EP1566708B1 - Aufzugsvorrichtung - Google Patents

Aufzugsvorrichtung Download PDF

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Publication number
EP1566708B1
EP1566708B1 EP20040405781 EP04405781A EP1566708B1 EP 1566708 B1 EP1566708 B1 EP 1566708B1 EP 20040405781 EP20040405781 EP 20040405781 EP 04405781 A EP04405781 A EP 04405781A EP 1566708 B1 EP1566708 B1 EP 1566708B1
Authority
EP
European Patent Office
Prior art keywords
disc
ring
organ
winding
recesses
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.)
Active
Application number
EP20040405781
Other languages
English (en)
French (fr)
Other versions
EP1566708A3 (de
EP1566708A2 (de
Inventor
Daniel Wild
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 EP1566708A2 publication Critical patent/EP1566708A2/de
Publication of EP1566708A3 publication Critical patent/EP1566708A3/de
Application granted granted Critical
Publication of EP1566708B1 publication Critical patent/EP1566708B1/de
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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
    • G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
    • G04B3/06—Keys or the like with means preventing overwinding

Definitions

  • the present invention relates to the field of mechanical watchmaking. It relates, more particularly, a winding device comprising a crown of the type mounted at the end of a winding stem.
  • the rod ensures, in particular, the armature function of the motor spring of a mechanical watch with manual winding. In its middle part, it is kinematically connected to a winding pinion which, via a gear train, drives the mainspring. At its outer end, the rod is fixed, often by screwing, to the winding crown.
  • the U.S. Patent 2,571,879 discloses a mechanism comprising a spring and balls, arranged to produce a disengagement and generate a warning rattling when the carrier raises the spring excessively. This solution allows, admittedly, to limit the arming of the spring, but it does not guarantee, in the long run, satisfactory operating conditions, because of a significant risk of clogging of the mechanism.
  • the document FR 1 230 864 proposes to insert between the crown and the spring, a coupling member with limited torque having a very low friction, housed inside the movement.
  • This friction can be modulated by means of a spring whose tension can be adjusted by means of a nut.
  • Such a solution occupies a volume considerable inside the movement and requires delicate adjustments, which may be out of order.
  • the main object of the present invention is to provide a winding device that is particularly simple and easy to produce and that makes it possible to avoid any over-winding of the mainspring without taking up space inside the movement. Furthermore, the device according to the invention also aims to withstand wear and damage caused by time and conditions of use.
  • the elastic member has an axial deformation when the torque is applied.
  • the connecting means comprise recesses on the faces of the part and the clutch plate facing one another and balls positioned in the recesses.
  • the engagement of the balls in the shallower recesses, disk or part, defines the arming of the elastic member.
  • the connecting means are formed of bosses and recesses, formed on the clutch part and the others on the clutch disc, these bosses being arranged to engage in the hollows.
  • the elastic member consists of a coil spring interposed between the ring and the clutch disc. This solution occupies little space and allows a good control of the limit torque.
  • the elastic member In order to reduce the volume occupied by the elastic member, it consists of a sinus circle inserted between the ring and the clutch disc.
  • the figure 1 shows the typical winding A and disarming curves B of a mainspring, with the number of windings on the abscissa and the pair on the y-axis. If one starts from the point 0, we see that, in a first zone A has the couple growing rapidly, the slope tapering. In this area, the barrel spring begins to wind on its shaft. In the area A b , the torque increases substantially linearly. The barrel spring flexes and coils progressively on the shaft, until the armature reaches a limit value C lim . If the arming continues, the torque then increases again strongly, as can be seen in the area A c , the spring being subjected to traction. If the applied torque exceeds a limit value C r , the spring may break.
  • the torque applied by the mainspring on the wheel of the watch is slightly lower than the armature torque, because of friction losses.
  • the decay of the torque is substantially linear, whereas in the zone B a , it decreases in a quadratic way, to find the point 0.
  • the disarming curve does not have an area equivalent to the zone A c , it is because the arming of the spring is guaranteed by a pawl which has a sufficient back to find the linear zone.
  • the torque must be brought to a value C max as close as possible to C lim, but in all cases, less than C r .
  • the torque C max must be defined with an accuracy of 10 to 20%
  • FIGS. 2a and 2b represent a first variant of a winding device 10 to torque limitation according to the invention, respectively seen in axial section and in plan. It is intended to equip a watch provided with a box provided with a tube 12, visible only on the figure 2a with whom he cooperates. This tube 12 is intended to provide a connection between the inside and outside of the box, in particular to perform the reassembly and time setting operations.
  • the clutch part 20 must bear against the bottom 14a of the ring 14 and be able to rotate freely.
  • the ring 14 and the part 20 are not permanently integral in rotation.
  • the clutch disc 22 is disposed in the ring 14 so that it is integral in rotation, for example by defining an octagonal periphery of the disc 22, of complementary shape to that which the housing 15 presents in its part between litters 14d and 14e. It must, in addition, be able to move axially, so as to allow a disengagement between the part 20 and the disk 22, as will be explained later.
  • the assembly of the device as defined is carried out by placing in the housing 15 the plate 20a of the clutch part 20, its sleeve 20a being turned outward. It will be noted that the edge of the plate 20a is disengaged in its portion adjoining the bottom 14a, so that contact between the part 20 and the ring 14 is only in the central part, to reduce friction .
  • the balls 24 are put in place, one in each of the recesses 20d.
  • the disk 22 is then engaged on the part 20, the central opening 22a surrounding the sleeve 20a.
  • the recesses 22b are arranged so that the balls 24 engage, the disc 22 is thus positioned radially and axially with reference to the part 20, and can roll on it, but without direct contact.
  • the ring 26 is prepared, by driving the ring 32 so that it defines a space in which the seal 30 can take place. After introducing the spring 28 into the groove 26a, the ring thus mounted and driven into the housing 15 of the crown 14, to abut against the scope 14d.
  • the contact between the ring 26 and the wall of the crown 14 must be perfect, so that no liquid can penetrate. To ensure this contact, it is possible to fix these parts to each other by driving and gluing.
  • the seal 30 can be put in place on the ring 14, either before or after the mounting of the ring 26. It can, in addition, be easily replaced during the after-sales service.
  • the rod 18 can then be screwed onto the sleeve 20b.
  • it advantageously comprises two plates parallel to each other and oriented longitudinally, which allow to tighten the sleeve 20b and thus ensure a screwing bottom of the rod 18 in the threaded hole.
  • the device 10 is then mounted in a watch movement, the rod 18 being engaged in the box by the tube 12 and cooperating with a winding pinion which provides the winding of a mainspring, in a conventional manner, with a simple rotation of the ring 14.
  • the tube 12 and the seal 30 are dimensioned so that they are in close contact with each other. the other. In this way, the housing 15 forms a confined space which is open only towards the inside of the box.
  • the rotational movement of the ring gear 14 is transmitted to the rod 18 by the disengaging member 16.
  • the spring 28 is armed (ie compressed) and the balls 24 out of the recesses 20d, which are shallower than the recesses 22b, and roll in the raceway to move to the next recess. In this way, the disk 22 is disengaged from the part 20 and the winding of the mainspring can no longer be done.
  • the torque C max is essentially defined by the characteristics of the spring 28 and by the distance between the bottom of the groove 26a and the bearing surface of the clutch disk 22. However, to ensure this distance, it is necessary that the ring 26 is perfectly positioned with reference to the disk 22, which can be achieved by defining tight tolerances between the bearing surface of the part 20 in the bottom of the cap 14 and the bearing 14d.
  • This torque is also influenced by the friction of the various component parts of the device. This is why special attention must be given to the surface states of the parts in contact with each other. Because the space is confined, it is possible to lubricate the surfaces in relative motion, so as to ensure good working conditions.
  • the user applies a traction force on the crown 14, which arms the spring 28.
  • the ring 26 bears against the disc 22 on the opposite side to that comprising the recesses 22a. .
  • the balls 24 are pressurized and transmit the force to the part 20 which axially drives the rod 18 which tends to exit the box to take a position in which it is possible to perform a time setting. This operation is done by a rotation of the crown 14. It is obvious that, to be able to perform it without problem, the couple to apply to train the gear and the mechanisms of the watch must be less than Cmax.
  • the essential difference lies in the fact that the seal 30 is housed in a groove 12a that includes the tube 12. In this way, the structure of the ring 26 is simplified.
  • the ring 26 has a radially oriented annular groove 26c in which is housed the seal 30 which is here formed of a single piece toric.
  • Variants of Figures 5 and 6 do not have a ball.
  • the clutch part 20 cooperates directly with the clutch disc 22, the latter being provided with spherical bosses 22c engaged in the recesses 20d of the clutch part 20 for the variant of the clutch.
  • figure 5 whereas in the variant of the figure 6 they are bosses 22d with radial orientation and trapezoidal section which cooperate with the recesses 20d.
  • the shape of the latter is, of course, adapted to that of the bosses 22d.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Mechanical Operated Clutches (AREA)
  • Transmission Devices (AREA)
  • Springs (AREA)

Claims (8)

  1. Aufzugvorrichtung mit Drehmomentbegrenzung, die dazu bestimmt ist, eine in einem Gehäuse untergebrachte Motorfeder eines Uhrwerks bis zu einem Grenzwert zu spannen, und die umfasst:
    - ein Rohr (12), das dazu bestimmt ist, mit dem Gehäuse verbunden zu sein und das eine Achse (A-A) definiert,
    - eine Aufzugskrone (14), die die Form einer Haube aufweist mit einem Boden (14a) und einer zylindrischen Wand (14b), wobei die Krone um die Achse (A-A) drehbar ist,
    - ein Auskupplungsorgan (16) und
    - eine Aufzugswelle (18), die kinematisch mit der Aufzugskrone (14) durch das Auskupplungsorgan (16) verbunden ist oder nicht, je nachdem, ob das Drehmoment der Motorfeder kleiner oder größer ist als der Grenzwert, und die dazu bestimmt ist, koaxial in dem Rohr (12) eingepasst zu sein,
    dadurch gekennzeichnet, dass die Vorrichtung aufweist:
    - einen starr und dicht an der Innenseite der zylindrischen Wand (14b) befestigten Ring (26),
    - ein Dichtungsorgan (30) zwischen dem Ring (26) und dem Rohr (12), das einen geschlossenen Raum (15) begrenzt, in dem das Auskupplungsorgan untergebracht ist,
    und dadurch, dass das Auskupplungsorgan (16) aufweist:
    - ein mit der Welle (18) verbundenes Einkupplungsteil (20),
    - eine Einkupplungsscheibe (22),
    - Verbindungsmittel der Scheibe (22) und des Einkupplungsteils (20) und
    - ein elastisches Organ (28, 38, 40), das ausgebildet ist, um die Scheibe (22) und das Teil (20) über die Verbindungsmittel (24) zu verbinden, solange das angelegte Drehmoment kleiner als der Grenzwert ist.
  2. Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, dass das elastische Organ (28, 38, 40) eine axiale Deformation aufweist, wenn das angelegte Drehmoment den Grenzwert überschreitet.
  3. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Verbindungsmittel Höhlungen (20d, 22b) auf den Seiten des Teils (20) und der Scheibe (22) besitzen, die sich einander gegenüber befinden, und Kugeln (24), die in den Höhlungen (20d, 22b) positioniert sind, wobei der Eingriff der Kugeln in die am wenigsten tiefen Höhlungen der Scheibe (22) oder des Teils (20) die Spannung des elastischen Organs (28, 38, 40) bestimmt.
  4. Vorrichtung nach einem der Ansprüche 1 und 2, dadurch gekennzeichnet, dass die Verbindungsmittel von Höckern (22c) und von Höhlungen (20d) gebildet werden, von denen die einen auf dem Einkupplungsteil (20) und die anderen auf der Scheibe (22) eingearbeitet sind, wobei die Höcker (22c) derart ausgebildet sind, dass sie in die Höhlungen (20d) eingreifen.
  5. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das elastische Organ von einer Spiralfeder (26) gebildet wird, die zwischen dem Ring (26) und der Scheibe (22) zwischengestellt ist.
  6. Vorrichtung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass das elastische Organ von einem Sinuskreis (34, 38, 40) gebildet wird, der zwischen dem Ring (26) und der Scheibe (22) zwischengestellt ist.
  7. Vorrichtung nach einem der Ansprüche 1 bis 6, dadurch gekennzeichnet, dass der Ring (26) an der Wand der Haube (14) durch Einpressen-Kleben befestigt ist.
  8. Vorrichtung nach einem der Ansprüche 1 bis 7, dadurch gekennzeichnet, dass das Rohr (12) an seiner Außenseite mit einer Rille (12a) ausgestattet ist, in die die Dichtung (30) montiert ist.
EP20040405781 2004-01-28 2004-12-17 Aufzugsvorrichtung Active EP1566708B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CH1112004 2004-01-28
CH1112004A CH697270B1 (fr) 2004-01-28 2004-01-28 Dispositif de remontoir.

Publications (3)

Publication Number Publication Date
EP1566708A2 EP1566708A2 (de) 2005-08-24
EP1566708A3 EP1566708A3 (de) 2008-03-05
EP1566708B1 true EP1566708B1 (de) 2011-08-31

Family

ID=34706027

Family Applications (1)

Application Number Title Priority Date Filing Date
EP20040405781 Active EP1566708B1 (de) 2004-01-28 2004-12-17 Aufzugsvorrichtung

Country Status (2)

Country Link
EP (1) EP1566708B1 (de)
CH (1) CH697270B1 (de)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2367075B1 (de) * 2010-03-17 2017-07-26 Meco S.A. Aufzugskrone für Uhren
CN102385301A (zh) * 2010-08-30 2012-03-21 深圳市飞亚达科技发展有限公司 一种手表上条过载保护机构及具有该保护机构的手表
CH709363A1 (fr) * 2014-03-19 2015-09-30 Mps Micro Prec Systems Ag Couronne de remontage.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB604034A (en) * 1944-11-27 1948-06-28 Charles Hill Improvements in watch winding device
US2571879A (en) 1946-07-25 1951-10-16 Hil Jon Safety Crown Corp Overload release coupling
US2716875A (en) * 1953-03-20 1955-09-06 Hill Charles Watch winding means
DE945320C (de) * 1953-08-20 1956-07-05 Richard Pfisterer Fa Krone fuer Armband- oder Taschenuhren
US2927420A (en) * 1958-04-21 1960-03-08 Hil Jon Safety Crown Corp Waterproof watch winding means
DE1204043B (de) 1958-07-24 1965-10-28 Heliowatt Werke Elek Zitaets G Grenzkraftkupplung zur UEbertragung kleiner Leistungen in feinmechanischen oder elektro-technischen Geraeten
CH696823A5 (fr) * 2003-09-01 2007-12-14 Patek Philippe Sa Couronne de remontage pour pièce d'horlogerie mécanique.

Also Published As

Publication number Publication date
EP1566708A3 (de) 2008-03-05
EP1566708A2 (de) 2005-08-24
CH697270B1 (fr) 2008-07-31

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