BRACELET THAT INCLUDES A WINDING MECHANISM

Description

[0001] The present invention relates to a watch comprising a watch case containing at least one first movement arranged to produce a first time measurement function, said first movement comprising a first barrel arranged to supply energy to at least said first movement, a regulating system comprising an escapement mechanism and an oscillator, a gear train connecting the first barrel to the regulating system, and a first winding mechanism for the first barrel comprising a first operating member operable by a user, said first winding mechanism for the first barrel being arranged so that the winding of said first barrel is independent of the operation of the first function of the first movement.

[0002] Such an actuation mechanism is typically a winding stem, positioned at 3 o'clock, and movable in a linear fashion to a time-setting position. The mainspring barrel is wound by rotating the winding stem while it is in its winding position.

[0003] It is also possible to wind a barrel of a watch movement linked to a time measurement by many rotations of the crystal bezel, as described in patent CH 118 493.

[0004] Generally, fifteen to thirty turns are required to fully wind the mainspring barrel, whether using the winding stem or the crystal bezel. The user must therefore allow sufficient time to complete all the necessary turns to fully wind a mainspring barrel dedicated to a timekeeping movement.

[0005] This problem of significant time required for maximum winding of the barrel dedicated to a movement linked to a measurement of time arises more particularly when said barrel is a chronograph barrel intended for a chronograph watch comprising a watch movement indicating the current time equipped with its own energy source as well as a chronograph including said chronograph barrel dedicated to said chronograph.

[0006] Such a chronograph watch, comprising a timekeeping movement and a chronograph, each with its own power source in the form of a mainspring barrel, is exemplified by the DEFY El Primero 21 watch offered by Zenith. The use of a separate power source for the chronograph and another for the timekeeping movement, instead of a single common power source, prevents the chronograph from being interrupted when it is running.

[0007] This watch also includes two push-buttons providing control of the chronograph start / stop / reset functions and a single winding stem for winding both barrels, rotating the winding stem in one direction winding the barrel of the movement indicating the current time and rotating the winding stem in the other direction winding the chronograph barrel.

[0008] Separating the chronograph barrel winding mechanism from the chronograph functions, and in particular from the "run" function, allows the chronograph barrel to be wound independently of the chronograph triggering, which allows for a precise start to the time measurement to be timed.

[0009] Furthermore, as with a barrel in a standard movement, the use of a barrel-type energy source for the chronograph makes it possible not to link the winding of its spring when winding the barrel to the unwinding of the spring when the chronograph is running, which allows the chronograph barrel to be wound at any time, even during the operation of the chronograph.

[0010] However, the chronograph's oscillator operates at a high frequency, around 50 Hz, resulting in a short power reserve of approximately 90 to 120 minutes. Given this limited power reserve, there is a high probability of needing to wind the chronograph barrel before or during a time measurement. To fully wind the chronograph barrel, the user must rotate the stem a considerable number of times, for example, around 25 turns. Therefore, the user must allow sufficient time to complete the required number of turns before using the chronograph again.Even though winding the chronograph's mainspring barrel is possible during a time measurement, it becomes difficult for the user to simultaneously manage winding the mainspring through a large number of turns and carefully monitor the event being timed if an accurate measurement is desired. Furthermore, a power reserve mechanism is necessary to confirm to the user that the mainspring barrel has been fully wound in case the number of stem turns was not counted correctly.

[0011] We also know of patent EP 3,059,642, which describes an independent chronograph mechanism comprising a leaf spring as its own power source, arranged to be wound simultaneously with the resetting of the minute counter by pressing a reset pusher. However, even though a simple press of the reset pusher is sufficient to wind the leaf spring and prepare the chronograph for further use, the energy output of such a leaf spring is much lower than that obtained with a mainspring barrel, resulting in a very short 20-minute power reserve for a chronograph oscillator frequency of 5 Hz. Furthermore, such a winding mechanism linked to the reset does not allow the spring to be rewound while the chronograph is running.

[0012] Patents CH 701670 and CH 711239 are also known. The first describes a watch winding mechanism using a movable lug. The movable lug is connected to a barrel wheel via a gear train. A unidirectional winding module, comprising a sliding gear with an input pinion and a reverse pinion that mesh with each other, is interposed between the gear train and the barrel wheel. This module allows the gear train to be coupled to or decoupled from the barrel wheel depending on whether the movable lug is moved in the winding or reverse direction. The second patent describes a watch control device that can be used to operate, wind, or regulate a mechanism. The control device includes a sliding lock on the case that drives a lever, which in turn drives a rack.

[0013] The present invention aims to remedy the aforementioned drawbacks by proposing a watch, such as a pocket watch or a wristwatch, allowing for simple and rapid winding of its power source, requiring few actions from a user, before or during its operation.

[0014] More specifically, one of the aims of the present invention is to provide a chronograph watch allowing simple and quick winding of the chronograph's power source, requiring few actions from a user, before or during the operation of the chronograph, without affecting the accuracy of the time measurements.

[0015] To this end, the present invention proposes a watch according to claim 1.

[0016] The watch according to the invention comprises a watch case containing at least a first movement arranged to produce a first function of measuring time and displaying it on a dial, said first movement comprising a first barrel arranged to supply energy to at least said first movement, a regulating system comprising an escapement mechanism and an oscillator, a gear train connecting the first barrel to the regulating system, as well as a first winding mechanism for the first barrel comprising a first actuating member operable by a user, said first winding mechanism for the first barrel being arranged so that the winding of said first barrel is independent of the operation of the first function of the first movement.

[0017] The first actuating member is arranged to slide on an element of the watch case and to move in rotation in a transverse plane of the watch case by an angle of less than 360°, preferably less than or equal to 180°, and more preferably less than or equal to 90°, at each actuation, between an initial neutral position and a maximum winding position to wind at least partially the first barrel, and the first winding mechanism comprises a first multiplicative winding train connecting the first actuating member to the first barrel, said first multiplicative winding train being arranged to obtain maximum winding of the first barrel in at least one actuation of the first actuating member, and in at most ten, preferably at most five successive actuations of said first actuating member.

[0018] Thus, the invention allows the user to quickly, in very few movements, or even in a single movement, and in an ergonomic manner, wind a barrel dedicated to a movement linked to a measurement of time.

[0019] Advantageously, the first actuating member is arranged to move in rotation through an angle less than or equal to 120°, preferably less than or equal to 90°, and more preferably less than or equal to 45°, at each actuation, between its initial neutral position and its maximum winding position, the first multiplicative winding train being arranged to obtain maximum winding of the first barrel in less than five actuations of the first actuating member, and preferably in less than three actuations of said first actuating member.

[0020] Preferably, the first actuating member is arranged to move in rotation through an angle less than or equal to 45°, at each actuation, between its initial neutral position and its maximum winding position, the first multiplicative winding gear being arranged to obtain the maximum winding of the first barrel in a single actuation of said first actuating member.

[0021] Advantageously, the first barrel comprises a drum arranged to cooperate with the gear train, a barrel arbor around which the drum is mounted to rotate freely, a spring housed within the drum, the outer end of which is coupled to the drum and the inner end to the barrel arbor. The first winding mechanism of the first barrel comprises a winding wheel cooperating with the first multiplicative winding gear train, coaxial and fixed in rotation to the barrel arbor. The winding wheel and the barrel arbor are arranged to be driven in rotation when the first actuating member is operated to wind said spring, independently of the operation of the first function of the first movement. Said winding wheel is advantageously provided with a pawl preventing the spring from being unwound by the barrel arbor.

[0022] The first winding mechanism of the first barrel includes, between the first actuating member and said first barrel, a unidirectional drive device arranged to kinematically link the first actuating member to the first barrel during its movement from its initial neutral position to its maximum winding position and to disengage the first actuating member of the first barrel during a return of said first actuating member from its maximum winding position to its initial neutral position.

[0023] Advantageously, the first actuation member may be a latch arranged to slide on the outer surface of the watch case or on one of the elements of the watch case, such as the bezel, the case back or part of the case middle if the case middle is in two parts, said element of the watch case being arranged to slide on one of the other elements of the watch case.

[0024] According to a preferred embodiment of the invention, the watch is a chronograph watch, the first movement being a chronograph movement, the first barrel being a chronograph barrel dedicated to said chronograph movement, and the watch case contains a second watch movement indicating the current time and comprising a second barrel arranged to supply energy to said second movement as well as a second winding mechanism for the second barrel comprising a second operating member operable by a user.

[0025] Thus, the invention allows the user to quickly wind a barrel dedicated to a chronograph movement in very few movements, or even in a single movement, and in an ergonomic manner. The invention also allows the chronograph to be wound independently of its activation to ensure the accuracy of time measurements, as well as to be wound during timing to ensure its continued use.

[0026] Other features and advantages of the present invention will become apparent from the following detailed description of various embodiments of the invention, given by way of non-limiting examples, and made with reference to the accompanying drawings in which: there figure 1 is a top view of a first embodiment of a chronograph watch according to the invention; the figure 2 is a top view of the first embodiment of a chronograph watch according to the invention, the actuating member being in its initial neutral position, the maximum winding position being shown in dashed lines; and the figure 3 is a top view of a second embodiment of a chronograph watch according to the invention.

[0027] With reference to the figure 1 The present invention relates to a chronograph watch 1 comprising as a first movement arranged to produce a first function of measuring time and displaying it on a dial, a chronograph movement and as a second movement arranged to produce a second function of measuring time and displaying it on a dial, a watch movement indicating the current time.

[0028] In the present invention, a movement arranged to perform a time measurement function and display it on a dial is a movement arranged to measure the time interval between midnight and the current time to indicate the current time, or to measure the time interval between a start and a stop during an event and to determine the duration of said event. These types of movements require precise time measurement, so the regulating element is an oscillating system, for example, a balance wheel and hairspring or a flexible-guided oscillator. Therefore, striking mechanisms are excluded from the invention. Indeed, striking mechanisms, not performing time interval measurements requiring precise measurement, only use speed regulators.

[0029] In this description, the term "chronograph" should be taken in its broadest sense, that is, as including all the necessary elements or components arranged to produce all types of time and fractional time counting / countdown, such as, for example, a standard chronograph, a countdown timer, a regatta chronograph, a split-second chronograph, a lightning-fast chronograph, and a fractional-second chronograph.

[0030] The chronograph movement includes a chronograph barrel 4 dedicated to the operation of said chronograph movement, a regulating system 6 comprising an escapement mechanism 8 and an oscillator 10, and a gear train 12 linking the chronograph barrel 4 to the regulating system 6.

[0031] The timekeeping movement has its own power source, such as a mainspring barrel (not shown), its own regulating system 7 comprising an escapement mechanism 9 and an oscillator 11, and its own finishing gear train 13 connecting the mainspring barrel to the regulating system 7. This timekeeping movement also includes its own winding mechanism with its own actuation element, such as a winding stem ending in a winding crown 2, and positioned at 3 o'clock, in the standard manner. Such a timekeeping movement is standard. The components of such a timekeeping movement are known to those skilled in the art and do not require further description. However, it is specified here that the mainspring barrel of the timekeeping movement is superimposed on the chronograph mainspring barrel 4.

[0032] It is possible to provide a single regulating system common to the movement indicating the current time and to the chronograph, arranged appropriately to cooperate on the one hand with the barrel of the movement indicating the current time and on the other hand with the chronograph barrel 4.

[0033] Preferably, the chronograph watch 1 includes as a first regulating system, the regulating system 6 comprising, as a first escapement mechanism, the escapement mechanism 8, and as a first oscillator regulating the chronograph movement, the oscillator 10, and as a second regulating system, the regulating system 7, comprising as a second escapement mechanism, the escapement mechanism 9, and as a second oscillator regulating the clock movement indicating the current time, the oscillator 11 of the traditional balance spring type.

[0034] Preferably, the first oscillator 10 regulating the chronograph movement is a flexible-guided oscillator. Such a flexible-guided oscillator is described, for example, in the applicant's publication EP 3 502 784. Advantageously, the first and second oscillators have different frequencies, the first oscillator dedicated to the chronograph movement having a higher frequency than the second oscillator dedicated to the timekeeping movement indicating the current time.

[0035] More specifically, the second oscillator may have a low frequency, less than 10 Hz, and preferably less than or equal to 5 Hz, and the first oscillator dedicated to the chronograph movement may have a high frequency, greater than 10 Hz, preferably greater than or equal to 20 Hz, and more preferably greater than or equal to 50 Hz.

[0036] Gear 12 is dedicated to the chronograph movement and refers overall to the finishing gear connecting the chronograph barrel 4 to the escapement mechanism 8 defining a time base specific to the chronograph and the chronograph gear including in particular chronograph and minute counters (not shown) driven by the finishing gear and arranged to drive in rotation organs indicating the measured times (not shown).

[0037] The chronograph movement also includes a chronograph mechanism (not shown) that manages the chronograph start / stop / reset functions, arranged to be driven by gear train 12. The chronograph mechanism may be of the column-wheel type, conventionally operated by a pusher (not shown). The chronograph mechanism also includes reset devices, such as pushers, to reset the positions of the time-indicating devices after a measurement.

[0038] Such a chronograph mechanism is well known to those skilled in the art.

[0039] The chronograph movement also includes a winding mechanism 14 for the chronograph barrel 4, arranged to be independent of the chronograph's operation. This means that it is possible to wind the chronograph barrel 4 without activating any of the chronograph's functions, specifically without resetting or starting it, and that winding the chronograph barrel 4 is also possible while the chronograph is running, without affecting the measurements. This independent winding of the chronograph barrel 4 is linked to the construction of the barrel 4 and the use of separate chronograph function controls that are independent of the chronograph barrel winding mechanism.

[0040] The winding mechanism 14 of the chronograph barrel 4 comprises a single actuating member 16, appearing outside the watch case 18, actuable by a user, and dedicated solely to the winding function of the chronograph barrel 4. Thus, the actuating member 16 is different from and independent of the winding crown 2 of the watch movement indicating the standard current time, which allows its winding and setting by rotation of said winding crown, as well as the controls of the chronograph functions.

[0041] According to the invention, the actuation member 16 is arranged to slide on an element of the watch case 18 and to move in rotation in a transverse plane of the watch case 18, with respect to the center of the watch case 18, that is to say in a "horizontal" plane parallel to the dial or perpendicular to a central axis of the case 18 around which said case 18 has a general symmetry of revolution, of an angle less than 360°, preferably less than or equal to 180°, and more preferably less than or equal to 90°, at each actuation, between an initial neutral position and a maximum winding position to wind at least partially the chronograph barrel 4.

[0042] In addition, the chronograph winding mechanism includes a multiplicative winding gear 20 connecting the actuating member 16 to the chronograph barrel 4, said winding gear 20 being arranged to obtain the maximum winding of the chronograph barrel 4 in at least one actuation of the actuating member 16, and in at most ten, preferably at most five successive actuations of said actuating member 16.

[0043] Advantageously, the actuating member 16 is arranged to move in rotation relative to the center of the watch case 18 by an angle less than or equal to 120°, preferably less than or equal to 90°, and more preferably less than or equal to 45°, at each actuation, between its initial neutral position and its maximum winding position, and the multiplicative winding train 20 is arranged to obtain maximum winding of the chronograph barrel 4 in less than five successive actuations of the actuating member 16, and preferably in less than three successive actuations, or even two or a single actuation of said actuating member 16.

[0044] In a particularly preferred manner, the actuating member 16 is arranged to move in rotation relative to the center of the watch case 18 by an angle greater than or equal to 30° and less than or equal to 45°, at each actuation, between its initial neutral position and its maximum winding position, and the multiplicative winding train 20 is arranged to obtain the maximum winding of the chronograph barrel 4 in a single actuation of said actuating member 16.

[0045] The actuation element 16 can be a bolt or a catch, positioned for example between 8 and 9 o'clock, as shown on the figures 1 And 2 The lock can be arranged to rotate relative to the center of the watch case 18, for example clockwise as shown in the figure 2 , at an angle preferably greater than or equal to 30° and less than or equal to 90°, and preferably less than or equal to 45°, at each actuation, between its initial neutral position and its maximum winding position, represented by the bolt 16 in dashed lines. The bolt comprises a head 16a external to the watch case 18, arranged to slide on the case middle 22. For this purpose, a slide is provided in the external surface of said case middle 22, the head 16a of the bolt being arranged to be guided by the slide so as to be able to slide on the external surface of the watch case 18. The head 16a of the bolt is extended by a rack 16b housed inside the watch case 18 and meshing with the first moving part 24 of the winding train 20.

[0046] The actuation member 16 can also be one of the elements of the watch case 18, such as a bezel, the case back or a movable part of the case, said case then being in two parts, said element of watch case being arranged to slide on one of the other elements of the watch case 18 and to move in rotation at each actuation according to the definition of the invention.

[0047] In particular, the actuating member 16 can be a bezel arranged to be mounted movably for rotation on the watch case 18, for example clockwise, as shown in the figure 3The bezel, or one of the other elements of the watch case, can be arranged to rotate about the center of the watch by an angle greater than or equal to 30° and less than 360°, and preferably less than or equal to 180°, and more preferably less than or equal to 90°, or even 45°, with each actuation, between its initial neutral position and its maximum winding position. The bezel includes internal teeth (not shown) that mesh with the first moving part 24 of the winding train 20.

[0048] The multiplicative winding gear 20 includes different moving parts depending on the energy required to wind the chronograph barrel 4. The skilled craftsman knows how to dimension the rack 16b and the moving parts of the winding gear 20 in order to obtain the required multiplicative ratio to achieve the complete winding of the chronograph barrel 4 with the desired number of actuations and angle of rotation per actuation of the actuation member 16.

[0049] The chronograph barrel 4 comprises a drum 26 arranged to cooperate with the gear train 12, and having, for this purpose, on its outer periphery teeth that mesh with a pinion 28a of a wheel 28 of the gear train 12. The chronograph barrel 4 also comprises a barrel arbor 30 around which the drum 26 is mounted to rotate freely, as well as a spring (not shown) housed within the drum 26. The outer end of the spring is coupled to the inner surface of the drum 26 wall in a conventional manner, for example, by means of a flange, which may be sliding to prevent over-tensioning of the spring in the event of over-winding. The inner end of the spring is coupled to a hook provided on a spline of the barrel arbor 30, also in a conventional manner.

[0050] In addition, the winding mechanism of the chronograph barrel 4 includes a winding wheel 32 cooperating with the last mobile 34 of the multiplicative winding train 20, coaxial and rotationally fixed to the barrel shaft 30, the winding wheel 32 and the barrel shaft 30 being arranged to be driven in rotation when the actuating member 16 is actuated to wind the spring and wind the chronograph barrel 4, independently of the operation of the chronograph.

[0051] Advantageously, the winding wheel 32 is of the ratchet type and is equipped with a pawl 36 that prevents the mainspring from being unwound by the barrel arbor 30. Thus, the mainspring is forced to unwind via the drum 26, delivering energy to the gear train 12. The winding wheel 32 and the barrel arbor 30 are immobilized during the unwinding of the mainspring when the chronograph is running. This standard barrel construction applied to the chronograph barrel 4 allows the chronograph barrel 4 to be wound independently of the timing, before or during chronograph operation. More specifically, the chronograph can be started independently of its winding, ensuring precise timekeeping, as the chronograph's start is not disrupted by winding its barrel. The barrel can be wound before using the chronograph to guarantee its proper functioning before it is started.Furthermore, the mainspring barrel can also be wound during timing, ensuring this function is maintained even while the watch is running. This design of the chronograph mainspring barrel also prevents the spring from unwinding when the chronograph is not activated and conserves the chronograph mainspring's energy until the next timing event.

[0052] The maximum winding position of the actuating member 16 corresponds to the position from which the actuating member 16, released by the user, returns to its initial neutral position without acting on the chronograph barrel 4. To this end, the actuating member 16 includes a return spring (not shown) arranged to return it to its initial neutral position, and the winding mechanism 14 of the chronograph barrel 4 includes, between the actuating member 16 and the chronograph barrel 4, a unidirectional drive device 38 arranged to kinematically link the actuating member 16 to the chronograph barrel 4 during its movement from its initial neutral position to its maximum winding position and to disengage the actuating member 16 from the chronograph barrel 4 during a return of said actuating member 16 from its maximum winding position. to its initial neutral position.

[0053] This unidirectional drive device 38 may, for example, comprise a clutch assembly including a pinion 40 and a wheel 42 pivoting relative to each other, a first drive element angularly fixed to the pinion 40 and having elastic pawls, and a second drive element angularly fixed to the wheel 42 and having internal toothed teeth. Such a unidirectional drive device is described, for example, in the applicant's patent EP 2,392,975.The elements of the unidirectional drive device 38 are arranged so that, as illustrated in the example, when the chronograph barrel 4 is wound by the clockwise rotation of the actuating member 16, the counterclockwise rotation of the pinion 40 causes the ends of the elastic pawls to contact the internal toothed teeth, driving the wheel 42 through the pinion 40. This engages the unidirectional drive device 38, enabling it to drive the next moving part 44 of the winding train 20, which meshes with the winding wheel 32 to wind the mainspring and rewind the chronograph barrel 4. When the actuating member 16 is returned to its initial position by its return spring, its counterclockwise rotation causes the pinion 40 to rotate clockwise, so that the pawls do not affect more the teeth of the inner dentition in wolf's teeth.The unidirectional drive device 38 is then disengaged, and the actuating member 16 is dissociated from the winding wheel 32, so that the return to the initial position of the actuating member 16 has no effect on the chronograph barrel 4. It is quite obvious that any other suitable unidirectional drive device can be used.

[0054] The present invention allows the barrel dedicated to a chronograph to be wound quickly, in an ergonomic and brief manner, so as not to inconvenience the user, and offers the possibility of winding the chronograph barrel during use to ensure the chronograph function, as well as a separate triggering of the chronograph to ensure the accuracy of the measured times.

[0055] In addition, the use of a power source, a mechanism including a specific gear train, and a regulating organ dedicated to the chronograph ensures that the movement indicating the current time is never disturbed.

[0056] The present invention can be applied to any movement arranged to produce a time measurement function. For example, in another embodiment not shown, only the mainspring barrel of a timekeeping movement can be wound by a winding mechanism comprising an actuating member according to the invention. In this case, the winding stem connected to said timekeeping movement no longer has a winding function but only a time-setting function. Those skilled in the art know how to dimension the actuating member and the moving parts of the winding train connecting said actuating member to the mainspring barrel of the timekeeping movement in order to obtain the required multiplicative ratio for fully winding the mainspring barrel of the timekeeping movement with the desired number of actuations and the angle of rotation per actuation of the actuating member 16 according to the invention.

[0057] In this variant, the invention allows the barrel of a standard watch movement indicating the current time to be wound quickly in an ergonomic and brief manner.

[0058] In another variant, not shown, in which the watch comprises a timekeeping movement and a chronograph movement as described in the example above, the actuating member of the timekeeping movement is no longer the winding stem but is combined with the actuating member of the chronograph movement's winding mechanism. In this case, the winding mechanism of the timekeeping movement includes a second multiplicative winding gear connecting the actuating member 16 to the mainspring barrel of the timekeeping movement. This second multiplicative winding gear is arranged to achieve maximum winding of the mainspring barrel of the timekeeping movement in at least one actuation of the actuating member 16, and at most ten, preferably at most five, successive actuations of said actuating member 16.For this purpose, for example, rack 16b is configured to mesh with the first moving part of each of the multiplicative winding gears simultaneously. Those skilled in the art know how to dimension the actuating member and the moving parts of each of the multiplicative winding gears connecting said actuating member to the chronograph barrel and the barrel of the current time movement in order to obtain the required multiplicative ratios for fully winding the chronograph barrel and the barrel of the current time movement with the desired number of actuations and angle of rotation per actuation of the actuating member 16 in accordance with the invention.

[0059] In this variant, the invention allows both the chronograph barrel and the barrel of a standard watch movement indicating the current time to be wound quickly in an ergonomic and brief manner.

Claims

1. Watch (1) comprising a watchcase (18) enclosing at least a first movement arranged to produce a first function of measuring time, said first movement comprising a first barrel (4) arranged to supply power to at least said first movement, a regulating system (6) comprising an escapement mechanism (8) and an oscillator (10), a gear train (12) connecting the first barrel (4) to the regulating system (6), as well as a first winding mechanism (14) for the first barrel (4) comprising a first actuating member (16) which can be actuated by a user, said first winding mechanism (14) for the first barrel (4) being arranged so that the winding of said first barrel (4) is independent of the operation of the first function of the first movement, said first actuating member (16) being arranged to slide on an element of the watchcase (18) and to move in rotation in a transverse plane of the watchcase (18), upon each actuation, by an angle less than 360°, preferably less than or equal to 180°, and more preferably less than or equal to 90°, between a neutral initial position and a maximum winding position in order to wind, at least partially, the first barrel (4), the first winding mechanism (14) comprising a first multiplying winding gear train (20) connecting the first actuating member (16) to the first barrel (4) and, between the first actuating member (16) and said first barrel (4), a unidirectional drive device (38) arranged to kinematically connect the first actuating member (16) to the first barrel (4) during its movement from its neutral initial position to its maximum winding position and to decouple the first actuating member (16) from the first barrel (4) during a return of the first actuating member (16) from its maximum winding position to its neutral initial position, characterised in that said first winding gear train (20) is arranged to achieve the maximum winding of the first barrel (4) in at least one actuation of the first actuating member (16), and in at most ten, preferably at most five actuations of said first actuating member (16), and in that the unidirectional drive device (38) is a coupling mobile forming part of the first multiplying winding gear train (20).

2. Watch (1) as claimed in claim 1, characterised in that the first actuating member (16) is arranged to move in rotation by an angle less than or equal to 120°, preferably less than or equal to 90°, and more preferably less than or equal to 45°, upon each actuation, between its neutral initial position and its maximum winding position, and in that the first multiplying winding gear train (20) is arranged to achieve the maximum winding of the first barrel (4) in less than five actuations of the first actuating member (16), and preferably in less than three actuations of said first actuating member (16).

3. Watch (1) as claimed in any one of the preceding claims, characterised in that the first actuating member (16) is arranged to move in rotation by an angle less than or equal to 45°, upon each actuation, between its neutral initial position and its maximum winding position, and in that the first multiplying winding gear train (20) is arranged to achieve the maximum winding of the first barrel (4) in a single actuation of said first actuating member (16).

4. Watch (1) as claimed in any one of the preceding claims, characterised in that the first barrel (4) comprises a drum (26) arranged to cooperate with the gear train (12), a barrel arbor (30) around which the drum (26) is mounted to move in rotation, a spring housed in the drum (26) and of which an outer end is coupled to the drum (26) and an inner end is coupled to the barrel arbor (30), and in that the first winding mechanism (14) for the first barrel (4) comprises a winding wheel (32) cooperating with the first multiplying winding gear train (20), coaxial and attached for conjoint rotation to the barrel arbor (30), the winding wheel (32) and the barrel arbor (30) being arranged to be driven in rotation when the first actuating member (16) is actuated to wind said spring, independently of the operation of the first function of the first movement.

5. Watch (1) as claimed in claim 4, characterised in that the winding wheel (32) is provided with a pawl (36) preventing the unwinding of the spring by the barrel arbor (30).

6. Watch (1) as claimed in any one of the preceding claims, characterised in that the first actuating member (16) is a bolt arranged to slide on the outer surface of the watchcase (18) or one of the elements of the watchcase (18) arranged to slide on one of the other elements of the watchcase (18).

7. Watch (1) as claimed in any one of the preceding claims, characterised in that the first movement is a chronograph movement, the first barrel (4) being a chronograph barrel dedicated to said chronograph movement, and in that the watchcase encloses a second timepiece movement indicating the current time and comprising a second barrel arranged to supply power to said second movement as well as a second winding mechanism for the second barrel comprising a second actuating member which can be actuated by a user.

8. Watch as claimed in claim 7, characterised in that the second actuating member is a winding stem (2).

9. Watch (1) as claimed in claim 7, characterised in that the first actuating member and the second actuating member are merged, the second winding mechanism comprising a second multiplying winding gear train (20) connecting the first actuating member (16) to the second barrel, said second winding gear train being arranged to achieve the maximum winding of the second barrel in at least one actuation of the first actuating member (16), and in at most ten, preferably at most five actuations of said first actuating member (16).

10. Watch (1) as claimed in any one of claims 7 to 9, characterised in that it comprises a first oscillator (10) regulating the first chronograph movement and a second oscillator (11) regulating the second movement indicating the current time.

11. Watch (1) as claimed in claim 10, characterised in that the first oscillator (10) is a flexible guide oscillator.

12. Watch (1) as claimed in any one of claims 7 to 11, characterised in that the first and second barrels are superimposed.