EP3783444B1 - Timepiece mechanism comprising a locking device - Google Patents

Timepiece mechanism comprising a locking device Download PDF

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Publication number
EP3783444B1
EP3783444B1 EP19192436.4A EP19192436A EP3783444B1 EP 3783444 B1 EP3783444 B1 EP 3783444B1 EP 19192436 A EP19192436 A EP 19192436A EP 3783444 B1 EP3783444 B1 EP 3783444B1
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EP
European Patent Office
Prior art keywords
locking
stopping
beak
mobile
fixedly attached
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
EP19192436.4A
Other languages
German (de)
French (fr)
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EP3783444A1 (en
Inventor
Pascal Perron
David Chabloz
Lukas Gisler
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.)
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Publication date
Application filed by Patek Philippe SA Geneve filed Critical Patek Philippe SA Geneve
Priority to EP19192436.4A priority Critical patent/EP3783444B1/en
Publication of EP3783444A1 publication Critical patent/EP3783444A1/en
Application granted granted Critical
Publication of EP3783444B1 publication Critical patent/EP3783444B1/en
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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
    • G04B15/00—Escapements
    • G04B15/10—Escapements with constant impulses for the regulating mechanism
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/22—Compensation of changes in the motive power of the mainspring
    • G04B1/225—Compensation of changes in the motive power of the mainspring with the aid of an interposed power-accumulator (secondary spring) which is always tensioned
    • 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
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed wheel

Definitions

  • the present invention relates to a watch mechanism provided with a gear train and a device for locking said gear train, said locking device comprising a mobile stopper arranged to be able to be driven in rotation by the gear train and formed of a stopper and a pinion, said stopper wheel being arranged to carry a blocking beak, and a blocking member movable between a first stop position in which the blocking member cooperates with the blocking beak to stop the mobile stop in order to immobilize the gear train and a second position in which the blocking member does not cooperate with the mobile stop.
  • Such a mechanism is used, for example, in a watch movement comprising a remontoire or a so-called “constant force” device, that is to say a watch movement comprising between its driving member and its escapement an intermediate spring which is armed periodically by the motor unit and which delivers its energy to the exhaust.
  • Such a watch movement is described in the documents CH707181 and US2009067296 , as well as in the patent EP 3 401 739 of the plaintiff.
  • the watch movement is arranged to operate according to a cycle comprising a first phase during which the locking member blocks the stop wheel set, placed at the end of the gear train, to immobilize said gear train, allowing the intermediate spring to relax, and a second phase triggered by the release of the train by the blocking member during which the intermediate spring is reset and the blocking member is returned to a position in which it can again immobilize the train.
  • the stop wheel performs a 360° rotation before being stopped again by the blocking member.
  • the present invention aims to remedy these drawbacks by proposing a device for locking a mobile in rotation making it possible to stop said mobile in a safe manner without having a violent shock between the locking device and said mobile.
  • the present invention relates to a timepiece mechanism provided with a gear train and a device for locking said gear train, said locking device comprising a mobile stop arranged to be able to be driven in rotation by the gear train and formed of a stop wheel and a pinion, said stop wheel being arranged to carry a blocking lip, and a blocking member movable between a first stop position in which the blocking member cooperates with the blocking to stop the mobile stop in order to immobilize the gear train and a second position in which the blocking member does not cooperate with the mobile stop.
  • the blocking device comprises an elastic member carried by the stop wheel of the stop mobile and arranged to connect the blocking nose to the said stop wheel and to allow, in the event of a shock between the locking member and the locking beak, a damping of said shock comprising at least one elastic part.
  • the elastic member is arranged to allow, during a shock between the blocking member and the blocking beak, a damping of said shock comprising an elastic part but also an energy dissipative part, preferably by friction.
  • the blocking device according to the invention makes it possible to reduce the maximum force of a shock between the blocking device and the mobile in rotation at the moment of blocking of the mobile in rotation and to increase the duration of this shock, so that the problems associated with a violent impact between the locking device and said moving part (namely in particular wear, but also deformation and the rotation holding torque) are eliminated.
  • the present invention also relates to a timepiece, such as a watch or clock, comprising a timepiece mechanism as defined above.
  • the watch mechanism 1 comprises a motor member 2, typically consisting of a barrel, a gear train 3 driven in rotation by the motor member 2 and a device 4 for locking the gear train 3.
  • the gear train 3 comprises, in the example shown, a center wheel set 3a meshing with the motor member 2, an average wheel set 3b meshing with the center wheel set 3a, a second wheel set 3c meshing with the average wheel set 3b, a first intermediate mobile 3d meshing with the second mobile 3c, a second intermediate mobile 3e meshing with the first intermediate mobile 3d.
  • Each of the mobiles 3a to 3e is formed of a toothed wheel and a pinion which are coaxial and integral.
  • the blocking device 4 comprises a stop wheel set 6 arranged to be driven in rotation by the gear train 3, when the wheel train 3 is itself driven by the motor member 2. More specifically, the drive of the stop wheel set 6 is made by meshing with the second intermediate wheel set 3rd of said gear train 3.
  • the stop wheel set 6 is formed of a pinion 6a, arranged to mesh with the toothed wheel of the second intermediate wheel set 3e, and of a stop wheel (Not toothed) 6b coaxial with the pinion 6a, and comprising in particular a body 6c coaxial with and integral with said pinion 6a.
  • the stop wheel 6b is arranged to carry a blocking beak 8, represented on the figures 1 and 2 in a simplified manner and which will be described more specifically below.
  • the blocking device 4 also comprises a blocking member 10 movable between a first stop position in which the blocking member 10 cooperates with the blocking beak 8 of the mobile stop 6 to stop said mobile stop 6 in order to immobilize the gear train 3 and a second position in which the blocking member 10 has moved away and can therefore no longer cooperate with the mobile stop 6, allowing the release of said mobile stop 6 so that the gear train 3 is free to rotate under the action of the motor member 2.
  • the locking member 10 is presented in a way advantageous in the form of a lever carrying a beak or nose 10a arranged to cooperate with the locking beak 8 of the mobile stop 6.
  • the mechanism 1 also comprises a control member 12, such as a rocker, arranged to control the positioning of the locking member 10 in its first stop position as shown in the figure 1 or in its second position, when the locking member 10 is disengaged from the mobile stop 6, as shown in the figure 2 .
  • a control member 12 such as a rocker
  • Mechanism 1 can be arranged to operate with a constant-force device or a remontoire (not shown). Such a mechanism 1 is described in the application EP 3 401 739 of the applicant to whom reference may be made for the detailed description of the elements relating to the constant-force device and its operation.
  • the watch mechanism according to the invention can be used in a watch or a clock, in particular a table clock.
  • Mechanism 1 can also be used in any other timepiece mechanism comprising a stop system, and more particularly an instantaneous stop system generating violent shocks between the parts when the mechanism is blocked.
  • the mechanism could also be used for example in a striking mechanism, or in any watch mechanism comprising a motor train able to operate in ON/OFF mode, such as a calendar, a calendar, a perpetual calendar.
  • the blocking device 4 comprises an elastic member 14 carried by the stop wheel 6b of the stop wheel set 6 and arranged to mechanically connect the blocking beak 8 to the said stop wheel 6b and to allow , during a shock between the blocking member 10 and the blocking beak 8, a damping said shock comprising at least one elastic part ensured by the compression of the elastic member 14.
  • the elastic member 14 is carried by the body 6c of the wheel 6b of the mobile stop 6 and has for this purpose a first end which is integral with said body 6c and a second end which is integral, directly or indirectly, of the blocking beak 8, as will be described in more detail below.
  • the arrangement of the locking device 4 according to the invention allows solely elastic damping of shocks between the locking member 10 and the locking beak 8.
  • the stop wheel 6b is formed solely by the body 6c integral with the pinion 6a, itself integral with its shaft 16 pivotally mounted on the frame of the mechanism.
  • the elastic member 14 comprises a first end 14a which is integral with said body 6c and a second end 14b, free, integral with the locking spout 8.
  • the elastic member 14 and the locking spout 8 are formed integrally with the body 6c.
  • the body 6c of the stop wheel 6b comprises at least one cutout 18 arranged to form, in the remaining body 6c, the elastic member 14 as well as the blocking beak 8, made in one piece, the second end 14b of the elastic member 14 being arranged to form the locking beak 8.
  • the body 6c may comprise a single cutout 18 made close to the circular peripheral edge of the body 6c so as to form an elastic member 14 and a locking beak 8 outside, at the periphery of said body 6c.
  • the remaining body 6c then has an ovoid shape, coaxial with the pinion 6a.
  • the body 6c of circular shape may comprise two cutouts 18 made in the inner surface of the body 6c, substantially concentric, so as to form a member essentially internal elastic 14, only its second end 14b protruding from the body 6c to form the locking beak 8 arranged to be able to cooperate with the nose 10a of the locking member 10.
  • the cutout(s) 18 is (are) preferably of substantially circular or at the very least rounded shape, in order to release a thin, substantially curved tongue of material, and of sufficient length to present the desired elastic functions and constitute the elastic member 14.
  • the second end of the elastic member 14b is widened to form the locking beak 8.
  • the body 6c forming the stop wheel 6b is made for example of a metal alloy, such as steel, CuBe, German silver, brass, based on Ni, NiP, Nivaflex ® , Phynox ® , etc., in metallic glass or silicon, so that the elastic member can have the required elastic properties.
  • a metal alloy such as steel, CuBe, German silver, brass, based on Ni, NiP, Nivaflex ® , Phynox ® , etc., in metallic glass or silicon, so that the elastic member can have the required elastic properties.
  • the elastic member 14 and the locking spout 8 are attached to the body 6c.
  • the elastic member 14 is in the form of a spring arranged on the body 6c of the stop wheel 6b and of which the first end 14a is firmly fixed on the said body 6c and the second end 14b is free and is attached to the blocking spout 8.
  • the second free end 14b of the elastic member 14 directly carries the locking lug 8 which can be integral with said second end 14b or attached, said locking lug 8 being arranged to cooperate with the nose 10a of the locking member 10 .
  • the arrangement of the blocking device 4 according to the invention and of its elastic member 14 allows, during a shock between the blocking member 10 and the blocking beak 8, to have a damping of said shock comprising not only an elastic part as described above but also an energy dissipating part, advantageously obtained by friction.
  • the stop wheel 6b is formed solely by the body 6c secured to the pinion 6a.
  • the elastic member 14 is in the form of a spring disposed on the body 6c of the stop wheel 6b and whose first end 14a is fixed integrally on said body 6c and the second end 14b is free and is integral with the spout blocking 8.
  • the body 6c carries a pin 20 and the second free end 14b of the elastic member 14 comprises an intermediate oblong housing 22 itself carrying the locking spout 8 which can be integral with said housing 20 or attached.
  • the housing 22 can be formed for example by a loop formed at the second end 14b of the elastic member 14.
  • the pin 20 can circulate in said housing 22 allowing guidance of the locking lug 8 when it is moved under the effect of a shock with the nose 10a of the blocking member 10.
  • the spring 14 makes it possible to ensure the elastic part of the damping during a shock between the blocking member 10 and the blocking beak 8, the friction of the pin 20 in the housing 22 constituting its dissipative part.
  • the stop wheel 6b comprises a body 6c integral with the pinion 6a and its shaft 16, as well as a circular plate 24, coaxial and mounted free in rotation with respect to said body 6c around the shaft 16.
  • the plate 24 is integral with the locking lip 8 arranged at its outer periphery in order to be able to cooperate with the nose 10a of the locking member 10.
  • the locking lip 8 is preferably one piece with the board 24 but it can also be attached.
  • the elastic member 14 is arranged to bind the body 6c and the plate 24 integrally in rotation when the locking member 10 is not in its first stop position, the gear train then being free to turn and drive the mobile stop 6, by driving together the body 6c and the board 24, and to allow relative movement between the body 6c and the board 24 during an impact between the blocking member 10 and the blocking beak 8 when the blocking member 10 is passed through its first stop position, so the shock absorption comprises an elastic part as well as a part which dissipates energy by friction.
  • the board 24 and the body 6c are configured to respectively have surfaces in contact with each other, arranged to generate friction during the relative movement between the body 6c and the board 24 following the impact between the blocking member 10 and the locking beak 8.
  • the board 24 and the body 6c are arranged to have a deliberately large pivoting diameter in order to increase friction and dissipate a maximum of energy during an impact. between the blocking member 10 and the blocking spout 8.
  • the elastic member 14 is in the form of a spring arranged in a circular manner on the body 6c of the stop wheel 6b, coaxially with the shaft 16.
  • the elastic member 14 which comprises a first end 14a which is solidly fixed to the body 6c of the stop wheel 6b, and a second end 14b which is solidly fixed to the board 24 by means of a fixing element 26, such as a nail mounted through the second end of the elastic member 14 and fixed in an orifice 27 provided on the board 24.
  • the fixing element 26 is positioned in the board 24 in the immediate vicinity and radially of the locking spout 8.
  • the body 6c comprises an oblong slot 28 in which said fixing element 26 can circulate during a relative movement between the body 6c and the board 24 during an impact between the locking member 10 and the beak of blockage 8.
  • the oblong slot 28 is circular in shape concentric with the body 6c and the board 24.
  • the elastic member is pre-armed and the length of the slot 28 is chosen so that its front end 28a (cf. . figure 12 ) constitutes a stop for the fixing element 26 in order to guarantee the correct positioning of the board 24 and therefore of the locking lug 8 when the body 6c and the board 24 are integrally connected in rotation.
  • the length of the light 28 is also chosen so that its rear end 28b (cf. face 12 ) constitutes a stop for the fixing element 26 in order to guarantee that the spring does not plastify when its maximum travel is reached.
  • the body 6c of the stop wheel 6b has on its peripheral periphery at least one radial elastic arm 30 (for example three as shown) arranged to be in contact with the board 24 so as to generate additional friction.
  • Each elastic arm 30 ends in a contact element 30a arranged to be in contact with a corresponding surface provided on the board 24.
  • the torque resulting from the action of the elastic member 14 must be greater than the torque resulting from the friction of the elastic arms 30 on the board 24 in order to guarantee the correct positioning of said board 24 and therefore of the locking lug 8 when the body 6c and the board 24 are integrally connected in rotation.
  • the elastic member 14, when attached, as in the variants of the figures 6 to 12 is for example made of steel, NiP, or silicon, the body 6c of the stop wheel being for example made of CuBe and the plate 24 made of steel.
  • the operation of the watch mechanism is as follows: with reference to the figure 11 , when the blocking device 4 is in its second position, the blocking member 10 and its nose 10a are moved away from the mobile stop 6 so that the gear train 3 is released. Under the action of the motor member 2, the various wheel sets 3a to 3e of the gear train 3 are driven in rotation, the wheel set 3e driving the pinion 6a of the stop wheel set 6 in rotation in the clockwise direction.
  • the rotation of the pinion 6a causes the integral rotation of all the elements of the stop wheel 6b in the clockwise direction, the body 6c being integral with the pinion 6a and carrying the elastic member 14, and the board, in the variants where it is present, being integrally connected in rotation to the body 6c by the elastic member 14.
  • the damping of said shock comprises an elastic part, ensured by the bending of the spring, as well a part that dissipates energy by friction of the board 24 on the body 6c, said board 24 having separated from the body 6c and moving relative to the said body 6c, the second end 14b of the elastic member being able to move in the braid 28.
  • the shock absorption between the locking beak 8 and the nose 10a of the locking member 10 is only of the elastic type.
  • the mobile stop 6 is immobilized, which stops the cog 3 and the motor member 2, until the locking member 10 moves back into its second position and releases stop wheel set 6.
  • the blocking device of the invention by using an elastic member integrated (monolithic or embedded) in the mobile stop and not in the blocking member, allows said blocking member to remain rigid, which guarantees the reliability of the blocking in rotation of the cog.
  • the blocking device of the invention makes it possible to reduce the maximum force between the blocking nose of the mobile stop and the nose of the blocking member and to increase the duration of the shock.
  • the impact energy is no longer dissipated mainly between the blocking member and the blocking beak, which caused rapid and significant wear of said blocking beak, but the majority of the energy is dissipated by friction between the board and the body of the stop wheel, with a first elastic damping part at the moment of impact.
  • the present invention makes it possible to eliminate all the problems associated with violent shocks, such as premature wear of the locking beak, but also deformation and the rotational holding torque.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Lock And Its Accessories (AREA)
  • Electromechanical Clocks (AREA)

Description

La présente invention concerne un mécanisme horloger pourvu d'un rouage et d'un dispositif de blocage dudit rouage, ledit dispositif de blocage comprenant un mobile d'arrêt agencé pour pouvoir être entrainé en rotation par le rouage et formé d'une roue d'arrêt et d'un pignon, ladite roue d'arrêt étant agencée pour porter un bec de blocage, et un organe de blocage mobile entre une première position d'arrêt dans laquelle l'organe de blocage coopère avec le bec de blocage pour arrêter le mobile d'arrêt afin d'immobiliser le rouage et une seconde position dans laquelle l'organe de blocage ne coopère pas avec le mobile d'arrêt.The present invention relates to a watch mechanism provided with a gear train and a device for locking said gear train, said locking device comprising a mobile stopper arranged to be able to be driven in rotation by the gear train and formed of a stopper and a pinion, said stopper wheel being arranged to carry a blocking beak, and a blocking member movable between a first stop position in which the blocking member cooperates with the blocking beak to stop the mobile stop in order to immobilize the gear train and a second position in which the blocking member does not cooperate with the mobile stop.

Un tel mécanisme est utilisé par exemple dans un mouvement horloger comprenant un remontoir d'égalité ou un dispositif dit à « force constante », c'est-à-dire un mouvement horloger comprenant entre son organe moteur et son échappement un ressort intermédiaire qui est armé périodiquement par l'organe moteur et qui délivre son énergie à l'échappement.Such a mechanism is used, for example, in a watch movement comprising a remontoire or a so-called "constant force" device, that is to say a watch movement comprising between its driving member and its escapement an intermediate spring which is armed periodically by the motor unit and which delivers its energy to the exhaust.

Un tel mouvement horloger est décrit dans les documents CH707181 et US2009067296 , ainsi que dans le brevet EP 3 401 739 de la demanderesse. Le mouvement horloger est agencé pour fonctionner selon un cycle comprenant une première phase pendant laquelle l'organe de blocage bloque le mobile d'arrêt, placé au bout du rouage, pour immobiliser ledit rouage, permettant au ressort intermédiaire de se détendre, et une seconde phase déclenchée par la libération du rouage par l'organe de blocage pendant laquelle le ressort intermédiaire est réarmé et l'organe de blocage est ramené dans une position dans laquelle il pourra de nouveau immobiliser le rouage. A chaque cycle, lorsque l'organe de blocage s'est escamoté pour libérer le rouage, le mobile d'arrêt effectue une rotation de 360° avant d'être à nouveau arrêté par l'organe de blocage. Lorsque l'organe de blocage et le mobile d'arrêt entrent en contact l'un de l'autre, il se produit un choc qui est d'autant plus fort que le mobile d'arrêt se déplace avec une certaine vitesse, de sorte que les forces en jeu sont très importantes pour une durée du choc très courte (inférieure à 1 ms). Ce choc brusque et très violent, répété à chaque cycle, va entrainer une usure importante, notamment au niveau du bec de blocage du mobile d'arrêt. Cette usure se traduit par la production de copeaux de matière qui salissent le mouvement. A terme, une usure importante risque de faire perdre au mobile d'arrêt sa fonction d'arrêtage.Such a watch movement is described in the documents CH707181 and US2009067296 , as well as in the patent EP 3 401 739 of the plaintiff. The watch movement is arranged to operate according to a cycle comprising a first phase during which the locking member blocks the stop wheel set, placed at the end of the gear train, to immobilize said gear train, allowing the intermediate spring to relax, and a second phase triggered by the release of the train by the blocking member during which the intermediate spring is reset and the blocking member is returned to a position in which it can again immobilize the train. At each cycle, when the blocking member has retracted to release the gear train, the stop wheel performs a 360° rotation before being stopped again by the blocking member. When the blocking member and the mobile stopper come into contact with each other, a shock is produced which is all the stronger as the mobile stopper moves with a certain speed, so that the forces involved are very high for a very short shock duration (less than 1 ms). This sudden and very violent shock, repeated with each cycle, will cause significant wear, in particular at the level of the blocking beak of the stop mobile. This wear results in the production of shavings of material that dirty the movement. Eventually, significant wear risks causing the mobile stopper to lose its stopping function.

La présente invention vise à remédier à ces inconvénients en proposant un dispositif de blocage d'un mobile en rotation permettant d'arrêter ledit mobile de manière sûre sans avoir de choc violent entre le dispositif de blocage et ledit mobile.The present invention aims to remedy these drawbacks by proposing a device for locking a mobile in rotation making it possible to stop said mobile in a safe manner without having a violent shock between the locking device and said mobile.

A cet effet, la présente invention concerne un mécanisme horloger pourvu d'un rouage et d'un dispositif de blocage dudit rouage, ledit dispositif de blocage comprenant un mobile d'arrêt agencé pour pouvoir être entrainé en rotation par le rouage et formé d'une roue d'arrêt et d'un pignon, ladite roue d'arrêt étant agencée pour porter un bec de blocage, et un organe de blocage mobile entre une première position d'arrêt dans laquelle l'organe de blocage coopère avec le bec de blocage pour arrêter le mobile d'arrêt afin d'immobiliser le rouage et une seconde position dans laquelle l'organe de blocage ne coopère pas avec le mobile d'arrêt.To this end, the present invention relates to a timepiece mechanism provided with a gear train and a device for locking said gear train, said locking device comprising a mobile stop arranged to be able to be driven in rotation by the gear train and formed of a stop wheel and a pinion, said stop wheel being arranged to carry a blocking lip, and a blocking member movable between a first stop position in which the blocking member cooperates with the blocking to stop the mobile stop in order to immobilize the gear train and a second position in which the blocking member does not cooperate with the mobile stop.

Selon l'invention, le dispositif de blocage comprend un organe élastique porté par la roue d'arrêt du mobile d'arrêt et agencé pour relier le bec de blocage à ladite roue d'arrêt et pour permettre, lors d'un choc entre l'organe de blocage et le bec de blocage, un amortissement dudit choc comprenant au moins une partie élastique.According to the invention, the blocking device comprises an elastic member carried by the stop wheel of the stop mobile and arranged to connect the blocking nose to the said stop wheel and to allow, in the event of a shock between the locking member and the locking beak, a damping of said shock comprising at least one elastic part.

D'une manière particulièrement avantageuse, l'organe élastique est agencé pour permettre, lors d'un choc entre l'organe de blocage et le bec de blocage, un amortissement dudit choc comprenant une partie élastique mais également une partie dissipative d'énergie, de préférence par frottement.In a particularly advantageous manner, the elastic member is arranged to allow, during a shock between the blocking member and the blocking beak, a damping of said shock comprising an elastic part but also an energy dissipative part, preferably by friction.

Ainsi, le dispositif de blocage selon l'invention permet de réduire la force maximale d'un choc entre le dispositif de blocage et le mobile en rotation au moment du blocage du mobile en rotation et d'augmenter la durée de ce choc, de sorte que les problèmes liés à un choc violent entre le dispositif de blocage et ledit mobile (à savoir notamment l'usure, mais aussi la déformation et le couple de tenue en rotation) sont supprimés.Thus, the blocking device according to the invention makes it possible to reduce the maximum force of a shock between the blocking device and the mobile in rotation at the moment of blocking of the mobile in rotation and to increase the duration of this shock, so that the problems associated with a violent impact between the locking device and said moving part (namely in particular wear, but also deformation and the rotation holding torque) are eliminated.

La présente invention concerne également une pièce d'horlogerie, telle que montre ou pendule, comprenant un mécanisme horloger tel que défini ci-dessus.The present invention also relates to a timepiece, such as a watch or clock, comprising a timepiece mechanism as defined above.

D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante de plusieurs modes de réalisation de l'invention, donnés à titre d'exemples non limitatifs, et faite en référence aux dessins annexés dans lesquels :

  • la figure 1 est une vue de dessus d'un mécanisme horloger selon l'invention, le dispositif de blocage étant dans sa première position d'arrêt;
  • la figure 2 est une vue de dessus du mécanisme horloger selon l'invention, le dispositif de blocage étant dans sa seconde position, laissant le rouage libre de tourner;
  • la figure 3 est une vue isométrique d'une première variante d'un premier mode de réalisation d'un mobile d'arrêt selon l'invention ;
  • la figure 4 est une vue de dessus du mobile d'arrêt de la figure 3 ;
  • les figures 5 et 6 sont des vue de dessus schématisées d'autres variantes du premier mode de réalisation du dispositif de blocage selon l'invention ;
  • la figure 7 est une vue de dessus schématisée d'un mobile d'arrêt selon une première variante d'un deuxième mode de réalisation du dispositif de blocage selon l'invention ;
  • la figure 8 est une vue isométrique d'un mobile d'arrêt selon une deuxième variante du deuxième mode de réalisation du dispositif de blocage selon l'invention ;
  • la figure 9 est une vue de dessous du mobile d'arrêt de la figure 8;
  • la figure 10 est une vue isométrique du mobile d'arrêt selon une troisième variante du deuxième mode de réalisation du dispositif de blocage selon l'invention ;
  • la figure 11 est une vue isométrique de la deuxième variante du deuxième mode de réalisation du dispositif de blocage selon l'invention, le dispositif de blocage étant dans sa seconde position, dans laquelle l'organe élastique est représenté partiellement ; et
  • la figure 12 est une vue isométrique de la deuxième variante du deuxième mode de réalisation du dispositif de blocage selon l'invention, le dispositif de blocage étant dans sa première position d'arrêt, l'organe élastique étant partiellement représenté.
Other characteristics and advantages of the present invention will appear on reading the following detailed description of several embodiments of the invention, given by way of non-limiting examples, and made with reference to the appended drawings in which:
  • the figure 1 is a top view of a timepiece mechanism according to the invention, the locking device being in its first stop position;
  • the figure 2 is a top view of the watch mechanism according to the invention, the locking device being in its second position, leaving the gear train free to turn;
  • the picture 3 is an isometric view of a first variant of a first embodiment of a mobile stop according to the invention;
  • the figure 4 is a top view of the stop mobile of the picture 3 ;
  • the figures 5 and 6 are schematic top views of other variants of the first embodiment of the locking device according to the invention;
  • the figure 7 is a schematic top view of a mobile stopper according to a first variant of a second embodiment of the locking device according to the invention;
  • the figure 8 is an isometric view of a mobile stopper according to a second variant of the second embodiment of the locking device according to the invention;
  • the figure 9 is a bottom view of the stop mobile of the figure 8 ;
  • the figure 10 is an isometric view of the mobile stopper according to a third variant of the second embodiment of the locking device according to the invention;
  • the figure 11 is an isometric view of the second variant of the second embodiment of the locking device according to the invention, the device blocking being in its second position, in which the elastic member is partially represented; and
  • the figure 12 is an isometric view of the second variant of the second embodiment of the locking device according to the invention, the locking device being in its first stop position, the elastic member being partially represented.

En référence aux figures 1 et 2, le mécanisme horloger 1 selon la présente invention comprend un organe moteur 2, typiquement constitué par un barillet, un rouage 3 entrainé en rotation par l'organe moteur 2 et un dispositif de blocage 4 du rouage 3.With reference to figures 1 and 2 , the watch mechanism 1 according to the present invention comprises a motor member 2, typically consisting of a barrel, a gear train 3 driven in rotation by the motor member 2 and a device 4 for locking the gear train 3.

Le rouage 3 comprend, dans l'exemple illustré, un mobile de centre 3a engrenant avec l'organe moteur 2, un mobile de moyenne 3b engrenant avec le mobile de centre 3a, un mobile de seconde 3c engrenant avec le mobile de moyenne 3b, un premier mobile intermédiaire 3d engrenant avec le mobile de seconde 3c, un second mobile intermédiaire 3e engrenant avec le premier mobile intermédiaire 3d. Chacun des mobiles 3a à 3e est formé d'une roue dentée et d'un pignon coaxiaux et solidaires.The gear train 3 comprises, in the example shown, a center wheel set 3a meshing with the motor member 2, an average wheel set 3b meshing with the center wheel set 3a, a second wheel set 3c meshing with the average wheel set 3b, a first intermediate mobile 3d meshing with the second mobile 3c, a second intermediate mobile 3e meshing with the first intermediate mobile 3d. Each of the mobiles 3a to 3e is formed of a toothed wheel and a pinion which are coaxial and integral.

Le dispositif de blocage 4 comprend un mobile d'arrêt 6 agencé pour être entrainé en rotation par le rouage 3, lorsque le rouage 3 est lui-même entrainé par l'organe moteur 2. Plus spécifiquement, l'entrainement du mobile d'arrêt 6 se fait par engrènement avec le second mobile intermédiaire 3e dudit rouage 3. Le mobile d'arrêt 6 est formé d'un pignon 6a, agencé pour engrener avec la roue dentée du second mobile intermédiaire 3e, et d'une roue d'arrêt (non dentée) 6b coaxiale au pignon 6a, et comprenant notamment un corps 6c coaxial et solidaire audit pignon 6a. La roue d'arrêt 6b est agencée pour porter un bec de blocage 8, représenté sur les figures 1 et 2 de manière simplifiée et qui sera décrit plus spécifiquement ci-après.The blocking device 4 comprises a stop wheel set 6 arranged to be driven in rotation by the gear train 3, when the wheel train 3 is itself driven by the motor member 2. More specifically, the drive of the stop wheel set 6 is made by meshing with the second intermediate wheel set 3rd of said gear train 3. The stop wheel set 6 is formed of a pinion 6a, arranged to mesh with the toothed wheel of the second intermediate wheel set 3e, and of a stop wheel (Not toothed) 6b coaxial with the pinion 6a, and comprising in particular a body 6c coaxial with and integral with said pinion 6a. The stop wheel 6b is arranged to carry a blocking beak 8, represented on the figures 1 and 2 in a simplified manner and which will be described more specifically below.

Le dispositif de blocage 4 comprend également un organe de blocage 10 mobile entre une première position d'arrêt dans laquelle l'organe de blocage 10 coopère avec le bec de blocage 8 du mobile d'arrêt 6 pour arrêter ledit mobile d'arrêt 6 afin d'immobiliser le rouage 3 et une seconde position dans laquelle l'organe de blocage 10 s'est éloigné et ne peut donc plus coopérer avec le mobile d'arrêt 6, permettant la libération dudit mobile d'arrêt 6 de sorte que le rouage 3 est libre de tourner sous l'action de l'organe moteur 2. L'organe de blocage 10 se présente d'une manière avantageuse sous la forme d'un levier portant un bec ou nez 10a agencé pour coopérer avec le bec de blocage 8 du mobile d'arrêt 6.The blocking device 4 also comprises a blocking member 10 movable between a first stop position in which the blocking member 10 cooperates with the blocking beak 8 of the mobile stop 6 to stop said mobile stop 6 in order to immobilize the gear train 3 and a second position in which the blocking member 10 has moved away and can therefore no longer cooperate with the mobile stop 6, allowing the release of said mobile stop 6 so that the gear train 3 is free to rotate under the action of the motor member 2. The locking member 10 is presented in a way advantageous in the form of a lever carrying a beak or nose 10a arranged to cooperate with the locking beak 8 of the mobile stop 6.

Le mécanisme 1 comprend également un organe de commande 12, tel qu'une bascule, agencé pour commander le positionnement de l'organe de blocage 10 dans sa première position d'arrêt comme représenté sur la figure 1 ou dans sa seconde position, lorsque l'organe de blocage 10 est dégagé du mobile d'arrêt 6, comme représenté sur la figure 2.The mechanism 1 also comprises a control member 12, such as a rocker, arranged to control the positioning of the locking member 10 in its first stop position as shown in the figure 1 or in its second position, when the locking member 10 is disengaged from the mobile stop 6, as shown in the figure 2 .

Le mécanisme 1 peut être agencé pour fonctionner avec un dispositif à force constante ou un remontoir d'égalité (non représenté). Un tel mécanisme 1 est décrit dans la demande EP 3 401 739 de la demanderesse à laquelle on pourra se rapporter pour la description détaillée des éléments relatifs au dispositif à force constante et à son fonctionnement. Le mécanisme horloger selon l'invention peut être utilisé dans une montre ou une pendule, en particulier une pendule de table. Le mécanisme 1 peut également être utilisé dans tout autre mécanisme horloger comprenant un système d'arrêtage, et plus particulièrement un système d'arrêtage instantané générant des chocs violents entre les pièces lors du blocage du mécanisme. Ainsi, le mécanisme pourrait être également utilisé par exemple dans un mécanisme de sonnerie, ou dans tout mécanisme horloger comprenant un rouage moteur apte à fonctionner en mode ON/OFF, tel qu'un calendrier, un quantième, un quantième perpétuel.Mechanism 1 can be arranged to operate with a constant-force device or a remontoire (not shown). Such a mechanism 1 is described in the application EP 3 401 739 of the applicant to whom reference may be made for the detailed description of the elements relating to the constant-force device and its operation. The watch mechanism according to the invention can be used in a watch or a clock, in particular a table clock. Mechanism 1 can also be used in any other timepiece mechanism comprising a stop system, and more particularly an instantaneous stop system generating violent shocks between the parts when the mechanism is blocked. Thus, the mechanism could also be used for example in a striking mechanism, or in any watch mechanism comprising a motor train able to operate in ON/OFF mode, such as a calendar, a calendar, a perpetual calendar.

Conformément à l'invention, le dispositif de blocage 4 comprend un organe élastique 14 porté par la roue d'arrêt 6b du mobile d'arrêt 6 et agencé pour relier mécaniquement le bec de blocage 8 à ladite roue d'arrêt 6b et pour permettre, lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8, un amortissement dudit choc comprenant au moins une partie élastique assurée par la compression de l'organe élastique 14.In accordance with the invention, the blocking device 4 comprises an elastic member 14 carried by the stop wheel 6b of the stop wheel set 6 and arranged to mechanically connect the blocking beak 8 to the said stop wheel 6b and to allow , during a shock between the blocking member 10 and the blocking beak 8, a damping said shock comprising at least one elastic part ensured by the compression of the elastic member 14.

Plus particulièrement, l'organe élastique 14 est porté par le corps 6c de la roue 6b du mobile d'arrêt 6 et présente à cet effet une première extrémité qui est solidaire dudit corps 6c et une seconde extrémité qui est solidaire, directement ou indirectement, du bec de blocage 8, comme cela sera décrit plus en détails ci-après.More particularly, the elastic member 14 is carried by the body 6c of the wheel 6b of the mobile stop 6 and has for this purpose a first end which is integral with said body 6c and a second end which is integral, directly or indirectly, of the blocking beak 8, as will be described in more detail below.

Selon un premier mode de réalisation de l'invention, l'agencement du dispositif de blocage 4 selon l'invention permet un amortissement uniquement élastique des chocs entre l'organe de blocage 10 et le bec de blocage 8.According to a first embodiment of the invention, the arrangement of the locking device 4 according to the invention allows solely elastic damping of shocks between the locking member 10 and the locking beak 8.

Selon ce premier mode de réalisation, en référence aux figures 3 à 6, la roue d'arrêt 6b est formée uniquement par le corps 6c solidaire du pignon 6a, lui-même solidaire de son arbre 16 monté pivotant sur le bâti du mécanisme. L'organe élastique 14 comprend une première extrémité 14a qui est solidaire dudit corps 6c et une seconde extrémité 14b, libre, solidaire du bec de blocage 8.According to this first embodiment, with reference to the figures 3 to 6 , the stop wheel 6b is formed solely by the body 6c integral with the pinion 6a, itself integral with its shaft 16 pivotally mounted on the frame of the mechanism. The elastic member 14 comprises a first end 14a which is integral with said body 6c and a second end 14b, free, integral with the locking spout 8.

Selon une première variante de ce premier mode de réalisation, et en référence plus spécifiquement aux figures 3 à 5, l'organe élastique 14 et le bec de blocage 8 sont formés de manière monobloc avec le corps 6c.According to a first variant of this first embodiment, and with more specific reference to the figures 3 to 5 , the elastic member 14 and the locking spout 8 are formed integrally with the body 6c.

A cet effet, le corps 6c de la roue d'arrêt 6b comprend au moins une découpe 18 agencée pour former, dans le corps 6c restant, l'organe élastique 14 ainsi que le bec de blocage 8, venus de matière, la seconde extrémité 14b de l'organe élastique 14 étant agencée pour former le bec de blocage 8.To this end, the body 6c of the stop wheel 6b comprises at least one cutout 18 arranged to form, in the remaining body 6c, the elastic member 14 as well as the blocking beak 8, made in one piece, the second end 14b of the elastic member 14 being arranged to form the locking beak 8.

Comme le montrent les figures 3 et 4, le corps 6c peut comprendre une seule découpe 18 réalisée à proximité du bord périphérique circulaire du corps 6c de manière à former un organe élastique 14 et un bec de blocage 8 extérieurs, à la périphérie dudit corps 6c. Le corps 6c restant présente alors une forme ovoïde, coaxiale au pignon 6a.As shown by the figures 3 and 4 , the body 6c may comprise a single cutout 18 made close to the circular peripheral edge of the body 6c so as to form an elastic member 14 and a locking beak 8 outside, at the periphery of said body 6c. The remaining body 6c then has an ovoid shape, coaxial with the pinion 6a.

Comme le montre la figure 5 d'une manière schématisée, le corps 6c de forme circulaire peut comprendre deux découpes 18 réalisées dans la surface intérieure du corps 6c, sensiblement concentriques, de manière à former un organe élastique 14 essentiellement intérieur, seule sa seconde extrémité 14b dépassant du corps 6c pour former le bec de blocage 8 agencé pour pouvoir coopérer avec le nez 10a de l'organe de blocage 10.As shown in figure 5 schematically, the body 6c of circular shape may comprise two cutouts 18 made in the inner surface of the body 6c, substantially concentric, so as to form a member essentially internal elastic 14, only its second end 14b protruding from the body 6c to form the locking beak 8 arranged to be able to cooperate with the nose 10a of the locking member 10.

La ou les découpe(s) 18 est (sont) de préférence de forme sensiblement circulaire ou à tout le moins arrondie, afin de dégager une langue de matière fine, sensiblement incurvée, et de longueur suffisante pour présenter les fonctions élastiques recherchées et constituer l'organe élastique 14. La seconde extrémité de l'organe élastique 14b est élargie pour former le bec de blocage 8.The cutout(s) 18 is (are) preferably of substantially circular or at the very least rounded shape, in order to release a thin, substantially curved tongue of material, and of sufficient length to present the desired elastic functions and constitute the elastic member 14. The second end of the elastic member 14b is widened to form the locking beak 8.

De préférence, le corps 6c formant la roue d'arrêt 6b est réalisé par exemple en alliage métallique, tel que acier, CuBe, Maillechort, laiton, à base de Ni, NiP, Nivaflex®, Phynox®, etc., en verre métallique ou en silicium, afin que l'organe élastique puisse présenter les propriétés élastiques requises.Preferably, the body 6c forming the stop wheel 6b is made for example of a metal alloy, such as steel, CuBe, German silver, brass, based on Ni, NiP, Nivaflex ® , Phynox ® , etc., in metallic glass or silicon, so that the elastic member can have the required elastic properties.

Selon une deuxième variante de ce premier mode de réalisation, et en référence plus spécifiquement à la figure 6, l'organe élastique 14 et le bec de blocage 8 sont rapportés sur le corps 6c.According to a second variant of this first embodiment, and with more specific reference to the figure 6 , the elastic member 14 and the locking spout 8 are attached to the body 6c.

A cet effet, l'organe élastique 14 est sous la forme d'un ressort disposé sur le corps 6c de la roue d'arrêt 6b et dont la première extrémité 14a est fixée solidairement sur ledit corps 6c et la seconde extrémité 14b est libre et est solidaire du bec de blocage 8.To this end, the elastic member 14 is in the form of a spring arranged on the body 6c of the stop wheel 6b and of which the first end 14a is firmly fixed on the said body 6c and the second end 14b is free and is attached to the blocking spout 8.

La seconde extrémité libre 14b de l'organe élastique 14 porte directement le bec de blocage 8 qui peut être monobloc avec ladite seconde extrémité 14b ou rapporté, ledit bec de blocage 8 étant agencé pour coopérer avec le nez 10a de l'organe de blocage 10.The second free end 14b of the elastic member 14 directly carries the locking lug 8 which can be integral with said second end 14b or attached, said locking lug 8 being arranged to cooperate with the nose 10a of the locking member 10 .

Selon un second mode de réalisation de l'invention, l'agencement du dispositif de blocage 4 selon l'invention et de son organe élastique 14 permet, lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8, d'avoir un amortissement dudit choc comprenant non seulement une partie élastique comme décrit ci-dessus mais également une partie dissipative d'énergie, avantageusement obtenue par frottement.According to a second embodiment of the invention, the arrangement of the blocking device 4 according to the invention and of its elastic member 14 allows, during a shock between the blocking member 10 and the blocking beak 8, to have a damping of said shock comprising not only an elastic part as described above but also an energy dissipating part, advantageously obtained by friction.

Selon une première variante de ce second mode de réalisation, et en référence plus spécifiquement à la figure 7, la roue d'arrêt 6b est formée uniquement par le corps 6c solidaire du pignon 6a. L'organe élastique 14 est sous la forme d'un ressort disposé sur le corps 6c de la roue d'arrêt 6b et dont la première extrémité 14a est fixée solidairement sur ledit corps 6c et la seconde extrémité 14b est libre et est solidaire du bec de blocage 8.According to a first variant of this second embodiment, and with more specific reference to the figure 7 , the stop wheel 6b is formed solely by the body 6c secured to the pinion 6a. The elastic member 14 is in the form of a spring disposed on the body 6c of the stop wheel 6b and whose first end 14a is fixed integrally on said body 6c and the second end 14b is free and is integral with the spout blocking 8.

Le corps 6c porte une goupille 20 et la seconde extrémité libre 14b de l'organe élastique 14 comprend un logement oblong 22 intermédiaire portant lui-même le bec de blocage 8 qui peut être monobloc avec ledit logement 20 ou rapporté. Le logement 22 peut être formé par exemple par une boucle formée à la seconde extrémité 14b de l'organe élastique 14. La goupille 20 peut circuler dans ledit logement 22 permettant un guidage du bec de blocage 8 lorsqu'il est déplacé sous l'effet d'un choc avec le nez 10a de l'organe de blocage 10. Le ressort 14 permet d'assurer la partie élastique de l'amortissement lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8, le frottement de la goupille 20 dans le logement 22 constituant sa partie dissipative.The body 6c carries a pin 20 and the second free end 14b of the elastic member 14 comprises an intermediate oblong housing 22 itself carrying the locking spout 8 which can be integral with said housing 20 or attached. The housing 22 can be formed for example by a loop formed at the second end 14b of the elastic member 14. The pin 20 can circulate in said housing 22 allowing guidance of the locking lug 8 when it is moved under the effect of a shock with the nose 10a of the blocking member 10. The spring 14 makes it possible to ensure the elastic part of the damping during a shock between the blocking member 10 and the blocking beak 8, the friction of the pin 20 in the housing 22 constituting its dissipative part.

Selon une deuxième variante du second mode de réalisation, et en référence aux figures 8 à 12, la roue d'arrêt 6b comprend un corps 6c solidaire du pignon 6a et de son arbre 16, ainsi qu'une planche 24 circulaire, coaxiale et montée libre en rotation par rapport audit corps 6c autour de l'arbre 16. La planche 24 est solidaire du bec de blocage 8 agencé à sa périphérie extérieure afin de pouvoir coopérer avec le nez 10a de l'organe de blocage 10. Le bec de blocage 8 est de préférence monobloc avec la planche 24 mais il peut également être rapporté.According to a second variant of the second embodiment, and with reference to the figures 8 to 12 , the stop wheel 6b comprises a body 6c integral with the pinion 6a and its shaft 16, as well as a circular plate 24, coaxial and mounted free in rotation with respect to said body 6c around the shaft 16. The plate 24 is integral with the locking lip 8 arranged at its outer periphery in order to be able to cooperate with the nose 10a of the locking member 10. The locking lip 8 is preferably one piece with the board 24 but it can also be attached.

L'organe élastique 14 est agencé pour lier solidairement en rotation le corps 6c et la planche 24 lorsque l'organe de blocage 10 n'est pas dans sa première position d'arrêt, le rouage étant alors libre de tourner et d'entrainer le mobile d'arrêt 6, en entrainant ensemble le corps 6c et la planche 24, et pour permettre un déplacement relatif entre le corps 6c et la planche 24 lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8 lorsque l'organe de blocage 10 est passé dans sa première position d'arrêt, de sorte l'amortissement du choc comprend une partie élastique ainsi qu'une partie dissipative d'énergie par frottement. En effet, la planche 24 et le corps 6c sont configurés pour présenter respectivement des surfaces en contact les unes des autres, agencées pour générer des frottements lors du déplacement relatif entre le corps 6c et la planche 24 suite au choc entre l'organe de blocage 10 et le bec de blocage 8. D'une manière avantageuse, la planche 24 et le corps 6c sont agencés pour présenter un diamètre de pivotement volontairement important afin d'augmenter les frottements et de dissiper un maximum d'énergie lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8.The elastic member 14 is arranged to bind the body 6c and the plate 24 integrally in rotation when the locking member 10 is not in its first stop position, the gear train then being free to turn and drive the mobile stop 6, by driving together the body 6c and the board 24, and to allow relative movement between the body 6c and the board 24 during an impact between the blocking member 10 and the blocking beak 8 when the blocking member 10 is passed through its first stop position, so the shock absorption comprises an elastic part as well as a part which dissipates energy by friction. Indeed, the board 24 and the body 6c are configured to respectively have surfaces in contact with each other, arranged to generate friction during the relative movement between the body 6c and the board 24 following the impact between the blocking member 10 and the locking beak 8. Advantageously, the board 24 and the body 6c are arranged to have a deliberately large pivoting diameter in order to increase friction and dissipate a maximum of energy during an impact. between the blocking member 10 and the blocking spout 8.

De préférence, comme le montrent les figures 8 et 9, l'organe élastique 14 est sous la forme d'un ressort disposé de manière circulaire sur le corps 6c de la roue d'arrêt 6b, coaxialement à l'arbre 16. L'organe élastique 14 qui comprend une première extrémité 14a qui est fixée solidairement au corps 6c de la roue d'arrêt 6b, et une seconde extrémité 14b qui est fixée solidairement à la planche 24 au moyen d'un élément de fixation 26, tel qu'un clou monté traversant dans la seconde extrémité de l'organe élastique 14 et fixé dans un orifice 27 prévu sur la planche 24. De préférence, l'élément de fixation 26 est positionné dans la planche 24 à proximité immédiate et radialement au bec de blocage 8.Preferably, as shown by figures 8 and 9 , the elastic member 14 is in the form of a spring arranged in a circular manner on the body 6c of the stop wheel 6b, coaxially with the shaft 16. The elastic member 14 which comprises a first end 14a which is solidly fixed to the body 6c of the stop wheel 6b, and a second end 14b which is solidly fixed to the board 24 by means of a fixing element 26, such as a nail mounted through the second end of the elastic member 14 and fixed in an orifice 27 provided on the board 24. Preferably, the fixing element 26 is positioned in the board 24 in the immediate vicinity and radially of the locking spout 8.

De plus, le corps 6c comprend une lumière oblongue 28 dans laquelle ledit élément de fixation 26 peut circuler lors d'un déplacement relatif entre le corps 6c et la planche 24 lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8.In addition, the body 6c comprises an oblong slot 28 in which said fixing element 26 can circulate during a relative movement between the body 6c and the board 24 during an impact between the locking member 10 and the beak of blockage 8.

La lumière oblongue 28 est de forme circulaire concentrique au corps 6c et à la planche 24. D'une manière avantageuse, l'organe élastique est pré-armé et la longueur de la lumière 28 est choisie de sorte que son extrémité avant 28a (cf. figure 12) constitue une butée pour l'élément de fixation 26 afin de garantir le positionnement correct de la planche 24 et donc du bec de blocage 8 lorsque le corps 6c et la planche 24 sont liés solidairement en rotation. La longueur de la lumière 28 est également choisie de sorte que son extrémité arrière 28b (cf. figure 12) constitue une butée pour l'élément de fixation 26 afin de garantir que le ressort ne plastifie pas lorsque sa course maximale est atteinte.The oblong slot 28 is circular in shape concentric with the body 6c and the board 24. Advantageously, the elastic member is pre-armed and the length of the slot 28 is chosen so that its front end 28a (cf. . figure 12 ) constitutes a stop for the fixing element 26 in order to guarantee the correct positioning of the board 24 and therefore of the locking lug 8 when the body 6c and the board 24 are integrally connected in rotation. The length of the light 28 is also chosen so that its rear end 28b (cf. face 12 ) constitutes a stop for the fixing element 26 in order to guarantee that the spring does not plastify when its maximum travel is reached.

Selon une troisième variante du deuxième mode de réalisation de l'invention, et en référence à la figure 10, le corps 6c de la roue d'arrêt 6b présente sur son pourtour périphérique au moins un bras élastique 30 radial (par exemple trois comme représenté) agencé pour être au contact de la planche 24 de manière à générer des frottements supplémentaires. Chaque bras élastique 30 se termine par un élément de contact 30a agencé pour être en contact avec une surface en correspondance prévue sur la planche 24. Cette friction supplémentaire entre le corps 6c et la planche 24 permet de dissiper encore plus d'énergie par frottement lors d'un choc entre l'organe de blocage 10 et le bec de blocage 8. Dans ce cas, le couple résultant de l'action de l'organe élastique 14 devra être supérieur au couple résultant de la friction des bras élastiques 30 sur la planche 24 afin de garantir le positionnement correct de ladite planche 24 et donc du bec de blocage 8 lorsque le corps 6c et la planche 24 sont liés solidairement en rotation.According to a third variant of the second embodiment of the invention, and with reference to the figure 10 , the body 6c of the stop wheel 6b has on its peripheral periphery at least one radial elastic arm 30 (for example three as shown) arranged to be in contact with the board 24 so as to generate additional friction. Each elastic arm 30 ends in a contact element 30a arranged to be in contact with a corresponding surface provided on the board 24. This additional friction between the body 6c and the board 24 makes it possible to dissipate even more energy by friction during of a shock between the blocking member 10 and the blocking beak 8. In this case, the torque resulting from the action of the elastic member 14 must be greater than the torque resulting from the friction of the elastic arms 30 on the board 24 in order to guarantee the correct positioning of said board 24 and therefore of the locking lug 8 when the body 6c and the board 24 are integrally connected in rotation.

De préférence, l'organe élastique 14, lorsqu'il est rapporté, comme dans les variantes des figures 6 à 12, est par exemple en acier, NiP, ou silicium, le corps 6c de la roue d'arrêt étant par exemple en CuBe et la planche 24 en acier.Preferably, the elastic member 14, when attached, as in the variants of the figures 6 to 12 , is for example made of steel, NiP, or silicon, the body 6c of the stop wheel being for example made of CuBe and the plate 24 made of steel.

Le fonctionnement du mécanisme horloger est le suivant : en référence à la figure 11, lorsque le dispositif de blocage 4 est dans sa seconde position, l'organe de blocage 10 et son nez 10a sont éloignés du mobile d'arrêt 6 de sorte que le rouage 3 est libéré. Sous l'action de l'organe moteur 2, les différents mobiles 3a à 3e du rouage 3 sont entrainés en rotation, le mobile 3e entrainant en rotation le pignon 6a du mobile d'arrêt 6 dans le sens horaire. La rotation du pignon 6a entraine la rotation solidaire de tous les éléments de la roue d'arrêt 6b dans le sens horaire, le corps 6c étant solidaire du pignon 6a et portant l'organe élastique 14, et la planche, dans les variantes où elle est présente, étant liée solidairement en rotation au corps 6c par l'organe élastique 14.The operation of the watch mechanism is as follows: with reference to the figure 11 , when the blocking device 4 is in its second position, the blocking member 10 and its nose 10a are moved away from the mobile stop 6 so that the gear train 3 is released. Under the action of the motor member 2, the various wheel sets 3a to 3e of the gear train 3 are driven in rotation, the wheel set 3e driving the pinion 6a of the stop wheel set 6 in rotation in the clockwise direction. The rotation of the pinion 6a causes the integral rotation of all the elements of the stop wheel 6b in the clockwise direction, the body 6c being integral with the pinion 6a and carrying the elastic member 14, and the board, in the variants where it is present, being integrally connected in rotation to the body 6c by the elastic member 14.

Lorsque l'organe de blocage 10, commandé par son organe de commande 12, est revenu dans sa première position d'arrêt, comme le montre la figure 12, soit après que le mobile d'arrêt 6 portant le bec de blocage 8 a parcouru un certain nombre de tours programmés en fonction du mécanisme horloger (qui peut être une fraction de tour si le mobile d'arrêt comporte plusieurs becs ou s'il y a plusieurs organes de blocage) ou soit après un temps donné ou après une action externe de l'utilisateur sur l'organe de commande 12, le mobile d'arrêt 6 revient buter contre le nez 10a de l'organe de blocage 10. Lors du choc entre le bec de blocage 8 et le nez 10a de l'organe de blocage 10, sous l'action de l'organe élastique 14, l'amortissement dudit choc comprend une partie élastique, assurée par la flexion du ressort, ainsi qu'une partie dissipative d'énergie par frottement de la planche 24 sur le corps 6c, ladite planche 24 s'étant désolidarisée du corps 6c et se déplaçant relativement audit corps 6c, la seconde extrémité 14b de l'organe élastique pouvant se déplacer dans la ganse 28. Dans les variantes des figures 3 à 6, l'amortissement du choc entre le bec de blocage 8 et le nez 10a de l'organe de blocage 10 est seulement de type élastique.When the blocking member 10, controlled by its control member 12, has returned to its first stop position, as shown in figure 12 , or after the stop wheel set 6 carrying the blocking beak 8 has traveled a certain number of revolutions programmed according to the watch mechanism (which may be a fraction of a turn if the stop wheel set has several beaks or if it there are several locking members) or either after a given time or after an external action by the user on the control member 12, the mobile stop 6 comes back to abut against the nose 10a of the locking member 10. During the impact between the blocking beak 8 and the nose 10a of the blocking member 10, under the action of the elastic member 14, the damping of said shock comprises an elastic part, ensured by the bending of the spring, as well a part that dissipates energy by friction of the board 24 on the body 6c, said board 24 having separated from the body 6c and moving relative to the said body 6c, the second end 14b of the elastic member being able to move in the braid 28. In the variants of the figures 3 to 6 , the shock absorption between the locking beak 8 and the nose 10a of the locking member 10 is only of the elastic type.

Une fois le bec de blocage 8 du mobile d'arrêt 6 bloqué par l'organe de blocage 10, le mobile d'arrêt 6 est immobilisé, ce qui arrête le rouage 3 et l'organe moteur 2, jusqu'à ce que l'organe de blocage 10 passe de nouveau dans sa second position et libère le mobile d'arrêt 6.Once the blocking beak 8 of the mobile stop 6 has been blocked by the blocking member 10, the mobile stop 6 is immobilized, which stops the cog 3 and the motor member 2, until the locking member 10 moves back into its second position and releases stop wheel set 6.

Le dispositif de blocage de l'invention, en utilisant un organe élastique intégré (monolithique ou embarqué) au mobile d'arrêt et non à l'organe de blocage, permet audit organe de blocage de rester rigide, ce qui garantit la fiabilité du blocage en rotation du rouage.The blocking device of the invention, by using an elastic member integrated (monolithic or embedded) in the mobile stop and not in the blocking member, allows said blocking member to remain rigid, which guarantees the reliability of the blocking in rotation of the cog.

Le dispositif de blocage de l'invention permet de réduire la force maximale entre le bec de blocage du mobile d'arrêt et le nez de l'organe de blocage et d'augmenter la durée du choc. L'énergie du choc n'est plus dissipée principalement entre l'organe de blocage et le bec de blocage, ce qui entrainait une usure rapide et importante dudit bec de blocage, mais la majorité de l'énergie est dissipée par frottement entre la planche et le corps de la roue d'arrêt, avec une première partie d'amortissement élastique au moment du choc.The blocking device of the invention makes it possible to reduce the maximum force between the blocking nose of the mobile stop and the nose of the blocking member and to increase the duration of the shock. The impact energy is no longer dissipated mainly between the blocking member and the blocking beak, which caused rapid and significant wear of said blocking beak, but the majority of the energy is dissipated by friction between the board and the body of the stop wheel, with a first elastic damping part at the moment of impact.

Ainsi, la présente invention permet de supprimer tous les problèmes liés aux chocs violents, tels que l'usure prématurée du bec de blocage, mais aussi la déformation et le couple de tenue en rotation.Thus, the present invention makes it possible to eliminate all the problems associated with violent shocks, such as premature wear of the locking beak, but also deformation and the rotational holding torque.

Claims (14)

  1. Timepiece mechanism (1) provided with a going train (3) and a locking device (4) for said going train (3), said locking device (4) comprising a stopping mobile (6) arranged to be able to be rotationally driven by the going train (3) and formed of a pinion (6a) and a stopping wheel (6b), said stopping wheel (6b) being arranged to bear a locking beak (8), and a locking member (10) which can move between a first stopping position in which the locking member (10) cooperates with the locking beak (8) to stop the stopping mobile (6) so as to keep the going train (3) stationary, and a second position in which the locking member (10) does not cooperate with the stopping mobile (6), characterised in that the locking device (4) further comprises a resilient member (14) borne by the stopping wheel (6b) of the stopping mobile (6) and arranged to connect the locking beak (8) to said stopping wheel (6b) and to allow, in the event of an impact between the locking member (10) and the locking beak (8), damping of said impact comprising at least one resilient part.
  2. Mechanism as claimed in the preceding claim, characterised in that the stopping wheel (6b) is formed of a body (6c) fixedly attached to the pinion (6a), and in that the resilient member (14) comprises a first end (14a) which is fixedly attached to the body (6c) and a second, free, end (14b) fixedly attached to the locking beak (8).
  3. Mechanism as claimed in claim 2, characterised in that the body (6c) of the stopping wheel (6b) comprises at least one cut-out (18) arranged to form, in the remaining body (6c), the integral resilient member (14), the second end (14b) of the resilient member (14) being arranged to form the locking beak (8).
  4. Mechanism as claimed in claim 2, characterised in that the resilient member (14) is in the form of a spring arranged on the body (6c) of the stopping wheel (6b) and of which the first end (14a) is fixedly attached to said body (6c) and the second end (14b) is free and bears the locking beak (8).
  5. Mechanism as claimed in claim 1, characterised in that the resilient member (14) is arranged to allow, in the event of an impact between the locking member (10) and the locking beak (8), damping of said impact comprising a resilient part and an energydissipating part.
  6. Mechanism as claimed in claim 5, characterised in that the stopping wheel (6b) is formed of a body (6c) fixedly attached to the pinion (6a) and bearing a pin (20), and in that the resilient member (14) is in the form of a spring arranged on the body (6c) of the stopping wheel (6b) and of which a first end (14a) is fixedly attached to the body (6c) and a second end (14b) is free and fixedly attached to the locking beak (8), said second end (14b) comprising a housing (22) in which said pin (20) can move.
  7. Mechanism as claimed in claim 5, characterised in that the stopping wheel (6b) comprises a body (6c) fixedly attached to the pinion (6a) and a disc (24) mounted so as to freely rotate with respect to said body (6c) and fixedly attached to the locking beak (8), in that the resilient member (14) is arranged to connect the body (6c) to the disc (24) for conjoint rotation therewith when the locking member (10) is not in its first stopping position and to allow relative movement between the body (6c) and the disc (24) in the event of an impact between the locking member (10) and the locking beak (8) when the locking member (10) is moved into its first stopping position, and in that the disc (24) and the body (6c) respectively have surfaces in contact with one another, arranged to generate friction.
  8. Mechanism as claimed in claim 7, characterised in that the resilient member (14) is in the form of a spring arranged on the body (6c) of the stopping wheel (6b) and which comprises a first end (14a) which is fixedly attached to the body (6c) of the stopping wheel (6b) and a second end (14b) which is fixed to the disc (24) using a fixing element (26), and in that the body (6c) comprises a lumen (28) in which said fixing element (26) can move during relative movement between the body (6c) and the disc (24).
  9. Mechanism as claimed in any one of claims 7 and 8, characterised in that the body (6c) has, on its peripheral contour, at least one radial resilient arm (30) arranged to be in contact with the disc (24) so as to generate friction.
  10. Mechanism as claimed in any one of the preceding claims, characterised in that the locking member (10) comprises a lever bearing a nose (10a) arranged to cooperate with the locking beak (8) of the stopping mobile (6).
  11. Mechanism as claimed in any one of the preceding claims, characterised in that it comprises a control member (12) arranged to control the positioning of the locking member (10) in one of its first and second positions.
  12. Mechanism as claimed in any one of the preceding claims, characterised in that the pinion (6a) of the stopping mobile (6) meshes with another mobile (3e) of the going train (3).
  13. Mechanism as claimed in any one of the preceding claims, characterised in that it comprises a constant-force device or equalising winding device.
  14. Timepiece, such as a watch or clock, comprising a timepiece mechanism (1) as claimed in any one of the preceding claims.
EP19192436.4A 2019-08-20 2019-08-20 Timepiece mechanism comprising a locking device Active EP3783444B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19192436.4A EP3783444B1 (en) 2019-08-20 2019-08-20 Timepiece mechanism comprising a locking device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19192436.4A EP3783444B1 (en) 2019-08-20 2019-08-20 Timepiece mechanism comprising a locking device

Publications (2)

Publication Number Publication Date
EP3783444A1 EP3783444A1 (en) 2021-02-24
EP3783444B1 true EP3783444B1 (en) 2022-03-09

Family

ID=67659388

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19192436.4A Active EP3783444B1 (en) 2019-08-20 2019-08-20 Timepiece mechanism comprising a locking device

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EP (1) EP3783444B1 (en)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH698418B1 (en) * 2004-04-13 2009-08-14 Pierre Kunz S A instantaneous perpetual calendar.
DE102007042797B4 (en) * 2007-09-07 2010-04-08 Lange Uhren Gmbh Clock
CH707181B1 (en) * 2012-11-14 2017-01-13 Patek Philippe Sa Geneve Horological device comprising a control member kinematically linked to a jumping seconds wheel.
EP3401739B1 (en) 2017-05-08 2019-09-25 Patek Philippe SA Genève Timepiece movement comprising a constant force device

Also Published As

Publication number Publication date
EP3783444A1 (en) 2021-02-24

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