EP4555385A1 - Mecanisme pour la mesure d'un temps pour mouvement horloger, notamment mecanisme de chronographe - Google Patents
Mecanisme pour la mesure d'un temps pour mouvement horloger, notamment mecanisme de chronographeInfo
- Publication number
- EP4555385A1 EP4555385A1 EP23742288.6A EP23742288A EP4555385A1 EP 4555385 A1 EP4555385 A1 EP 4555385A1 EP 23742288 A EP23742288 A EP 23742288A EP 4555385 A1 EP4555385 A1 EP 4555385A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- mobile
- minute
- return
- hour
- display
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0804—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms
- G04F7/0814—Watches or clocks with stop devices, e.g. chronograph with reset mechanisms with double hammer, i.e. one hammer acts on two counters
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0866—Special arrangements
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/06—Dials
- G04B19/08—Geometrical arrangement of the graduations
- G04B19/082—Geometrical arrangement of the graduations varying from the normal closed scale
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
- G04F7/0828—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement acting in the plane of the movement
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0842—Watches or clocks with stop devices, e.g. chronograph with start-stop control mechanisms
Definitions
- the present invention relates to a mechanism for measuring time, for a watch movement, comprising a time unit counter comprising:
- a display mobile intended to ensure the driving of a display member of the time unit and capable of being placed in kinematic connection with a mobile for driving the watch movement, on demand, in order to be able to be rotated in a predefined direction of rotation from a predefined position throughout the measurement of a time
- a return mobile intended to be pivotally mounted on a frame element so as to be able to pivot between an initial position, associated with the predefined position of the display mobile, and a final position, the display mobile and the mobile return being arranged in such a way that the latter pivots from its initial position to its final position when the display mobile travels substantially one revolution from its predefined position
- an elastic return member arranged to act on the return mobile and tend to return it to its initial position.
- the mechanism according to the present invention is a chronograph mechanism, but this mechanism can also be a countdown mechanism, as an alternative, without departing from the scope of the invention as defined by the appended claims.
- the present invention also relates to a watch movement comprising a chronograph mechanism of this type, as well as a timepiece comprising such a watch movement.
- these mechanisms generally include:
- patent application WO 2018/091696 A1 describes a chronograph mechanism comprising a seconds counter comprising a seconds display mobile capable of being driven on demand from the finishing gear of the corresponding watch movement.
- the seconds display mobile carries a snail cam arranged to cooperate with a feeler subjected to the action of a elastic return member, in such a way that the feeler can act on the cam to return the seconds display mobile to zero as long as it is not driven or subjected to the action of a suitable brake.
- the feeler acts on a winding lever arranged to increment a chronograph minute counter each time the feeler falls from the portion of the cam with the largest radius to the portion with the smallest radius.
- This construction therefore makes it possible to replace the conventional elements constituting the zeroing device, in particular a heart-shaped cam and a hammer intended to act on it to position the display mobile at zero. This makes it possible to respond to a frequent constraint in chronograph mechanisms relating to the high force that it is generally necessary to apply to the reset pusher of the corresponding timepiece, which is often uncomfortable for the user.
- This chronograph mechanism requires delicate focusing and adjustment operations to ensure that the forces of the springs involved, the shapes of the cam and the feeler, as well as the positioning of the pivot center of the latter in reference to the cam, are well adapted to allow its proper functioning.
- this construction lends itself particularly well to the implementation of coaxial displays of the different units of measured times, it presents a relatively large footprint depending on the direction of its thickness.
- a main aim of the present invention is to propose a chronograph mechanism of alternative construction to the constructions known from the prior art, presenting in particular better efficiency, great simplicity and good reliability in its operating kinematics, as well as 'comfortable handling for a user.
- the present invention relates more particularly to a chronograph mechanism of the type mentioned above, characterized in that the display mobile further comprises teeth arranged in engagement with teeth of the return mobile, the teeth of the display mobile having a truncated portion, intended to allow temporary uncoupling between the display mobile and the return mobile when the latter reaches its final position, resulting in a retrograde movement of the return mobile to its initial position at each complete revolution of the display mobile, under the effect of the action of the elastic return member.
- the display mobile is driven in the predefined direction of rotation throughout the measurement of a time, including when its control member elastic return returns from its final position to its initial position, which may possibly happen several times during the measurement of a time of which the duration allows.
- the return mobile returns from its final position to its initial position, therefore in a retrograde manner, the travel of the display mobile is unchanged and continues in the predefined direction of rotation.
- the chronograph mechanism according to the invention also comprises a jumper arranged to be able to cooperate with the display mobile and prevent its rotation at least in the direction of rotation opposite to the predefined direction of rotation.
- a jumper neutralization device operable on demand, arranged to allow the display mobile to return to its predefined position under the effect of the action of the elastic return member on the return mobile.
- the display mobile can be provided with a board having drive teeth through which the display mobile can be placed in kinematic connection with the drive mobile. of the watch movement.
- the jumper has three teeth capable of cooperating with this drive toothing to prevent the rotation of the display mobile in the direction of rotation opposite to the predefined direction of rotation, the three teeth having a pitch p2 strictly greater than the pitch p1 of the drive teeth and strictly less than (3*p1)/2.
- the counter of a unit of time is a seconds counter arranged in such a way that the display mobile makes a complete revolution in sixty seconds, that the mechanism for measuring a time also includes a counter of the minutes of measured time comprising a minute display mobile intended to ensure the training of a member for displaying the minutes of measured time, and that the reminder mobile has a kinematic connection with a minute pawl arranged to cooperate with the minute display mobile and rotate it, to increment or decrement the minute counter, with each complete revolution of the display mobile.
- the elastic return member is arranged to act on the return mobile via a first transmission rocker carrying the minute pawl.
- the minute display mobile also comprises teeth arranged in engagement with a minute reminder mobile intended to be pivotally mounted on a frame element, so as to be able to pivot between an initial position and a final position, both associated with a predefined position of the minute display mobile, that the minute counter further comprises an elastic minute reminder member arranged to act on the minute reminder mobile minutes and tend to bring it back to its initial position, that the teeth of the minute display mobile and the minute reminder mobile are arranged in such a way that the latter pivots from its initial position to its final position when the minute display mobile completes a complete revolution from from its predefined position, and that the teeth of the minute display mobile have a truncated portion, intended to allow temporary uncoupling between the minute display mobile and the minute reminder mobile when the latter reaches its final position, resulting in a retrograde movement of the minute reminder mobile to its initial position at each complete revolution of the minute display mobile, under the effect of the action of the elastic minute reminder member.
- the travel of the minute display mobile continues in the normal driving direction when the measurement of a time is in progress, without any particular impact at each end of turn when the minute reminder mobile returns to its initial position, in a retrograde movement.
- the minute counter is arranged in such a way that the minute display mobile completes a complete revolution in sixty minutes, more preferably in thirty minutes, to benefit from better readability, that the mechanism for measuring a time also comprises a counter of the hours of measured time comprising a mobile display of the hours intended to ensure the training of a member for displaying the hours of measured time, and that the mobile of minute reminder presents a kinematic connection with an hour pawl arranged to cooperate with the hour display mobile and rotate it, to increment or decrement the hour counter, with each complete revolution of the minute display mobile.
- the elastic minute reminder member it is also possible for the elastic minute reminder member to be arranged to act on the minute reminder mobile by via a second transmission rocker carrying the hour pawl.
- the hour display mobile also comprises teeth arranged in engagement with an hour reminder mobile intended to be pivotally mounted on a frame element, so as to be able to pivot between an initial position and a final position, both associated with a predefined position of the hour display mobile, that the hour counter further comprises an elastic hour reminder member arranged to act on the hour reminder mobile and tension to return it to its initial position, that the teeth of the hour display mobile and the hour reminder mobile are arranged in such a way that the latter pivots from its initial position to its final position when the display mobile hours travels a complete revolution from its predefined position, and that the teeth of the hour display mobile have a truncated portion, intended to allow temporary uncoupling between the hour display mobile and the hour reminder mobile when the latter reaches its final position, causing a retrograde movement of the hour reminder mobile to its initial position at each complete revolution of the hour display mobile, under the effect of the action of the reminder member elastic hours.
- the travel of the hours display mobile continues in the normal driving direction when the measurement of a time is in progress, without any particular impact at each end of turn when the hour reminder mobile returns to its initial position, in a retrograde movement.
- the chronograph mechanism includes an hour jumper acting on the hour display mobile to allow its rotation only in the direction of its normal drive when the measurement of a time is in progress. , as well as a device for neutralizing the hour jumper, operable on demand, arranged to allow the hour display mobile to return to its position predefined under the effect of the action of the elastic hour reminder member on the hour reminder mobile.
- the mechanism for measuring a time also includes a minute jumper acting on the minute display mobile to allow its rotation only in the direction of its normal drive when the measurement of a time is in progress, as well as a device for neutralizing the minute jumper, operable on demand, arranged to allow a return of the minute display mobile to its predefined position under the effect of the action of the elastic minute reminder member on the minute reminder mobile.
- the mechanism for measuring time comprises a control mobile capable of pivoting on demand between at least one STOP position and a position RESET, and that the device for neutralizing the seconds jumper and the device for neutralizing the minutes jumper are arranged on the control mobile in such a way that they can act substantially simultaneously on their respective jumpers to neutralize them when the control mobile is moved from its STOP position to its RESET position.
- the mechanism includes an hour jumper
- its neutralization device is arranged on the control mobile, in such a way that all the neutralization devices can act substantially simultaneously on their respective jumpers to neutralize them when the control mobile is moved from its STOP position to its RESET position.
- control mobile also carries a clutch wheel capable of occupying an engaged position, associated with an additional position, START , of the control mobile, to establish a kinematic connection between the display mobile and the watch movement driving mobile, or a disengaged position, associated with the positions STOP and RESET of the control mobile, to interrupt the kinematic link.
- the chronograph mechanism comprises a control member capable of switching on demand between a first state, START, and a second state, STOP, to pivot an intermediate control rocker between a first position, START, and a second position, STOP, the intermediate control rocker being arranged to actuate the control mobile and rotate it between its START and STOP positions.
- the mechanism for measuring a time includes a reset member arranged to be able to act on the intermediate control flip-flop and cause it to pass from one of its first and second positions towards a third position, RESET, in which it activates the control mobile to rotate it into its RESET position.
- the mechanism for measuring a time comprises a spring arranged to tend to position the intermediate control lever in its first position.
- the mechanism for measuring a time comprises a clutch device comprising a clutch wheel and capable of tilting on demand between an engaged state, in which the clutch wheel occupies an engaged position, to establish a kinematic connection between the display wheel and the drive wheel of the watch movement, and a disengaged state, in which the clutch wheel occupies a disengaged position, to interrupt the kinematic connection, the control mobile then being arranged to act on the clutch device, by passing from its STOP position to its RESET position, to pass or maintain the clutch device in its disengaged state.
- the mechanism for measuring a time includes a jumper associated with the first display mobile
- it further comprises a movable actuator between an active position, in which it cooperates with the jumper so as to position at least one of its teeth within reach of the drive teeth of the board of the display mobile, and an inactive position, in which it leaves the jumper free to place all its teeth out of reach of the driving teeth
- the clutch device is also arranged to cooperate with the actuator and make it take its position active in the disengaged state and its inactive position in the engaged state.
- the clutch device comprises an intermediate control rocker arranged to act on the clutch wheel and define its position, the intermediate control rocker then advantageously carrying the actuator for simplify the synchronization of movements of the jumper and the clutch wheel.
- the present invention also relates to a watch movement comprising a mechanism for measuring time, preferably a chronograph mechanism, meeting the characteristics which have just been explained, as well as a timepiece comprising such a movement.
- watchmaker as well as at least one external control member arranged to actuate it in response to a suitable action by a user, that is to say a control member accessible to a user from outside a box of the timepiece.
- FIG. 1 represents a simplified partial front view, in partial transparency, of a chronograph mechanism according to a first preferred embodiment of the present invention
- FIG. 2a to 2c represent simplified front views of construction details of the chronograph mechanism of Figure 1;
- FIG. 3 shows a front view similar to that of Figure 1, certain additional components of the chronograph mechanism according to the first preferred embodiment of the present invention being illustrated;
- FIG. 4 represents a simplified overall front view of the chronograph mechanism according to the first preferred embodiment of the present invention.
- FIG. 5 represents a simplified perspective view of a construction detail of the chronograph mechanism according to the first preferred embodiment of the present invention
- FIG. 6 represents a simplified front view of a construction detail of the chronograph mechanism according to the first preferred embodiment of the present invention
- FIG. 7 represents a simplified partial front view of a chronograph mechanism according to a second preferred embodiment of the present invention.
- FIGS. 8a and 8b represent front views similar to that of Figure 7, in respective first and second configurations, certain components visible in Figure 7 no longer being represented, while certain additional components of the mechanism according to the second preferred embodiment are illustrated;
- Figure 9 shows a simplified partial front view similar to that of Figure 7;
- FIGS. 10a, 10b and 10c represent simplified front views of a construction detail of the chronograph mechanism according to the second preferred embodiment, in three different respective configurations;
- FIGS. 11a, 11b and 11c represent overall front views, partial and simplified, of the mechanism of chronograph according to the second preferred embodiment, in three different respective configurations;
- FIGS. 12a and 12b represent simplified front views of a construction detail of the chronograph mechanism according to the second preferred embodiment, in two different respective configurations;
- FIGS. 13a, 13b and 13c represent simplified front views of a construction detail of the chronograph mechanism according to the second preferred embodiment, in three different respective configurations;
- FIG. 14 represents a simplified perspective view of a construction detail of the chronograph mechanism according to the second preferred embodiment of the present invention.
- FIG. 15 represents a simplified front view of a construction detail of the chronograph mechanism according to the second preferred embodiment of the present invention.
- Figure 1 represents a simplified partial front view, in partial transparency, of a mechanism 1 for measuring a time according to a first variant of a preferred embodiment of the present invention, when the mechanism 1 is implemented in the form of a chronograph mechanism.
- Figure 1 represents a partial view of seconds 2, minutes 4 and hours 6 counters, as well as the corresponding reset devices.
- the seconds counter 2 comprises a seconds display mobile comprising a seconds wheel 8, intended to be driven on demand from a drive mobile (numeric reference 10 in FIG. 5) of the movement corresponding watchmaker, as well as a pinion 12 (visible in transparency) integral with the seconds wheel 8.
- the pinion 12 has truncated teeth, two of its teeth being cut directly at their base.
- the teeth of the pinion 12 are arranged to cooperate with the teeth of a return mobile intended to be pivoted on a frame element of the watch movement, more precisely on a rake 14 that it comprises, the latter being associated to a counterweight 16.
- the teeth of the return mobile also have two truncated teeth, preferably and optionally, as well as a stop 18.
- An elastic return member 20 is arranged to act on the return mobile so as to cause the latter to pivot in the direction of counterclockwise rotation in the view of Figure 1, to tend to return it to a first, initial position , in which the stop 18 is positioned against the teeth of the pinion 12, as illustrated in Figure 1.
- the stop 18 acts as a positioning jumper indexing the return mobile in its initial position.
- the teeth of the pinion 12 and the rake 14 are arranged in such a way that when the seconds wheel 8 completes a complete revolution from its zero position, in the direction of anti-clockwise rotation in the view of Figure 1, the pinion 12 cooperates with the rake 14 to pivot the return mobile from its initial position to a final position, reached by the action of the last tooth of the pinion 12, located immediately before the truncated portion of the teeth following the direction of rotation, on the last tooth of the rake 14.
- the last tooth of the rake 14 is slightly narrower and/or pointed than the other teeth, in order to avoid point-to-point blocking between it and the last tooth of the pinion 12 which training.
- this last tooth of the rake 14 has a length slightly greater than that of the other teeth, to avoid any risk of contact of the other teeth with the teeth of the pinion 12 when the pinion falls. rake 14 towards its initial position, under the effect of the action of its elastic return member 20.
- the seconds wheel 8 makes a complete revolution on itself in sixty seconds and that it is intended to directly carry a seconds display member of a measured time , advantageously a display needle (not shown).
- the return mobile has a retrograde movement whose period is sixty seconds, which makes it possible to size the elastic return member 20 in such a way that the impact on the operation of the watch movement is relatively reduced.
- the minute counter 4 comprises a minute display mobile, intended to drive a minute display member, comprising a minute wheel 22 carrying a pinion 24 whose teeth are truncated and arranged in engagement with teeth provided on a rake 26 of a minute reminder mobile.
- An additional elastic return member 28 is arranged so as to act on the minute return mobile and tend to rotate it in the direction of anti-clockwise rotation in the view of Figure 1, up to a position initial defined by the contact between a stop 29 of the rake 26 and the teeth of the pinion 24.
- the minute display mobile and the minute reminder mobile are preferably arranged in such a way that, when the minute display mobile makes a substantial revolution from its zero position (illustrated in Figure 1), it rotates the minute return mobile from its initial position to a final position, in which the truncated portion of the teeth of the pinion 24 faces the rake 26.
- the action of the member elastic return 28 on the minute return mobile then causes a rapid retrograde movement of the latter to its initial position, without affecting the movement of the minute wheel 22 as long as the measurement of a time is in progress.
- the hour counter 6 comprises an hour display mobile, intended to drive an hour display member, comprising an hour wheel 30 carrying a pinion 32 whose teeth is truncated and arranged in engagement with teeth provided on a rake 34 of an hour reminder mobile.
- An additional elastic return member 36 is arranged so as to act on the hour return mobile and tend to rotate it in the direction of counter-clockwise rotation in the view of Figure 1, up to a position initial defined by the contact between a stop 37 of the rake 34 and the teeth of the pinion 32.
- the hours display mobile and the hours reminder mobile are preferably arranged in such a way that, when the hours display mobile makes approximately one revolution from its zero position (illustrated in Figure 1), it rotates the hour return mobile from its initial position to a final position, in which the truncated portion of the teeth of the pinion 32 faces the rake 34.
- the action of the elastic return member 36 on the mobile recalling the hours then causes a rapid retrograde movement of the latter to its initial position, without affecting the movement of the hour wheel 30 as long as the measurement of a time is in progress.
- Figures 2a, 2b and 2c represent simplified front views of construction details of the different counters, respectively, seconds, minutes and hours.
- the seconds counter 2 advantageously comprises a jumper 40 arranged to cooperate with the seconds wheel 8 and ensure its angular locking in the STOP mode of the chronograph, while letting it rotate in a predefined direction of rotation in START mode, when time measurement is in progress and it is driven by the watch movement.
- the jumper 40 comprises a double beak 42 whose two points are spaced from one another in such a way that the points cooperate in turn with the teeth of the seconds wheel 8 every half step, in other words, the pitch of the jumps of the seconds wheel 8 corresponds to half the pitch of its teeth. Thanks to this feature, the recoil of the 8 seconds wheel is limited when starting the measurement of a time. Furthermore, the use of a brake is not necessary since the jumper 40 ensures that the seconds wheel 8 is maintained in a given position when its drive from the watch movement is interrupted.
- a jumper 44 is associated with the minute wheel 22 and another jumper 46 is associated with the hour wheel 30 to ensure their angular locking when the measurement of a time is interrupted, while allowing these two wheels to rotate, in the direction of their increment, when the measurement of a time is in progress.
- Figure 3 shows a simplified front view similar to that of Figure 1, in which additional construction details are illustrated. [0063] More particularly, Figure 3 illustrates how the minutes 4 and hours 6 counters are driven when the measurement of a time is in progress.
- the chronograph mechanism 1 according to the preferred embodiment of the invention comprises a first transmission rocker 50 intended to be pivoted on a frame element of the watch movement along an axis of rotation 52.
- the first transmission rocker 50 comprises a first arm 54 whose end is connected to the seconds return mobile by an articulation or connection 56 of the linear ball joint type.
- the first transmission rocker 50 comprises a second arm 58 carrying at its end a minute pawl 60, arranged to retract initially to pass from one tooth to the other of the minute wheel 22, when the rocker transmission 50 turns in a first predefined direction of rotation (counterclockwise in the view of Figure 3), then to increment the minute counter when the transmission rocker 50 turns in the opposite direction, driving the minute wheel 22 with it.
- the minute pawl 60 is positioned behind the next tooth of the minute wheel 22 while the seconds return wheel moves from its initial position to its final position, while it rotates the minute wheel.
- minutes 22 of one step in the direction of counterclockwise rotation in the view of Figure 3) during the rapid retrograde movement of the seconds return mobile from its final position to its initial position, i.e. every sixty seconds.
- the chronograph mechanism 1 comprises a second transmission rocker 62 intended to be pivoted on a frame element of the watch movement along an axis of rotation 64 (confused here with that of the hour reminder mobile, at non-limiting illustrative title).
- the second transmission rocker 62 comprises a first arm 66 whose end is connected to the minute return mobile by an articulation or connection 68 of the linear ball joint type.
- the second transmission rocker 62 comprises a second arm 70 carrying at its end a pawl of the hours 72, arranged to retract and pass from one tooth to the other of the hour wheel 30, when the transmission rocker 62 turns in a first predefined direction of rotation (clockwise in the view of Figure 3), and to increment the hour counter when the transmission rocker 62 turns in the opposite direction, driving the hour wheel 30 with it.
- the hour pawl 72 progressively rotates the hour wheel 30 by one step (in the direction of anti-clockwise rotation in the view of Figure 3) while the minute reminder mobile moves from its initial position towards its final position, while it quickly positions itself behind the next tooth of the hour wheel 30 during the rapid retrograde movement of the minute reminder mobile from its final position towards its initial position.
- the minute counter 4 is advantageously arranged in such a way that the minute wheel 22 makes one revolution in sixty minutes, more preferably in thirty minutes.
- the hour counter 6 is made here in such a way that the hour wheel 30 makes one revolution in twenty-four hours, more preferably in twelve hours, for non-limiting purposes of illustration.
- the jumper of each of the three counters makes it possible to maintain the orientation of the corresponding wheel fixed during the return of the associated transmission rocker in its initial position. Indeed, during this operation, which immediately follows an increment of the counter, its wheel no longer undergoes the force which is exerted by the transmission rocker the rest of the time and which opposes the return to zero of the counter under the effect of the action of the corresponding reminder mobile. Thus, when the transmission rockers return to their initial position, only the jumpers oppose the action of the return mobiles and prevent an unexpected return to zero of the counters.
- each of the jumpers only authorizes the rotation of the corresponding counter in a single direction of rotation, that of its increment, the rotation in the direction of resetting to zero, induced by the corresponding reminder mobile, being blocked.
- the components of the chronograph mechanism 1 are carried by one or more frame elements, generally identified by the numerical reference 80, the number and shape of which are of little importance for the implementation of the present invention.
- the frame elements may include a plate for a watch movement or an additional plate specific for the chronograph mechanism 1, and one or more bridges.
- the operation of the chronograph mechanism 1 is here intended to be controlled by a user by means of two pushers (not visible) of the corresponding timepiece, one intended to act on a START/STOP command 82, and the other on a RESET 84 command.
- the START/STOP control 82 carries a pawl 86 arranged to cooperate with a control member here having the shape of a column wheel 88, to rotate it by one step, in the direction of anti-clockwise rotation in the view of Figure 4, each time the user presses the corresponding pusher.
- a jumper 90 also cooperates with the column wheel 88 to define stable angular orientations, in a conventional manner, alternately associated with START and STOP states of the chronograph mechanism 1.
- the column wheel 88 in turn cooperates with a nozzle provided at the free end of a first arm of an intermediate control rocker 92, generally V-shaped.
- the second arm of the intermediate control rocker 92 comprises a spring 94 arranged to split and push the beak of the first arm towards the column wheel 88.
- the free end of the second arm carries a pin 96, which is engaged in a slot provided in an arm 98 of a control mobile 100. The latter is free to rotate with reference to the frame of the watch movement , following an axis of rotation confused here with that of the chronograph seconds counter 2.
- the control mobile 100 is assembled to the frame by three screws 102 engaged in curved slots of a central plate of the control mobile 100.
- the column wheel 88 pivots the intermediate control rocker 92, between a first START position and a second STOP position, which itself pivots the mobile control 100 between a first START position and a second STOP position.
- the control wheel 100 comprises a second arm carrying a clutch wheel 104 capable of occupying two different positions, an engaged position and a disengaged position, depending on the position of the control wheel 100.
- the clutch wheel 104 is part of a clutch device whose construction and operation are more clearly visible in the view of Figure 5.
- the clutch device comprises a clutch mobile 106 comprising two wheels integral with one another in rotation, one of which is in permanent engagement with the drive mobile 10 of the watch movement, and of which the other may or may not engage with the clutch wheel 104 depending on the position in which the control mobile 100 is located.
- the clutch device also comprises an additional wheel 108 coaxial with the clutch mobile 106 and identical to the second wheel of this last.
- the additional wheel 108 is arranged in permanent engagement with the seconds wheel 8 of the seconds counter 2.
- the RESET command 84 is represented more visibly in Figure 6, with the intermediate control flip-flop 92.
- the RESET command 84 comprises a reset member 110 and a reset flip-flop 112, both assembled to the frame by a screw 114 so as to be able to pivot, as well as a rotary lock 116, acting on the reset rocker 112 and actuated by the reset member 110, to give rise to “all or nothing” type operation.
- the reset member 110 carries a first pin 118 arranged to cooperate with the lock 116, to make it rotate, and a second pin 120 arranged to deform a spring 122 carried by the reset rocker. zero 112, when the reset member 110 is actuated while the lock 116 prevents rotation of the reset rocker 112.
- the lock 116 includes a cutout 124 in which a nose 126 secured to the reset rocker 112 is capable of engaging when the cutout 124 faces it.
- the RESET command 84 resumes its rest state (illustrated in Figure 6) without impact on the operation of the chronograph mechanism 1 when the user releases the corresponding pusher before having reached a certain threshold predefined by construction .
- the reset member 110 pivots sufficiently so that the cutout 124 comes to position itself opposite the nozzle 126, the latter can be inserted into the cutout 124 to allow the spring 122 to release the energy it has stored during its deformation.
- the reset rocker 112 suddenly pivots and a finger 128 which it carries can act on the intermediate control rocker 92 to rotate it in the direction of clockwise rotation in the view of Figure 6.
- control mobile 100 notably comprises devices for neutralizing the jumpers of the different chronograph counters, taking the form of two slots 132 and 134 provided in a first lug 130, and of a slot 138 provided in a second ear 136.
- the slot 132 cooperates with the seconds jumper 40 to rotate it clockwise in the view of Figure 4, when the control mobile 100 passes into its RESET position, to move its double beak 42 away from the wheel seconds 8 and thus allow the return of its return mobile to its initial position, leading to a return of the seconds counter 2 to its zero position as explained previously.
- the entrance to the slot 132 is shaped so as to define a stop for the seconds jumper 40 when the control mobile 100 is in its STOP position, to prevent it from moving. pivot in the direction of clockwise rotation in the view of Figure 4, and thus secure the position of the seconds wheel 8 when the measurement of a time is stopped.
- the second slot 134 of the first ear 130 is arranged to cooperate with the minute counter 4. More precisely, the device for neutralizing the minute jumper also includes a minute neutralization rocker 140, pivotally mounted on the frame and carrying a pin 142 housed in the second slot 134. The latter has two successive portions, a first associated with the START and STOP positions of the control mobile 100 and a first angular orientation of the minute neutralization rocker 140, and a second associated to the RESET position of the control mobile 100 and to a second angular orientation of the minute neutralization rocker 140, occupied by the latter after a rotation in the anti-clockwise direction in the view of Figure 4.
- the minute neutralization rocker 140 comprises a first branch 144 arranged to neutralize the minute jumper 44 by rotating it in the direction of clockwise rotation in the view of Figure 4 when the control mobile 100 is pivoted up to its RESET position.
- the minute return mobile can return to its initial position and return the minute counter 4 to its zero position, as explained previously.
- the minute neutralization rocker 140 comprises a second branch 146 arranged to keep the minute pawl 60 away from the minute wheel 22 when it is reset to zero.
- the slot 138 of the second ear 136 is arranged to cooperate with the hour counter 6. More precisely, the device for neutralizing the hour jumper also includes an hour neutralization rocker 150 which is pivotally mounted on the frame and carries a pin 152 housed in the slot 138. The latter has two successive portions, a first associated with the START and STOP positions of the control mobile 100 and a first angular orientation of the hour neutralization rocker 150, and a second associated with the RESET position of the mobile control 100 and to a second angular orientation of the hour neutralization rocker 150, occupied by the latter after a clockwise rotation in the view of Figure 4.
- the hours neutralization rocker 150 comprises a first branch 154 arranged to neutralize the hours jumper 46 by rotating it in the direction of anti-clockwise rotation in the view of Figure 4 when the control mobile 100 is pivoted to its RESET position.
- the hour wheel 30 being released, the hour reminder mobile can return to its initial position and return the minute counter 6 to its zero position, as explained previously.
- the hour neutralization rocker 150 comprises a second branch 156 arranged to keep the hour pawl 72 away from the hour wheel 30 when it is reset to zero.
- the chronograph mechanism 1 When the RESET command 84 is released, the chronograph mechanism 1 returns to its state preceding its activation, START or STOP, depending on the state of the column wheel 88, under the effect of the action of the spring 94 of the intermediate control rocker 92. Thus, the chronograph mechanism 1 here presents a flyback type operation since the measurement of a time can resume as soon as the reset pusher is released if the mode is active during a reset to zero was START mode.
- this construction also makes it possible to limit the stroke and the actuation force of the control pushers associated with this chronograph mechanism, to operate the various functions, which in particular makes it possible to improve the ergonomics and design of these pushers by improving their integration into the caseband.
- this makes it possible to produce pushers having reduced actuation characteristics, for example going from a typical stroke of the order of 0.8 to 1 mm to a reduced stroke of the order of 0.3 mm, and/or a typical actuation force to be applied of the order of 8 to 12 N with a reduced actuation force of the order of 1.5 to 2.5 N (it is thus possible to produce mechanical pushers similar to the electromechanical pushers used on cell phones for example).
- the construction according to the present invention makes it possible to maintain the seconds counter under permanent tension, thus avoiding any chattering of the associated chronograph seconds hand when time measurements are triggered.
- a second alternative embodiment of a chronograph mechanism 201 according to a preferred embodiment of the invention will now be presented in relation to the illustrations of Figures 7 to 15.
- the presentation of this second alternative embodiment focuses mainly on the differences which it presents with reference to the first alternative embodiment which has already been described in detail above.
- Figures 7, 8a-8b, 9 and 10a-10c represent different partial front views of seconds 2, minutes 4 and hours 6 counters according to the second alternative embodiment, the general operating principle of which remains identical to that of the first alternative embodiment and will therefore not be described again in detail.
- Figures 7 and 9 illustrate in particular the seconds counter 2, with its seconds wheel 8 and its pinion 12 with truncated teeth, as well as its return mobile with its rake 14 cooperating with the pinion 12.
- Figures 8a and 8b illustrate in particular the minute counter 4, with its minute wheel 22 and its pinion 24 with truncated teeth, and its return mobile with its rake 26 cooperating with the pinion 24, as well as the counter hours 6, with its hour wheel 30 and its pinion 32 with truncated teeth, and its return mobile with its rake 34 cooperating with pinion 32.
- Figures 7, 8a and 8b The kinematic connections between the different counters are also illustrated in Figures 7, 8a and 8b.
- Figure 7 illustrates how a first transmission flip-flop 50 ensures the connection between the seconds 2 and minute counters 4
- Figures 8a, 8b illustrate how a second transmission flip-flop 62, articulated along an axis of rotation 162, ensures the connection between the minutes 4 and hours 6 counters.
- the elastic return member 20 has preferably been placed further in the kinematic chain, on the first rocker transmission 50, in order to apply the most constant torque possible on the seconds reminder mobile.
- the pinion 12 of the seconds counter 2 pivots by 360°
- the return mobile pivots by approximately 30°
- the first transmission rocker 50 by approximately 5°.
- the section of the corresponding spring is therefore larger and makes it possible to desensitize the system to variations in manufacturing tolerances, while guaranteeing good repeatability in terms of consumption.
- the toothing profiles of the pinion 12 and the rake 14 are preferably drawn in such a way that the system is completely reversible.
- the rake 14 is capable of returning the seconds counter 2 to its zero position (or predefined, in the case of a countdown mechanism) in a retrograde manner under the effect of the elastic return member 20.
- the minute counter 4 is an instantaneous jump counter, and not semi-instantaneous or trailing as in many known calibers.
- a basic principle of the present invention is to use the energy stored in the elastic return member 20 of the seconds, via the rake 14 of the seconds. seconds and the first transmission flip-flop 50, using their instantaneous return at each complete revolution of the seconds counter 2 to increment the minutes counter 4.
- this system allows great precision of the jump moment, without adding additional consumption during the passage of the minute.
- the elastic return member 28 of the minutes return mobile is positioned further in the kinematic chain, on the second transmission rocker 62, in order to limit the variation of its load, and have the most constant and repeatable effort possible.
- the jumper 44 of the minute counter 4 can advantageously be traced with its off-centered point so as to be able to be incremented easily in one direction, but to have a high holding torque in the other direction to prevent the minute counter 4 returns to zero under the action of the minute reminder mobile.
- the hour counter 6 its mode of operation is again based on the same rake system as the seconds 2 and minute counters 4. The movement of the minute rake 26 is used to progressively increment the 6 hour counter, which results in a “semi-trailing” display of the 6 hour counter.
- the shapes of the minute 60 and hour 72 pawls, as well as those of the minute 44 and hour 46 jumpers, are preferably optimized to limit torque variations linked to their interactions with the corresponding counters during the measurement of a time.
- the hour pawl 72 is not in contact with the teeth of the hour wheel 30 during part of the travel of the minute counter 4, with reference to the duration of a complete turn.
- the hour jumper 46 is gradually moved apart by a tooth of the hour wheel 30, and it can advantageously be provided that the beak of the hour jumper 46 and this tooth are in point-on-point configuration a few minutes before the end of a revolution complete of the minute counter 4, for example around twenty-five minutes if the minute counter 4 makes a complete revolution in thirty minutes.
- the tip of the tooth crosses the tip of the beak of the hours jumper 46, the latter can act on the other side of the tooth to rotate the hours wheel 30, in the direction of its normal drive, until it reaches its next discrete position (corresponding here to the next half hour in the case where the minute counter 4 makes one revolution in thirty minutes).
- FIG. 9 represents a simplified partial front view similar to that of Figure 7, illustrating the seconds counter 2 with its return mobile and the first transmission rocker 50 carrying the minutes pawl 60, in the corresponding configuration at approximately thirty seconds, or approximately half a turn of the seconds wheel 8.
- Points P1 and P2 have been identified in Figure 9 to indicate the position of the respective centers of gravity of the seconds return mobile and of the first transmission rocker 50.
- the second alternative embodiment integrates the implementation of a brake system by obstacle of the seconds counter 2 which offers great resistance to shocks. Thanks to this, it is no longer necessary to have a balanced seconds hand to resist shocks in STOP mode of the chronograph mechanism 201. This makes it possible to reduce the inertia of the seconds hand by reducing the dimensions of its balancing sector whose function becomes essentially aesthetic.
- FIGS. 10a, 10b and 10c will now make it possible to present the construction of the seconds jumper 240 according to the second preferred embodiment, the latter playing the role of an obstacle braking system as mentioned above, with a excellent ability to ensure that the orientation of the seconds wheel 8 is maintained in the event of an impact.
- the seconds jumper 240 advantageously has teeth, for example machinable by electroerosion, making it possible to lock the seconds wheel 8 by obstacle and not by friction.
- This toothing is designed so as to limit as much as possible a possible jump of the seconds hand when the teeth of the seconds jumper 240 and of the seconds wheel 8 come into contact.
- the seconds jumper 240 has three teeth, separated from each other by a pitch different from that of the teeth of the seconds wheel 8, these teeth therefore being distributed so as to be able to index the seconds wheel 8 in three different angular orientations, illustrated in Figures 10a, 10b and 10c.
- the teeth of the seconds jumper 240 also have the particularity of being traced with a pulling angle, like a non-return pawl, in such a way that the seconds jumper 240 can lock automatically under the action of a restoring torque that the seconds counter 2 would exert on it. Therefore, this seconds jumper 240 can remain in position and prevent the seconds counter 2 from going back, even in the absence of any preload.
- the seconds wheel 8 is intended to be rotated by the watch movement in the direction of anti-clockwise rotation in the view of Figures 10a at 10c while measuring a beat.
- Such a rotation induces an increasing load on the elastic return member 20 which will thus tend to rotate the seconds wheel 8 in the direction of rotation clockwise via the rake 14 and the pinion 12.
- the seconds wheel 8 is driven, in START mode, it is kept under tension by a clutch wheel in the direction of anti-clockwise rotation, and by the return mobile in the direction of clockwise rotation.
- the chronograph mechanism switches to STOP mode
- the connection between the seconds wheel 8 and the clutch wheel is interrupted and the seconds wheel 8 could then be rotated in the direction of clockwise rotation by the return wheel, in the absence of any countermeasures. It is then that the seconds jumper 240 can perform a braking function by obstacle rather than by friction.
- its teeth are positioned within reach of the teeth of the seconds wheel 8, its pulling angle ensures almost immediate locking of the seconds wheel 8 by bringing their teeth into stop, that is to say with a maximum movement of the seconds hand of +/- 0.375°.
- FIGs 11a, 11b and 11c represent partial and simplified overall front views of the chronograph mechanism 201 according to the second preferred embodiment, in three different respective configurations, in order to explain the general principle. Operating. More precisely, the chronograph mechanism 201 is illustrated in STOP operating mode in Figure 11a, in START mode in Figure 11b and in RESET mode (actuated from START mode here, either flyback or flyback type ) in Figure 11c.
- the second preferred alternative embodiment advantageously provides, but not limited to, the implementation of two commands, a START/STOP (numeral reference 82, visible on the Figures 12a and 12b) and a RESET (numeral reference 84 in Figure 15).
- Figures 12a and 12b illustrate the interaction between the START/STOP command and a control member here also having the shape of a column wheel 88. More precisely, Figure 12a illustrates the START/STOP command 82 and the column wheel 88 in the rest position, while Figure 12b illustrates this device when the START/STOP command 82 is at the end of its travel, after having caused a one-step rotation of the column wheel 88.
- the START/STOP control 82 At rest, the START/STOP control 82 is positioned by its return spring which presses it against a stop (not visible), its pawl 86 then being located set back from the column wheel 88, which is indexed by its long necklace 90.
- the pawl 86 pivots on the START/STOP command 82 to allow the column wheel 88 to pivot directly to its next equilibrium position rather than remaining stuck for a moment in an intermediate position.
- Figure 13a illustrates the configuration of the chronograph mechanism 201 when it is in STOP mode, the clutch device then being in a disengaged state.
- the nose of the intermediate control rocker 202 rests on a column of the column wheel 88.
- the intermediate control rocker 202 acts on the clutch rocker 204 to position it in a first position extreme following a clockwise rotation in the view of Figure 13a, this position being its disengaged position.
- the stops 206 are engaged in slots 208 adapted from the clutch rocker 204, at least one of which is closed at its two ends.
- the intermediate control rocker 202 carries an actuator 210, here preferably having the shape of a straight spring, made in one piece with the intermediate control rocker 202 as non-limiting illustration.
- the actuator 210 is arranged so as to be able to cooperate with the seconds jumper 240 in a manner which will be described below.
- a return spring 212 is also provided to tend to push the nose of the intermediate control rocker 202 towards the column wheel 88, in a conventional manner.
- the START/STOP command 82 rotates the column wheel 88 in the direction of anti-clockwise rotation in the view of Figures 13a to 13c, this which has the effect of positioning a vacuum between two columns facing the nose of the intermediate control rocker 202, as illustrated in Figures 13b and 13c.
- the intermediate control rocker 202 begins to fall between the columns of the column wheel 88 in the configuration of Figure 13b, in particular under the effect of the action of its return spring 212.
- the clutch rocker 204 begins to pivot in the direction of counter-clockwise rotation in the view of Figure 13b, until finally reaching its engaged position illustrated in Figure 13c, in which the clutch wheel 214 is in taken with the seconds wheel 8 to cause it to rotate counterclockwise.
- FIG. 14 illustrates the relative arrangement between the wheel of the drive mobile 10 of the watch movement, the clutch wheel 214 and the seconds wheel 8, to clarify how the clutch device according to the second preferred embodiment variant behaves by changing state, in relation to the illustrations of Figures 13a to 13c.
- the axis of rotation of the drive mobile 10 is fixed, as is that of the chronograph seconds wheel 8.
- the clutch wheel 214 is carried by a shaft 216 to which it is integral, the latter being housed between two fixed bearings (not shown) carried by the frame 80 of the watch movement, so as to be able to move axially by sliding in the bearings (following a distance which may for example be of the order of 0.1 to 0.4 mm, preferably between 0.2 and 0.3 mm).
- the relative positioning of the wheel of the drive wheel 10 and the seconds wheel 8, in particular in the direction of the thickness of the watch movement, and their respective thicknesses are such that the clutch wheel 214 can occupy a first position axial, disengaged, in which it is only engaged with the drive mobile 10 and a second axial position, engaged, in which it is engaged both with the drive mobile 10 and with the wheel of the seconds 8.
- the clutch wheel 214 can advantageously have a bevel cut of its teeth, to avoid remaining in support, tooth on tooth, on the seconds wheel 8 when it moves in its direction by moving from its disengaged position to its engaged position.
- a comparative examination of Figures 13a to 13c highlights the fact that the clutch device comprises a clutch spring 218 arranged to act on the shaft 216 of the clutch wheel 214 and tend to push it back axially in a predefined direction.
- the clutch spring 218 acts here on the clutch wheel 214 to push it towards its engaged position.
- the action of the clutch spring 218 on the shaft 216 generates more friction in STOP operating mode than in START mode, which generally makes it possible to move towards the direction of balancing the respective loads that undergoes the drive mobile 10 in the two operating modes, and therefore the disturbances suffered by the oscillator of the associated watch movement.
- the clutch rocker 204 is arranged to act, on demand, on the shaft 216 of the clutch wheel 214 against the action of the clutch spring 218.
- the clutch rocker 204 in a position such that it presents a suitable stop (not visible, presenting an inclined plane in a manner similar to the clamps of a conventional vertical clutch) facing of the shaft 216 of the clutch wheel 214 to push it towards the front of the figure, such that it is in its disengaged position, that is to say that it is not engaged with the seconds wheel 8.
- the shaft 216 has a slight bevel at its end cooperating with the stop of the clutch rocker 204.
- the bearing of the clutch wheel 214 located on the side of the clutch spring 218 can be arranged in such a way that the clutch spring 218 can bear on it and is not no longer in contact with the shaft 216 of the clutch wheel 214 when the latter occupies its engaged position.
- the clutch spring 218 no longer applies any load to the cog in START operating mode and therefore no longer generates any friction.
- the clutch rocker 204 carries a locking nail 220 arranged so as to be positioned above the clutch wheel 214 when the latter moves into its position. engaged, as illustrated in Figure 13c.
- the preload of the clutch spring 218 is not sufficient to retain the clutch wheel 214 in this position in the event of a significant impact, for example of 500 G, with a component following the direction of the thickness of the watch movement.
- the locking nail 220 thus makes it possible to prevent disengagement in the event of an impact, by limiting the axial movement of the clutch wheel 214.
- this characteristic makes it possible to guarantee perfect synchronization between the moment when the clutch wheel 214 begins to drive the seconds wheel 8 and the moment when the seconds jumper 240 releases it (it is especially important to avoid that the jumper 240 seconds does not release the seconds wheel 8 too early, otherwise it could be dragged backwards under the effect of the action of its return mobile) and, above all, it guarantees the locking of the seconds wheel 8 by its jumper 240 at the precise moment when its drive by the clutch wheel 214 ceases, passing from START mode to STOP mode. Furthermore, this synchronization combined with the cutting of the teeth of the seconds jumper 240 prevents any possibility of the chronograph seconds hand jumping backwards when switching from STOP mode to START mode, as can happen with conventional chronograph mechanisms. , in particular with horizontal clutch.
- the resetting principle consists here, in the context of the second preferred embodiment, of simultaneously releasing all the chronograph counters 2, 4 and 6 of the constraints which lock them, so that they can reset independently of each other under the action of their reminder mobiles.
- This simultaneous release is implemented by an all-or-nothing type control system of robust construction and offering a feeling similar to the START/STOP command.
- This control system includes in particular a control mobile 250 intended to cooperate on demand, by moving from a START/STOP position to a RESET position, with all the jumpers and pawls capable of locking the different counters of chronograph.
- Figure 15 illustrates, in isolation, the control mobile 250 as well as its actuation mechanism, in order to simplify understanding.
- the operating principle of the actuation mechanism according to this second preferred embodiment variant is similar to that of the actuation mechanism according to the first preferred embodiment variant.
- the actuation mechanism comprises a reset member 252, intended to receive a pulse in response to an action by a user on a suitable external control member (not shown), and assembled to the frame 80 of the movement watchmaker so as to be able to pivot along an axis of rotation coincident with the axis of its fixing screw 254.
- the zeroing member 252 is maintained in a rest position, by default, under the effect of the action a return spring 256, here made in one piece with the reset member 252, for non-limiting purposes of illustration.
- the reception of a pulse causes a rotation of the reset member 252 in the direction of clockwise rotation in the view of Figure 15, and aims to induce a rotation of the control mobile 250 in the direction of anti-clockwise rotation. timer, to move it from its START/STOP position to its RESET position.
- a lock 258 is rotatably mounted on the frame of the watch movement, being positioned by default opposite a beak 260 of the control mobile 250 to prevent the rotation of the latter.
- a return spring 262 made in one piece with the lock 258, and resting on a fixed pin 264, ensures the default positioning of the lock 258.
- the zeroing member 252 carries a trigger pin 266 arranged to pivot the lock 258 in the direction of counterclockwise rotation in the view of Figure 15 when the zeroing member 252 pivots (in the clockwise).
- the reset member 252 also carries an actuating pin 268 arranged to cooperate with a reset spring 270 and load it as long as the lock 258 maintains the locking of the control mobile 250.
- the reset spring 270 can suddenly release its energy by causing the control mobile 250 to rotate in the direction of counterclockwise rotation. in the view of Figure 15, towards its RESET position, the latter rotating with it its first 272, second 274, third 276, fourth 278, fifth 280 and sixth arm 282, these defining similar neutralization devices to those already described in relation to the first preferred embodiment.
- the reset member 252 When the reset member 252 is released, it quickly returns to its rest position under the effect of the action of its return spring 256, while the lock 258 initially remains blocked, due to the presence of the nozzle 260 of the control mobile 250 on its return trajectory.
- the reset member 252 drives with it the control mobile 250, by action of its actuating pin 268 on a rigid portion of the latter, and the lock 258 returns to its rest position once the nozzle 260 released.
- control mobile 250 has two different angular positions in the context of this second preferred embodiment, a first STOP (or START) position common to the two START and STOP operating modes of the mechanism. chronograph 201, and a second RESET position for the RESET operating mode.
- control mobile 250 is illustrated in its first position (STARTZ)STOP in Figures 11a and 11b which partially illustrate the chronograph mechanism 201 respectively in its STOP operating mode and in its START operating mode.
- Figure 11c illustrates the RESET operating mode and allows you to see how the chronograph mechanism 201 behaves when the reset member 252 is actuated while the measurement of a time is in progress, this is that is to say in START mode, which corresponds to the function commonly referred to as "flyback".
- the fourth arm 278 of the control mobile 250 cooperates with the seconds jumper 240 to at least define a stop and prevent the jumper from pivoting towards the seconds wheel 8, to release the seconds counter.
- seconds 2 of any constraint and allow it to return to its zero position (or possibly initial in the case of a countdown mechanism) under the effect of the action of its return mobile.
- the fourth arm 278 slightly pushes the seconds jumper 240 during the reset, opposing the actuator 210. Such an action is in any case necessary if the reset zero is activated from STOP mode, in which the seconds jumper 240 is positioned against the seconds wheel 8.
- the fifth arm 280 of the control mobile 250 cooperates with the jumper 46 of the hour counter 6 to push it back and allow the counter to rotate freely, while the sixth arm 282 cooperates with the pawl 72 of the hour counter 6 to ensure that it is not located on the trajectory of the teeth of the hour wheel 30.
- the hour counter 6 is freed from any constraint and can be returned to its zero position (or initial in the case of 'a countdown mechanism) under the effect of the action of its return mobile.
- the control mobile 250 can pivot clockwise in the view of Figure 11c to return to its STOP (or START) position under the effect of its spring. recall 256 as described above. The jumpers and pawls are then also released by the different arms of the control mobile 250 and can return to the position they occupied before the reset was triggered. When the reset is activated from the START mode, a new measurement of a time starts immediately after the release of the zero reset member 252.
- the reset to zero can also be carried out in a similar manner with a prior stopping of the measurement of a time, that is to say when the chronograph mechanism 201 is in the STOP operating mode.
- the second to sixth arms of the control mobile 250 cooperate in a manner similar to what has just been described with the different jumpers and pawls of the different counters, while the first arm 272 is positioned in the immediate vicinity of the rocker. clutch 204 without pushing it back, given that it is then already in its disengaged position.
- control mobile 250 has only two different positions (while the control mobile 100 of the first alternative embodiment had three different positions), a STOP position (for example example, or START) associated with the START and STOP operating modes of the chronograph mechanism 201, and a RESET position associated with the RESET operating mode of the chronograph mechanism 201, the transition from the START operating mode to the STOP mode of the chronograph mechanism 201 , and vice versa, being implemented independently of the control mobile 250.
- STOP position for example example, or START
- RESET position associated with the RESET operating mode of the chronograph mechanism 201
- the return mobiles illustrated in the appended figures have a preferred but optional characteristic: they are balanced from the point of view of mass distribution, each rake being associated with a counterweight, in order to limit the risk of damage to the mechanism in the event of an impact, but those skilled in the art may choose to balance these different components in a manner adapted to their specific needs without departing from the scope of the present invention as defined by the appended set of claims.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Geometry (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP22185019.1A EP4307052A1 (fr) | 2022-07-14 | 2022-07-14 | Mecanisme de chronographe pour mouvement horloger |
| PCT/EP2023/069569 WO2024013346A1 (fr) | 2022-07-14 | 2023-07-13 | Mecanisme pour la mesure d'un temps pour mouvement horloger, notamment mecanisme de chronographe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4555385A1 true EP4555385A1 (fr) | 2025-05-21 |
Family
ID=82608202
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22185019.1A Withdrawn EP4307052A1 (fr) | 2022-07-14 | 2022-07-14 | Mecanisme de chronographe pour mouvement horloger |
| EP23742288.6A Pending EP4555385A1 (fr) | 2022-07-14 | 2023-07-13 | Mecanisme pour la mesure d'un temps pour mouvement horloger, notamment mecanisme de chronographe |
Family Applications Before (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP22185019.1A Withdrawn EP4307052A1 (fr) | 2022-07-14 | 2022-07-14 | Mecanisme de chronographe pour mouvement horloger |
Country Status (5)
| Country | Link |
|---|---|
| US (1) | US20260044117A1 (fr) |
| EP (2) | EP4307052A1 (fr) |
| JP (1) | JP2025522960A (fr) |
| CN (1) | CN119547021A (fr) |
| WO (1) | WO2024013346A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US864177A (en) * | 1904-03-22 | 1907-08-27 | Gabriel Lopez Mantaras | Watch. |
| CH688068B5 (fr) * | 1994-07-29 | 1998-02-13 | Technowatch Sa | Dispositif indicateur de seconde pour pièce d'horlogerie. |
| JP2009121962A (ja) * | 2007-11-15 | 2009-06-04 | Seiko Instruments Inc | クロノグラフ表示機構及びこれを備えたクロノグラフ時計 |
| CH711317A2 (fr) * | 2015-07-01 | 2017-01-13 | Richemont Int Sa | Mécanisme de chronographe à rattrapante rétrograde. |
| EP3324245A1 (fr) | 2016-11-17 | 2018-05-23 | Nogerah SA | Système d'entraînement instantané et mécanisme de chronographe équipé d'un tel système |
| EP3869280B1 (fr) * | 2020-02-19 | 2024-04-17 | Montres Breguet S.A. | Mecanisme d'affichage d'horlogerie |
-
2022
- 2022-07-14 EP EP22185019.1A patent/EP4307052A1/fr not_active Withdrawn
-
2023
- 2023-07-13 JP JP2025500833A patent/JP2025522960A/ja active Pending
- 2023-07-13 EP EP23742288.6A patent/EP4555385A1/fr active Pending
- 2023-07-13 US US18/992,013 patent/US20260044117A1/en active Pending
- 2023-07-13 CN CN202380052666.9A patent/CN119547021A/zh active Pending
- 2023-07-13 WO PCT/EP2023/069569 patent/WO2024013346A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2024013346A1 (fr) | 2024-01-18 |
| US20260044117A1 (en) | 2026-02-12 |
| CN119547021A (zh) | 2025-02-28 |
| EP4307052A1 (fr) | 2024-01-17 |
| JP2025522960A (ja) | 2025-07-17 |
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