CH715455B1 - Device for correcting a mechanism for displaying a timepiece and timepiece comprising such a device. - Google Patents

Abstract

The invention relates to a device (14) for correcting a time indication (14) provided by a display mechanism (12) of a timepiece comprising a display member (20), comprising: a winding stem (50) arranged to occupy at least one position for correcting the time indication, a pinion mounted integrally in rotation on the winding rod (50), a corrector gear (58) kinematically connected to the pinion when the rod (50) occupies the correction position, and a corrector mobile (68) able to cooperate with the display member (20) and actuated by the corrector return (58). According to the invention, the corrector reference (58) is formed of a ring (60) provided with an inner circumference and an outer circumference, at least one of which is provided with a toothing (62) engaged at the less indirectly with the corrector mobile (68). The invention also relates to a timepiece comprising such a correction device (14).

Description

The present invention relates to the field of watchmaking. It relates more precisely to a device for correcting a mechanism for displaying a time indication, such as a date, a day of the week, a month, etc.

The mechanisms for displaying a time indication generally include one or more display members, such as discs or rings, actuated in rotation by a drive mechanism. Devices for correcting such display mechanisms are well known to those skilled in the art. They mainly comprise a winding stem arranged to occupy at least one position for correcting the time indication, a pinion integral in rotation with the winding stem, a return engaged with the pinion when the stem is in the correcting position and a corrector mobile actuated by the reference and cooperating with a first display member. The assembly is generally mounted on a plate, on the dial side.

When the display mechanism includes two display members, the corrector mobile is mounted between two correction positions, the passage from one correction position to the other being by reversing the direction of rotation of the winding stem. For this purpose, the corrector mobile is, for example, mounted on a rocker actuated by the return. The assembly formed by the gear, the scale and the corrector mobile, is located at 3 o'clock, in the vicinity of the winding stem. It has a large size, which makes its integration inconvenient in the case where other parts are close to the winding stem. This is the case, particularly when the plate is crossed by axes of chronograph counters located near the winding stem. The space available for the correction mechanism of the display mechanism is then greatly limited.

One solution to this difficulty consists in moving the scale unit - corrector mobile to another sector of the plate, for example at 9 o'clock, using a series of freewheel mounted references rotating around the axes of the different counters. This solution heavily clogs the plate. Its implementation is difficult if the plate is already occupied by a drive mechanism.

The present invention overcomes this drawback, by providing a device for correcting a mechanism for displaying a time indication, the toggle - corrector mobile assembly is moved to one of the 9 o'clock sectors , 6 o'clock or 12 o'clock on the stage, while freeing up useful space on the stage.

More specifically, the invention relates to a device for correcting a time indication provided by a display mechanism for a timepiece of the type comprising a first display member, comprising: a winding stem arranged to occupy at least one position for correcting the time indication, a pinion mounted integral in rotation on the winding stem, a corrector reference kinematically connected to said pinion when the rod occupies the correction position, and a corrective mobile cooperating with the display member and actuated by the corrective reference, characterized in that the corrective reference consists of a ring provided with an inner circumference and an outer circumference, at least one of which is with toothing engaged at least indirectly with the corrective mobile.

Thanks to its ring geometry, the corrector reference frees up space inside its inner circumference, which makes it possible to accommodate parts therein, for example counter axes. In addition, if the diameter of the corrector gear is large compared to the other parts of the correction device, the rocker - corrector mobile assembly can be moved away significantly from the immediate vicinity of the winding stem, while freeing up a large space in the inside the corrector reference. In an advantageous embodiment, the corrector reference surrounds all of the counter axes, and moves the scale - corrector mobile assembly at 9 o'clock.

Other features and advantages of the present invention will emerge more clearly from the detailed description which follows of an exemplary embodiment of a device for correcting a display mechanism according to the invention, this example given purely by way of illustration and not limitation only, in conjunction with the appended drawing in which: FIG. 1 is a top view of a correction device according to the invention, FIGS. 2 to 4 are sectional views of this device along axes AA, BB and CC respectively, and Figures 5 and 6 are variants of the correction device according to the invention.

In Figure 1, there is shown a plate 10 for timepiece, on which are mounted, on one side, a movement not shown, of mechanical or electromechanical type, equipped with a chronograph mechanism, and, on the other side, a mechanism for displaying a time indication 12 and its correction device 14. The plate 10 is crossed by a central axis 15 intended to carry members for displaying the hours and minutes not shown , and by two axes 16 and 18, located substantially at 4 o'clock and 8 o'clock respectively, belonging to the minute and hour counters of the chronograph mechanism.

The mechanism for displaying a time indication 12 is of the conventional type. It includes a digital date indicator 20, formed of a ring 22 provided with an internal toothing 24. The date indicator 20 is mounted on a calendar board 26, screwed to the plate 10 and provided with a clearance 28 meant for that purpose. It is angularly positioned by a jumper 29, and held axially and guided in rotation by a holding plate 30 fixed to the calendar board 26. The display mechanism 12 also includes a day display member, such as a hand, not visible in FIG. 1. The day display member is mounted in the center of the plate 10, secured to a mobile 32 formed by a day star 34 and a correction star 36.

The date indicator 20 and the day display member are rotated by a drive mechanism 38 located at 11 o'clock, comprising a drive wheel 40, formed by a wheel 42 and d 'a finger 44 integral in rotation. The finger 44 cooperates on the one hand with the toothing 24 and, on the other hand, with the day star 34. The wheel 42 is itself driven by a pinion 46, kinematically connected to the movement by an axis passing through the plate 10.

The display mechanism 12 thus described is intended to take place behind a dial not shown. It allows the date to be displayed, through a first window in the dial, and the corresponding day of the week, by means of the day hand cooperating with day indications affixed to the dial.

We will now usefully refer to Figures 2 to 4, which illustrate the correction device 14, seen in sections AA, BB and CC. The correction device 14 of the display mechanism 12 conventionally comprises a winding stem 50 mounted guided in rotation in the plate 10. A sliding pinion 52 is mounted integral in rotation on the winding stem 50, movable between a correction position A and a winding position B. In correction position A, it meshes with a first intermediate gear 54, mounted for free rotation on the plate 10, and itself engaged with a second intermediate gear 56 mounted for free rotation on the board 26.

The second intermediate reference 56 is engaged with a corrector reference 58 formed by a ring 60 provided with an internal toothing 62. The corrector reference 58 is mounted guided in rotation by its outer circumference, on the calendar board 26 To this end, a clearance 63 is provided in the calendar board 26. It is, moreover, held axially by three reach screws 64a, 64b, 64c distributed angularly at its periphery. Its diameter is close to the diameter of the date indicator 20, and it is positioned substantially centered, around the axes 15, 16 and 18, of the various elements of the drive mechanism 38, and of the correction device 14.

The corrector reference 58 actuates a double corrector 66 mounted at 9 o'clock on the calendar board 26, and formed by a corrector mobile 68 mounted on a rocker 70. The rocker 70 is pivotally mounted between a first and a second position correction, respectively A ′ and B ′, around a pivot axis XX perpendicular to the plate 10. It comprises a plate 72 mounted on a control wheel 74, with an axis of rotation coinciding with the pivot axis XX, in engagement with the corrector reference 58. The control wheel 74 is, in addition, made partially integral with the board 72 by means of a friction 76. A pinion 78 is mounted on the board 72, integral in rotation with the wheel of control 74, in engagement with the corrector mobile 68. In the first correction position A ', the corrector mobile meshes with the teeth 24 of the date indicator 20, and in the second correction position B', it meshes with an intermediate star e 80, itself engaged with the correction star 36. As a variant of this embodiment, the corrector mobile 68 is mounted as a walkman in an oblong hole made in the calendar board 26, according to a technique well known in the art. tradesman.

Note that the correction device 14 thus described has two important advantages compared to a conventional device. Firstly, thanks to the ring geometry of the corrector reference 58, space is freed in its center. This space is occupied, in this case, by parts belonging to the drive mechanism 38, to the correction device 14 itself, and by the axes 15, 16 and 18. Secondly, thanks to its diameter close to that of the date indicator 20, that is to say of the order of two-thirds of the diameter of the plate 10, the corrector reference 58 makes it possible to move the double corrector 66, which, due to the presence of the 'axis of the minute counter 16 at 4 o'clock, cannot be mounted in the vicinity of the winding stem 50. In the present case, the double corrector 66 is moved at 9 o'clock, but it could also be moved at 6 o'clock or at 12 o'clock, or in any location of the plate 10 free to receive it. In addition, the double corrector 66 is moved relative to the plate 10, without losing useful space thereon. This arrangement of the correction device 14 is advantageous for a plate 10 pierced with several axes, practically whatever the position of these axes. It will be seen hereinafter that other arrangements of the correction device 14 can be envisaged for particular axis positions.

The operation of the correction device 14 is as follows. When the winding stem 50 is actuated in the counterclockwise direction, the sliding pinion 52 being in the correction position A, the first intermediate gear 54 is driven in the counterclockwise direction, and it itself drives the second gear intermediate 56 clockwise. The latter meshes with the corrector gear 58, which rotates clockwise, and in turn drives the control wheel 74 of the rocker 70 clockwise. The control wheel 74 pivots the board 72 under the effect of friction 76, until the corrector mobile 68 meshes with the date indicator 20. The control wheel 74 then separates from the board 72, and actuates the corrector mobile 68 by means of the pinion 78. The corrector mobile 68 corrects the date indicator 20 by rotating it counterclockwise. When the winding stem 50 is actuated clockwise, the sliding pinion being in correction position A, all of the references 54, 56, 58 rotate in the opposite direction to the previous one, and the rocker 70 pivots in the anti-direction -clockwise until the corrector mobile 68 meshes with the intermediate star 80. This drives the correction star 36 clockwise, thus allowing the correction of the day display member.

We will now refer to Figures 5 and 6 which illustrate variants of the correction device 14 according to the invention.

The correction device 14 illustrated in Figure 5 differs from the device illustrated in Figures 1 to 4, in that the corrector reference 58 is of a diameter less than the radius of the date indicator 20 and in that 'it is off-center with respect to plate 10, so as to occupy essentially the quarter between 3 and 6 o'clock. The space freed in its center is essentially occupied by the minute counter axis 16. It will be noted that the axis 15 at the center of the plate 10 is excluded from this space, unlike the previous embodiment. The double corrector 66 is located at 6 o'clock, that is to say between the axes of the minute counters 16 and 18 hours. In addition, the toothing 24 of the corrector reference 58 is located on its outer circumference and not inside, and the guiding in rotation is ensured by its inner circumference. This arrangement is suitable for a plate 10 pierced with a central axis 15, and two off-center axes 16 and 18, respectively at 4 o'clock and at 8 o'clock.

Finally, the correction device 14 illustrated in Figure 6, differs from the preceding, in that the diameter of the corrector reference 58 is less than the diameter of the date indicator 20, but greater than its radius. The corrector reference 58 is, moreover, off-center relative to the plate 10, so as to occupy essentially the half between 9 hours and 3 hours. The central axis 15 is included in the space freed in its center. As in the previous example, the toothing 24 is external and not internal. The arrangement thus described is suitable for a plate pierced with four axes 15, 16, 18, 82 located respectively in the center, at 4 o'clock, at 8 o'clock and at 6 o'clock.

Other arrangements of corrective devices can be designed as needed. All of these arrangements have in common the fact that they have a corrector reference in a ring, provided with internal or external toothing, mounted guided in rotation by one of its circumferences.

Of course, the corrective device according to the invention is not limited to the embodiments which have just been described and various modifications and simple variants can be envisaged by those skilled in the art without departing from the scope of the invention as defined by the appended claims.

It will be noted in particular that, in the preceding description, the guiding in rotation of the corrector reference 58 is achieved by its outer or inner circumference. As a variant, the corrector reference 58 can be, for example, formed of a ring 60 provided with a circular rib, engaged in a groove made in the calendar board 26.

Note also that the correction device 14 does not include a second intermediate reference 56 in the variants illustrated in Figures 5 and 6. It will be understood, in the same way, that the first intermediate reference 54 is not essential to correction device 14, and that the corrector gear 58 can be mounted in direct engagement with the sliding pinion 52.

Claims (14)

1. Device for correcting a time indication (14) supplied by a display mechanism (12) of a timepiece comprising a display member (20), comprising: A winding rod (50) arranged to occupy at least one position for correcting the time indication, - a pinion (52) mounted integral in rotation on the winding stem (50), A corrector reference (58) kinematically connected to the pinion (52) when the rod (50) occupies the correction position, and A corrector mobile (68) capable of cooperating with the display member (20) and actuated by the corrector reference (58), characterized in that the corrector gear (58) is formed of a ring (60) provided with an inner circumference and an outer circumference, at least one of which has at least one toothing (62) engaged indirectly with the corrector mobile (68). 2. Timepiece comprising a display mechanism (12) comprising a display member (20) and a correction device according to claim 1. 3. Timepiece according to claim 2, characterized in that the corrector gear (58) is mounted guided in rotation by one of its inner or outer circumferences. 4. Timepiece according to claim 2, characterized in that the corrector reference (58) is mounted guided in rotation by a rib integral with the ring (60). 5. Timepiece according to one of claims 2 to 4, characterized in that the correction device is mounted on a plate (10) crossed by several axes (15, 16, 18), and in that the reference corrector (58) is mounted mobile in rotation around at least one of these axes (16). 6. Timepiece according to claim 5, characterized in that the plate (10) is crossed by three axes (15, 16, 18), one of which (15) is centered relative to the plate (10) , and the other two (16, 18) are off-center, and in that the corrector gear (58) is mounted movable in rotation around the three axes (15, 16, 18). 7. Timepiece according to claim 6, characterized in that the display member (20) is formed of a ring (22) and in that the corrector reference (58) is of a diameter corresponding to that of the display member (20). 8. Timepiece according to claim 7, characterized in that the corrector mobile (68) is disposed on the plate (10) substantially at 9 o'clock. 9. Timepiece according to claim 5, characterized in that the corrector gear (58) is mounted movable in rotation about a single off-center axis (16). 10. Timepiece according to claim 9, characterized in that the display member (20) is formed of a ring (22), and in that the corrector reference (58) is of a corresponding diameter to the radius of the display member (20). 11. Timepiece according to claim 10, characterized in that the corrector mobile (68) is disposed on the plate (10) substantially at 6 o'clock. 12. Timepiece according to one of claims 2 to 11, characterized in that the corrector mobile (68) is mounted wandering between a first position (A ') where it cooperates with the display member (20) , and a second position (B ') where it cooperates at least indirectly with a second display member. 13. Timepiece according to claim 12, characterized in that the corrector mobile (68) is mounted on a rocker (70). 14. Timepiece according to claim 12, characterized in that the corrector mobile (68) is mounted walkman in an oblong hole.