CH712518A2 - Display device for a watch movement - Google Patents

Abstract

The invention relates to a display device (9) for clockwork (1), said display device (9) comprising: a first gear (11) intended to be driven by a motor member (3) that comprises said movement (1); a main correction device (15) arranged to selectively drive said first gear (11); a first correction gear (19) comprising a first input arranged to be driven by said first gear (11), a second input to be manually driven in steps, and an output (19c) arranged to drive a first display member (23) a first indication related to time. According to the invention, said display device (9) comprises a second correction gear (57) comprising a first input (57a) arranged to be driven by said output (19c) of said first correction gear (19), a second input ( 57b) to be manually driven in steps, and an output (57c) arranged to drive a second display member (61) of a second time-related indication.

Description

Description TECHNICAL FIELD [0001] The present invention relates to a display device for a watch movement. More particularly, it relates to a device for displaying two indications related to the time which can be corrected according to several correction modes without the risk of deindexing the indications.

State of the Art [0002] Document CH 685 965 G discloses a display device that makes it possible to modify an indication of the time in steps of one hour, without deindexing this indication with respect to that of the minutes. This device comprises a correction star fixed to the hour gun, which is linked to the hour wheel adjusted to free rotation around the barrel via a jumper whose head takes place between two peaks of the star and ensures the angular relation between the latter with respect to the hour wheel. The hour gun can therefore be rotated angularly with respect to the hour wheel by manually acting on the star with a correction lever, an action of said lever generating a pivoting pitch of the star.

This kind of arrangement has become standard for timepieces in two time zones because it allows to change only the angular position of an hour indicator, without deindexing it in relation to the display of minutes. Both indications remain in phase during a correction via the time setting rod. However, actuation of the mechanism by the user to change only the time indication may apply undesirable torque on the finishing train during a correction, because the force exerted by the jumper must be overcome in order to move the star forward or backward. This unwanted couple can hinder movement.

[0004] The document CH 665 930 discloses a timepiece with several time zones in which this disadvantage has been overcome. At the center of the movement is a conventional needle set for local time indication on a 12-hour scale. The hour gun is integral with a pinion which serves as a PTO for a plurality of time indicating devices in other time zones on 24 hour scales. The hour hand for each time zone is driven by an output of a differential gear, one of its inputs being driven by said gear by means of a gear reduction gear. The other input of the differential gear carries a location disc with city indications, which is rotated by a correction rod.

When the part is operating normally, the place disc remains stationary, and the differential gear acts as a single return, the hour hand of the time zone being driven from the hour gun. During a user action on the correction rod, the city disc is rotated and the differential gear drives at the same time the hour hand of the time zone. Through the use of a differential gear, this change in the angular position of the hour hand of the time zone applies substantially no unwanted torque on the work train. Nevertheless, this arrangement does not ensure the correct indexation between the minute hand and the time of hours in the time zone, which can thus take an inappropriate angular position if the user does not perform the adjustment with sufficient care. .

Finally, the document EP 2 663 902 describes a display device whose correction system allows the correction of two information simultaneously, and the correction of one or the other of the latter individually. In this device, the first display member is conventionally driven, and the other is rotatably connected to the output of a differential gear. One of the inputs of this differential gear is driven by the gear train that drives the first display member, and the other is rotatably connected to a correction star. Furthermore, a braking system is provided, which prevents the drive of the second display member when the user wants to correct only the first display member.

However, one of the purposes of this device is to be able, if necessary, decouple the two display members and thus allow their phase shift, which is advantageous for certain applications. Nevertheless, for other applications, such as an indication of hours and minutes, or an indication of the time in several time zones, such a phase shift is not desired and is even contraindicated.

Disclosure of the invention [0008] A main object of the present invention is to overcome the drawbacks of the prior art, by proposing a display device for a watch movement which allows a correction of two time-related indications according to several correction modes, without causing any phase shift in the indications.

To this end, the present invention relates more particularly to a display device for a watch movement, said display device comprising a first gear intended to be driven by a motor member that includes said movement, such as a motor spring housed in a barrel, an electric motor or the like, and a main correction device arranged to selectively drive said first gear. The device further comprises a first correction gear comprising a first input arranged to be driven by said first gear, a second input intended to be manually driven in steps, and an output arranged to drive a first display member of a first gear. time-related indication, such as minutes. This first corrective gear may for example be a differential gear or a rapid corrector of the type commonly used in time display devices in two time zones.

According to the invention, the display device also comprises a second corrective gear, which may be similar to or different from said first corrective gear, and which comprises a first input arranged to be driven by said output of said first corrective gear. It also comprises a second input intended to be manually driven in steps, and an output arranged to drive a second display member of a second indication related to time, such as hours.

Therefore, three choices are presented to the user to correct the display: either all indications continuously via said main correction device, or at the first corrector, which corrects the first indication. stepwise and accordingly causes the second indication, or ultimately exclusively at the second indication. This last correction corrects only the second indication, without influencing the first one, and thus makes it possible to maintain the indexation of the indications.

Advantageously, at least one (or even each) of the corrective gears comprises an input wheel madly mounted on an axis and acting as a first input, said axis (or a wheel integral with the latter) making output office, a star, a sawtooth wheel or any other suitable toothing mounted integral in rotation with said axis, said star respectively sawtooth wheel acting as a second input, and a jumper connecting said input wheel and said star respectively said sawtooth wheel. The star, or the sawtooth wheel, if any, is arranged to be manually pivoted in discrete steps with respect to said input wheel in order to be able to correct the corresponding indication in steps, for example by means of a lever, a hook, or a finger of a mobile. A simple and compact step-by-step correction system is thus proposed as a correction gear.

Alternatively, at least one of the corrective gears comprises a differential gear comprising: a first input mobile acting as a first input, which comprises for example a first sun gear; - A second input mobile in kinematic connection with a star or a sawtooth wheel and acting as a second input, said second input mobile comprising for example a second sun gear; a jumper intended to be mounted on a fixed element such as a frame element and arranged to angularly position said star, respectively said sawtooth wheel, with respect to said fixed element; an output in kinematic connection with each of said input mobiles, comprising, for example, a satellite carrier carrying at least one planet pinion meshing with each of the first and second input mobiles.

Advantageously, a display member, such as a needle, a disk or the like, is carried directly by an axis integral in rotation with said output, for example said carrier-satellite. No intermediate element is thus necessary.

Advantageously, said star respectively said sawtooth wheel is integral in rotation with said second input mobile, for example said second sun gear. A simple and compact construction is thus proposed.

Advantageously, said main correction device, which comprises for example a time-setting rod, a rotating base, a rotating bezel or any other element making it possible to perform this function, is arranged to selectively drive said first gear by via a clutch, which can be arranged to be engaged via an additional control member.

The invention also relates to a watch movement comprising a display device as defined above, as well as a timepiece comprising such a movement.

BRIEF DESCRIPTION OF THE DRAWINGS [0018] Other features and advantages of the present invention will become more apparent upon reading the detailed description of a preferred embodiment which follows, with reference to the accompanying drawings given as non-limiting examples. in which: FIG. 1 is a schematic and simplified diagram of a display device according to the invention; fig. 2 is a simplified schematic side sectional view of a variant of a corrective gear; fig. 3 shows a simplified schematic side sectional view of another variant of a correction gear; and figs. 4 to 6 show perspective views of a concrete embodiment of a display device according to the invention.

Embodiment (s) of the Invention [0019] In the following description, similar structures are represented by the same reference signs to facilitate understanding.

FIG. 1 schematically illustrates the principle of the invention in the context of a watch movement 1. This movement 1 comprises, as generally known, a motor member 3 in kinematic connection with a regulating member 5, via a 7. The regulating member 5 may be for example a conventional balance-sprung assembly associated with any escapement, a vortex, a carousel, an inertial flywheel or even an electronic or electromechanical regulating member. Similarly, the motor member 3 may be a motor spring stored in a barrel, an electric motor or the like.

The motor member 3 also drives a display device 9 according to the invention. This display device comprises a first gear 11, driven by the motor member 3 via a friction wheel 13. The friction wheel 13 serves to disengage the motor member of the first gear 11 when the latter is driven by a main correction device 15, such as a time-setting rod, a telescope or a rotating bottom (e) or the like. The main correction device 15 is selectively kinematically linked to the first gear 11 by means of a time-setting train 16 when a clutch 18 is engaged under the control of an actuator 17. The clutch 18 may for example, a pull-rod system actuated by pulling on a time-setting rod (the rod itself also acting as an actuator 17 in such a case), a sliding pinion 18a or rocking pinion actuated by an additional actuator such as a bolt, a pusher, or the like.

Furthermore, the friction wheel 13 may be substituted by a differential gear or a conventional clutch of the type commonly used in a chronograph mechanism.

Therefore, manipulation of the main correction device 15 acts on the entire display device 9 which is located downstream of the friction mobile 13, and allows a correction of the display member in a "conventional" manner , i.e. continuously, maintaining the indexing of the device.

Downstream of the mobile friction 13 is a first corrective gear 19, comprising two inputs 19a, 19b and 19c output. The first of these inputs 19a is in kinematic connection with the first gear 11, while the other input 19b is arranged to be driven step-by-step following an action by a user (for example by means of a pusher shown schematically by the arrow with rounded end) via a first corrector step-by-step 21. This corrector step-by-step 21, also known as "fast corrector", allows to correct an indication by not, typically corresponding to a division of the amount indicated by the display member associated therewith.

The first correction gear 19 may be a differential gear, as shown schematically in FIGS. 1 and 3, and incorporated in the concrete embodiment set out below in connection with FIGS. 4 to 6. Alternatively, this corrective gear 19 may be a corrective mobile of the type shown schematically and in simplified form in FIG. 2.

The corrector mobile 19 of FIG. 2 comprises an axis of rotation 25 on which is mounted fou an input mobile 27, driven by said first gear 11 and serving as the first input 19a. The input mobile 27 is kinematically linked to a star 29 (or similar) via a jumper 31, said star 29 acting as a second input 19b. Alternatively, the star can be substituted by a sawtooth wheel (see below). This jumper allows the input wheel 27 to drive the star 29 when the torque exerted between the latter two is less than a predetermined value. The star 29 and an output wheel 33 are integral in rotation with the axis 25, the latter driving directly or indirectly a first display member 23. For example, the first display member 23 can be carried directly by the axis 25, which also serves as an output 19c, or can be driven through said output wheel 33. In the context of the present invention, the first display member 23 may indicate the minutes of the time, but any other indication related to time is also possible. The output wheel 33 can be omitted if it is superfluous.

In order to rotate the star 29 relative to the input mobile 27 at a rate of one step, the first step-by-step corrector 21 comprises a rocker 35 pivotally mounted on a frame member (not shown ), said flip-flop 35 being controlled by any control member 37 (for example a push button, a bolt or the like). Alternatively, the rocker 35 can be replaced by an actuating finger carried by a rotating wheel. When the user actuates the control member 37, the end of the rocker 35 enters the toothing of the star 29 to rotate it so that it overcomes the effect of the jumper 31, which falls into the next gap between two teeth in order to reposition the star 29 relative to the input mobile 27. In doing so, the axis 25 and the output wheel 33 rotate with an angular pitch corresponding to that of the tooth of the star 29. The indication of the corresponding display member 23, and that of any display member 61 downstream in the kinematic chain, is thus modified. In the case where the star has been substituted by a sawtooth wheel, said lever 35 may comprise a hook arranged for driving said wheel, in known manner.

The jumper 31 disengaging the input wheel 27 of the star 29 at the time of rapid correction, an operation of the first step-by-step corrector 21 has very little, if any, influence in upstream of said input wheel 27.

On the other hand, if the user engages the main correction device 15 and pivots it, the first correction gear 19 serves as a deflection, its second input remaining inactive since the star 29 is held integral in rotation with the input mobile. 27 This pivoting will thus result in a continuous adjustment of the first display member 23, as well as any display member 61 downstream of the first correction gear 19.

FIG. 3 illustrates schematically and in simplified form a variant of the first correction gear 19 which comprises a differential gear 41. In this variant, the differential gear 41 is spherical, but can also be flat, all the axes of rotation of the pivoting elements being mutually parallel. and perpendicular to the plane of the differential gear.

The first input 19a is constituted by a first input mobile comprising a sun gear 43, which is driven by said first gear 11, and is provided with a toothing for this purpose. The second input 19b is constituted by a second input mobile comprising a second sun gear 45, which is integral in rotation with a star 47. As above, the star 47 can be replaced by a sawtooth wheel where appropriate.

The star 47 is positioned in one of its discrete angular positions by means of a jumper 31, mounted on a fixed element of the frame 49.

The output 19c of the differential gear 41 is formed by a carrier 51, which carries one or more satellites 53 in a known manner, the latter meshing with said solar wheels 43, 45. satellite carrier 51 is integral in rotation with an axis 25, which can be rotatably connected to said first display member 23.

During normal operation of the display device 9, the star 47 remains stationary relative to the frame 49. In order to perform a rapid correction, the first step-by-step corrector 21 comprises a flip-flop 35, controlled by a any control member 37 (for example a push button, a bolt or the like), which rotates the star 47 relative to the frame 49. When the user actuates the control member 37, the end of the lever 35 penetrates into the toothing of the star 47 so as to rotate it so that it overcomes the effect of the jumper 31, which then falls back into the next interstice between two teeth in order to reposition the star 47 with respect to the 49. In doing so, the planet carrier 51 and the axis 25 rotate by an angular pitch corresponding to half that of the toothing of the star 47, since the first inlet 19a can be considered as being substantially motionless compared the rotational speed of the second input 19b. The indication of the corresponding display member 23 and that of any display member 39 downstream in the kinematic chain is thus modified, and the upstream components are not influenced by this correction. As is the case for fig. 2, in the case where the star has been substituted by a sawtooth wheel, said lever 35 may comprise a hook arranged for driving said wheel, in known manner.

However, if the user engages the main correction device 15 and pivots, the differential gear constituting the first correction gear 19 serves as a reference, because its second input remains stationary. This pivoting will therefore result in a continuous adjustment of the first display member 23 with a reduction in speed of rotation by a factor of two.

Returning now to FIG. 1 and continuing downstream along the gear train, the output 19c of the first correcting gear 19 drives a second gear train 55, which is kinematically connected to a first input 57a of a second correcting gear 57, of similar shape to said first correcting gear 19, mutatis mutandis, for example according to one of the schematic variants of FIGS. 2 and 3. The second input 57b of this second correction gear 57 is in kinematic connection with a second corrective step-by-step 59, similar to the first 23. Finally, the output 57c of the second correcting gear 57 directly or indirectly drives a second display member 61. In the case where the second corrective gear 57 takes the form of FIG. 2 and the second display member 61 is integral in rotation with the axis 25, no output wheel 33 is necessary if the train ends with this display member 61.

Figs. 4 to 6 show schematically a concrete embodiment of a display device 9 according to the invention. This embodiment uses corrective gears 19, 57 constituted by differential gears according to FIG. 3, but the modifications necessary to use corrective gears 19, 57 according to FIG. 2 are within the reach of the skilled person. Furthermore, it is also possible to integrate one of each type of corrective gear 19, 57, where appropriate.

A drive member 3 drives the first gear 11 via a friction wheel 13. The friction mobile 13 comprises, on the one hand, a friction wheel 13a meshing with a toothing drum 3a of the motor member, and secondly a pinion 13b. The latter drives said first gear 11, and is also in kinematic connection with a time setting wheel 16. The latter is in kinematic selective connection with a time setting rod 15 via a clutch comprising a sliding pinion 18a. This sliding pinion 18a meshes selectively with a wheel 16a forming part of said time-setting train 16, its position along the time-setting rod 15 being controlled by a lever 17 driven by a control member (not shown). illustrated) such as a pusher, a bolt or the like.

When the sliding pinion 18a is engaged, the user can drive the first gear 11, which ensures the correction of the display members in a continuous manner, the friction 13 avoiding an application of a negative torque on the work train (not shown), which is also driven by the motor member 3.

Following the first gear 11 in the downstream direction, its last wheel meshes with a first input mobile 19a of the first correction gear 19. In the illustrated embodiment, the first corrective gear 19 is a spherical differential gear. It goes without saying that other gear constructions with differential (planar, conical, ...) are also possible. As illustrated, this differential gear comprises a first input mobile comprising a first sun gear with side teeth, a second input mobile 19b comprising a second sun gear also toothed, and an output mobile 19c having a satellite carrier. As is generally known, the carrier carries at least one satellite gear (hidden in the figures by other elements) meshing with each other with the respective edge teeth of the two sun wheels. The planet carrier is integral in rotation with an axis 19d, which can directly carry a first display member 23. Alternatively, this display member 23 can be on another mobile so that it is driven by the axis 19d or the mobile output 19c. In the variant shown, the planet carrier of the output mobile 19c is provided with a peripheral toothing, but another wheel, integral in rotation with the axis 19d and / or the mobile output 19c may be provided.

The second movable input 19b is rotationally secured to a sawtooth wheel 47a, which is angularly positioned via a jumper 31a fixed to the frame (not shown). Alternatively, the sawtooth wheel can be replaced by a star. Still alternatively, the sawtooth wheel 47a (or the star, if any) may be on another mobile in kinematic connection with said second input mobile 19b. In the illustrated variant, the first display member 23 indicates the minutes, and therefore the sawtooth wheel 47a has 30 teeth, in order to be able to modify the angular position of the first display member 23 in steps of 1 / 60th of a turn.

During normal operation of the display device 9, the sawtooth wheel 47a remains stationary, and the first correcting gear 19 serves as a return, the first display member 23 is normally driven by the body motor and / or by the main correction device 15 in case of correction in a continuous manner.

The display device 9 also comprises a flip-flop 35a serving as a first step-by-step corrector 21. As clearly visible in FIGS. 4 and 5, if the rocker 35a is pivoted so that its free end enters the toothing of the sawtooth wheel 47a, the latter is pivoted one step relative to the frame, and is repositioned in its new position angular via the jumper 31a. Therefore, the output mobile 19c is advanced by one step of an angle representing half the angular pitch of the sawtooth, as explained above.

The mobile output 19c also drives the second wheel 55. Therefore, not only a correction through the main correction device 15, but also a step-by-step correction via the flip-flop 35a is transmitted to this second wheel 55.

The second gear 55 leads to the second corrector gear 57, which is of similar construction to said first corrective gear 19, and is reproduced on an enlarged scale in FIG. 5.

The input mobile 57a is driven by the second gear 55, and the second input 57b is integral in rotation with a star 47b, for which the same comments issued above in the context of the toothed wheel of saw 47a apply mutatis mutandis. Since the second display member 61 displays the hours in the illustrated embodiment, the star 47b has six vertices in order to be able to change the angular position of the second display member in 1 / 12th increments of one revolution. This star 47b is also positioned angularly via a jumper 31b, integral with a fixed element (not shown), and can be rotated in steps by an action of the user on a rocker 35b of which free end can penetrate the teeth of the star 47b to advance a step in a known manner.

Similarly to the first display member 23, the second display member 61 is integral in rotation with an axis 57d, itself rotatably integral planet carrier 57c which serves as an output mobile. Again, this display member 61 may alternatively be on a separate mobile, driven directly or indirectly by the planet carrier 57c.

In this variant, since the second correction gear does not involve other elements of the mechanism, the planet carrier 57c is devoid of toothing. Furthermore, a rapid correction of the second display member 23 has no influence on the first display member 23, since the latter is upstream of the first in the drive train.

Several variants of this concrete embodiment are possible. For example, either or both of the corrective gears 19, 57 may be replaced by a corrective gear of the type shown in FIG. 2. Stars and sawtooth wheels can be used interchangeably for elements 47a and 47b. The flip-flops 35a, 35b may each be replaced by a sliding bolt or even a correction finger mounted on a rotating wheel. The planet carrier 19c respectively 57c of one or more of the differential gears 19, 57 may serve as an input, one of the associated sun wheels serving as an input. Moreover, the display device 9 can be arranged to indicate different time divisions, for example the days of the week and the number of the week (for example according to the DIN standard), the months, the years, the phases of the week. moon, tides, and in general any periodic cycle.

Although the invention has been described above in connection with specific embodiments, additional variants are also conceivable without departing from the scope of the invention as defined by the claims.

Claims (10)

claims 1. Display device (9) for clockwork movement (1), said display device (9) comprising: - a first gear (11) intended to be driven by a motor member (3) that comprises said movement (1); a main correction device (15) arranged to selectively drive said first gear (11); a first correcting gear (19) comprising a first input (19a; 27; 43) arranged to be driven by said first gear (11), a second input (19b; 29; 45) intended to be driven manually in steps, and an output (19c; 25,33; 25,51) arranged to drive a first display member (23) of a first time-related indication; characterized in that said display device (9) comprises a second correction gear (57) comprising a first input (57a) arranged to be driven by said output (19c; 25,33; 25; 51) of said first correcting gear ( 19), a second input (57b) to be manually driven in steps, and an output (57c) arranged to drive a second display member (61) of a second time-related indication. 2. A display device (9) according to claim 1, wherein at least one of the corrective gears (19; 57) comprises: - an input wheel (27) idly mounted on an axis (25) and making office of said first input (19a; 57a), said axis (25) or a wheel (33) integral in rotation with said axis (25) acting as said output (19c, 57c); - a star (29) or a sawtooth wheel mounted to rotate with said axis (25) and arranged to be manually pivoted in discrete steps relative to said input wheel (27), said star (29), respectively sawtooth wheel acting as said second input (19b; 57b); - A jumper (31) connecting said input wheel (27) and said star (29) respectively said sawtooth wheel. The display device (9) according to claim 1, wherein at least one of the gears (19; 57) comprises a differential gear (41) comprising: - a first input gear (43; 19a; 57a) acting as said first input (19a, 57a) and including a first sun gear (43); - a second input mobile (45, 47; 19b; 57b) serving as said second input (19b; 57b) and kinematically connected with a star (47; 47b) or a sawtooth wheel (47a); - A jumper (31) to be mounted on a fixed member (49) of the movement (1) and arranged to angularly position said star (47; 47b), respectively said sawtooth wheel (47a); an output (25, 33, 19c, 57c) in kinematic connection with each of said input mobiles (43, 45, 19a, 19b, 57a, 57b). 4. A display device (9) according to claim 3, wherein said first input mobile (43; 19a; 57a) comprises a first sun gear, said second input mobile (45; 19b; 57b) comprises a second sun gear, and said output (51; 19c; 57c) comprises a carrier carrying at least one planet pinion (53) meshing with both each of the first 43; 19a; 57a) and the second (45; 19b; 57b) movable input. 5. Display device (9) according to one of claims 3 and 4, wherein said outlet (51; 19c; 57c) is integral in rotation with an axis (25) carrying a display member (23; 61). 6. Display device (9) according to one of claims 4 and 5, wherein said star (47; 47b), respectively said sawtooth wheel (47a), is rotatably connected to said second mobile input (45; 19b; 57b). The display device (9) according to one of the preceding claims, wherein said time-related indication correction device (15) is arranged to selectively drive said first gear (11) via a clutch. (18). 8. Display device (9) according to claim 7, wherein said clutch (18) is arranged to be engaged via an actuator (17) comprising an additional control member. 9. Watch movement (1) comprising a display device (9) according to one of the preceding claims. Timepiece comprising a clockwork movement (1) according to claim 9.