balance shaft.
  • the pendulum shaft is, in other words, a shouldered shaft or includes a shoulder. It can typically be considered that the predetermined play is of the order of 5/100 e of mm, and that the stroke of the braking member is 8/100 e of mm.
  • the shock absorber further comprises at least one kitten, a ruby, a counter-pivot and a damping spring.
  • the shock absorber has an admissible stroke before the opening of the damping spring greater than the predetermined clearance between the chimney and the abutment portion.
  • admissible stroke of the shock absorber means a second predetermined clearance between the ruby and the counter-pivot, typically of the order of 8 / 100th mm.
  • the stop device further comprises a lever rocker arranged to cooperate with the control lever and a watch winding rod.
  • control lever comprises a portion of cam, arranged to be in contact with the lever rocker.
  • the cam portion has a curved portion, arranged to be in contact with the lever rocker, so as to allow a movement of the lever rocker to be transformed into a perpendicular movement of the control lever.
  • the movement further comprises a pull lever lever, a pull spring and a sliding pinion.
  • control lever further comprises an attachment end, fixed to a fixed plate secured to a watch case, and a movable end arranged to come into contact with the braking member.
  • the cam portion is located between the attachment end and the movable end, at a distance at least equal to one third of a movable length of the control lever, counted from the attachment end.
  • a second aspect of the present invention relates to an oscillating system comprising a stop device according to the first aspect.
  • a third aspect of the present invention is a watch movement comprising a stop device for an oscillating system according to the first aspect or an oscillating system according to the second aspect.
  • a fourth aspect of the present invention is a watch comprising a stop device for an oscillating system according to the first aspect, an oscillating system according to the second aspect or a watch movement according to the third aspect.
  • the figure 1 shows a stop device for an oscillating system of a watch movement according to the present invention, in a stopped position.
  • the stop device 100 is shown in a position in which it brakes or stops the oscillating system 200, and is a sectional view CC of the figure 7 .
  • the oscillating system 200 comprises a balance shaft 9, a balance 9.1 mounted on the balance shaft 9, a hairspring 9.5 not shown here for the sake of clarity in the figure (but shown in figure 9 ) cooperating with the pendulum 9.1 and allowing oscillation according to a principle well known in watchmaking.
  • the oscillating system 200 further comprises a double plate 8 with at least one large plate 8.1 and a small plate 8.2, mounted on the balance shaft 9.
  • the diameter of the large plate 8.1 is at least twice, preferably three times, very preferably four times the diameter of the small plate 8.2.
  • the pendulum 9.1 comprises at least one balancing mass 9.2 and at least one balancing screw 9.3, so as to ensure proper balancing of the pendulum 9.1, and more generally, the proper balancing of the oscillating system 200.
  • the stop device 100 comprises at least one stop control lever 6 and a braking member 7 connected to the stop control lever 6, and arranged to brake the double plate 8 by coming into contact with the large plate 8.1 of the double plate 8.
  • the braking member 7 comprises at least a first portion of ring 7.4 arranged to come into contact with the large plate 8.1 of the double plate 8, a second ring 7.1 and at least one connecting shaft 7.3 arranged to make the first portion integral ring 7.4 and the second ring 7.1 and to be in sliding connection with a cage base 20 of the watch movement 301, the first portion of ring 7.4 and the second ring 7.1 being located on either side of the base cage 20.
  • the first ring portion 7.4 is a ring part, which includes a recess to allow free passage to an exhaust system of the watch movement 301, cooperating with the oscillating system 100, in particular the double plate 8 and the balance wheel 9.1, which cooperation between the exhaust system and the oscillating system 200 is well known to those skilled in the art.
  • the second ring 7.1 is connected to the stop control lever 6 in order to transmit the movement thereof.
  • the sliding link between the connecting shaft 7.3 and the cage base 20 provides movement of the braking member 7 parallel to the axis of rotation of the balance shaft 9.
  • the first ring portion 7.4 of the braking member 7 is shown in contact with the large plate 8.1 of the double plate 8.
  • the stop control lever 6 receives a brake command or d stop by the user, the stop control lever 6 is actuated towards the second ring 7.1 of the braking member 7 (that is to say towards the top of the figure 1 as shown) and drives the braking member 7 in translation.
  • the first portion of ring 7.4 then follows this translation and comes into contact with the large plate 8.1 in order to brake and stop it, thus stopping the balance shaft 9 and the balance wheel 9.1.
  • the translational braking movement is transmitted to the balance shaft 9 which abuts on the upper cage bridge 10.
  • the upper cage bridge 10 also acts as a piton holder cooperating with the hairspring 9.5.
  • the balance shaft 9 further comprises a balance shaft end 9.4 arranged to be received or housed by a shock absorber 11, such as a shock absorbing device available commercially, for example from the company Incabloc , and as it will be described in figures 3 and 4 , representing an enlargement of zone D of Figures 1 and 2 .
  • the braking member 7 further comprises a return spring 7.2 arranged to return the braking member 7.
  • the return spring 7.2 is connected at one end to the second ring 7.1 and to a second end at the base of the cage 20
  • the spring 7.2 makes it possible to recall the braking member 7 but also to avoid inadvertent braking of the balance wheel 9.1 in the event of an impact or sporty wear of the watch, in order to avoid any drift in the time indication of the watch and needle stroke.
  • the figure 2 represents the device for stopping the figure 1 , in a free position, that is to say without braking,
  • figure 2 stands out from the figure 1 in that it illustrates the braking member 7 in a free position, that is to say without braking.
  • the first portion of ring 7.4 is not in contact with the large plate 8.1 of the double plate 8. It therefore does not brake or stop not the oscillating system 200, and the balance wheel 9.1 and the balance shaft 9 are thus free to continue their periodic rotations.
  • the stop control lever 6 is held at a distance from the second ring 7.1 so as not to brake the oscillating system 200.
  • the return spring 7.2 ensures the maintenance of the second ring 7.1, thus making it possible to avoid any contact with the braking 7 with the large plate 8.1 of the double plate 8, in particular in the event of an impact or sporty wearing of the watch.
  • the figure 3 shows an enlargement of the stop device 100 according to the present invention at the end of the balance shaft 9.4, in the stop position.
  • the figure 3 uses the same embodiment as the figure 1 , in the same stop position.
  • the shock absorber 11 comprises at least one chimney 11.1, at least one kitten 11.5, at least one ruby 11.3 placed, housed in or carried by the kitten 11.5, at least one counter-pivot 11.4 and at least one spring depreciation 11.2.
  • chimney 11.1 is meant a guide and / or passage hole in the shock absorber 11 and a stop part of the shock absorber 11 arranged opposite a stop portion of the end of the balance shaft 9.4.
  • the spring 11.2 makes it possible to retain the counter-pivot 11.4 in the event of an impact and the ruby 11.3 guides the end of the balance shaft 9.4 in order to ensure guidance with the minimum possible friction.
  • the figure 4 shows the enlargement of the stop device 100 according to the present invention at the end of the balance shaft 9.4, in the free position.
  • the figure 4 uses the same embodiment as the figure 2 , in the same free position. It illustrates the difference in position with the figure 3 .
  • the figure 4 shows a predetermined clearance 11.7 between the stop part of the chimney 11.1 and the stop portion 9.4.
  • This predetermined clearance 11.7 is typically of the order of 5 / 100th mm, and is less than the admissible stroke of the shock absorber 11.
  • the admissible stroke of the shock absorber 11 is the stroke available before the opening of the damping spring 11.2, between the ruby 11.3 and the counter-pivot 11.4, typically of the order of 8 / 100th mm.
  • the figure 5 represents the watch movement according to the present invention, in the stopped position, seen in elevation.
  • the figure 5 uses the same embodiment as the figure 1 , in the stop position, all the reference signs remaining identical.
  • the figure 6 uses the same embodiment as the figure 2 , in the free position, all the reference signs remaining identical.
  • the watch movement 301 further comprises a lever rocker 5 arranged to cooperate with the control lever 6 and a winding rod 1 connected to a winding crown 305 schematically represented and operable by the user of the watch, and represented schematically in figure 11 .
  • the movement further includes a pull tab 2, a pull tab rocker, a pull spring 3.1 and a sliding pinion 4.
  • the winding stem 1 cooperates with the control lever 6 by means of the lever rocker 5, the pull tab 2, the pull lever rocker 3, the pull spring 3.1 and the sliding pinion 4.
  • the winding stem 1 thus has a first position, called the stop position, in which it makes it possible to actuate the control lever 6 and to stop the balance shaft 9 by means of the braking member 7 , as shown in figure 5 .
  • the winding stem 1 has a second position, called the free position, in which it leaves free to oscillate the balance shaft 9, leaving the braking member 7 at a distance from the large plate 8.1 from the double plate 8, as shown in figure 6 .
  • the movement also includes a lever rocker bridge 30 allowing the support and pivoting of the lever rocker 5.
  • the figure 7 uses the same embodiment as the figure 1 , in the stop position, all the reference signs remaining identical.
  • the figure 8 uses the same embodiment as the figure 2 , in the free position, all the reference signs remaining identical.
  • the winding stem 1 is in the stop position, and determines a so-called stop position of the pinion 4 along an axis of the winding stem 1.
  • the lever rocker 5 is therefore pivoted at a first angle corresponding to the stop position of the winding stem 1.
  • the lever lever 5 comprises two arms distributed on either side of a pivot 30.1 of the lever lever bridge 30. In this first position, the first arm of the lever lever 5 is engaged with the sliding pinion 4 and the second arm of the lever lever 5 is in contact with a cam portion 6.1 of the control lever 6.
  • the first arm of the lever lever 5 preferably has a length equal to one third of the length of the second arm of the lever lever 5.
  • the control lever 6 further comprises an attachment end 6.2, fixed to a fixed plate integral with the watch case 300 shown diagrammatically in figure 11 , and a movable end arranged to come into contact with the braking member 7.
  • the cam portion 6.1 of the control lever 6 makes it possible to transform the movement of the lever rocker 5 in one plane into a movement in another plane of the control lever 6.
  • a curved portion of the portion of cam 6.1 allows the movable end of the control lever 6 to be pivoted when it comes into contact with the lever lever 5.
  • the cam portion 6.1 is located between the attachment end and the movable end, at a distance at least equal to one third of a movable length of the control lever 6, counted from the attachment end.
  • the winding stem 1 is in the free position, and determines the so-called free position of the sliding pinion 4 along the axis of the winding stem 1.
  • the lever rocker 5 is pivoted by a second angle around its axis of rotation of the pivot 30.1 of the lever rocker bridge 30.
  • the second arm of the lever rocker 5 is positioned at a distance from the cam portion 6.1 of the control lever 6 and therefore the control lever 6 does not come into contact with the braking member 7, leaving free oscillation for the balance wheel 9.1 and the balance shaft 9.
  • the pull tab spring 3.1 allows the pull back of the pull tab 2.
  • the figure 9 shows the watch movement with the watch case according to the present invention, in a free position, that is to say without braking, seen in elevation.
  • the figure 9 resumes the embodiment of the figure 2 , leaving the oscillating system 200 free to oscillate, all the reference signs being identical.
  • the movement includes the hairspring 9.5 allowing the oscillation of the pendulum 9.1 to be maintained.
  • the hairspring 9.5 is fixed at a first end by a piton to the upper cage bridge 10, acting as a piton holder, and is fixed at a second end to the balance shaft 9, for example using a ferrule.
  • the movement is designed to be installed in a case 302 of watch 300.
  • the figure 10 represents the watch movement according to the present invention, using the signs of previous references.
  • the figure 10 illustrates the cooperation of the escapement 21 and the escapement wheel 22 with the double plate 8 and the balance wheel 9.1.
  • the figure 11 schematically represents the watch.
  • the watch 300 includes the watch movement 301 allowing the movement of the hour, minute and second hands, and the watch case 302.
  • the crown 305 allows the user of the watch 300 to actuate the stop device 100 for the oscillating system 200 of movement 301, in particular to allow fine adjustment and positioning of the hands.
  • the watch 300 also includes a strap 303 and a fastening system 304, so as to allow the watch to be worn on the user's wrist.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Braking Arrangements (AREA)
EP19204862.7A 2018-10-24 2019-10-23 Feststellvorrichtung für schwingungssystem Active EP3644134B1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR1859831A FR3087906B1 (fr) 2018-10-24 2018-10-24 Dispositif d'arret de systeme oscillant

Publications (2)

Publication Number Publication Date
EP3644134A1 true EP3644134A1 (de) 2020-04-29
EP3644134B1 EP3644134B1 (de) 2021-09-08

Family

ID=65494369

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19204862.7A Active EP3644134B1 (de) 2018-10-24 2019-10-23 Feststellvorrichtung für schwingungssystem

Country Status (2)

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EP (1) EP3644134B1 (de)
FR (1) FR3087906B1 (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1451647A2 (de) 2001-12-07 2004-09-01 Lange Uhren GmbH Tourbillon
DE202013105033U1 (de) * 2013-11-08 2014-01-07 Grossmann Uhren Gmbh Aufzug für Armbanduhren
EP3136187A1 (de) * 2015-08-31 2017-03-01 Glashütter Uhrenbetrieb GmbH Mechanisches uhrwerk mit einem tourbillon

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1451647A2 (de) 2001-12-07 2004-09-01 Lange Uhren GmbH Tourbillon
DE202013105033U1 (de) * 2013-11-08 2014-01-07 Grossmann Uhren Gmbh Aufzug für Armbanduhren
EP3136187A1 (de) * 2015-08-31 2017-03-01 Glashütter Uhrenbetrieb GmbH Mechanisches uhrwerk mit einem tourbillon

Also Published As

Publication number Publication date
EP3644134B1 (de) 2021-09-08
FR3087906A1 (fr) 2020-05-01
FR3087906B1 (fr) 2020-11-20

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