CH711184B1 - Watch movement comprising a mechanism for rapid correction of the current time. - Google Patents

Abstract

The invention relates to a watch movement (1) comprising: a ring of hours (70) for displaying the current time jumpingly, said ring of hours comprising an internal toothing (710); a display mechanism of the current minute (5; 50); a mechanism arranged to allow correction of the current minute displayed; a fast time correction mechanism displayed by meshing directly with said internal toothing to allow correction of the time without changing the current minute.

Description

Description

TECHNICAL FIELD [0001] The present invention relates to a mechanism for jumping display watch movement.

State of the art [0002] Watch movements with jumping displays are known in watchmaking, in which a time indicator jumps almost instantaneously from one value to another. These jumping displays are used in particular for displaying the date in a window. They are also sometimes used for other indications, including indications of the current time in a window.

In the present application, the expression "jumping display" covers both the displays in which the jump is almost instantaneous displays said trailing in which this jump is slower, the advance of the display being nonetheless discontinuous .

The present invention relates to a movement with display jumping time and in particular a jumping time correction mechanism.

[0005] Retrograde displays, that is to say displays in which a needle or a disc rotates in one direction for a given period of time and then returns almost instantly to its initial position by turning quickly in the opposite direction to the end of this period. For example, these retrograde displays are used to indicate the minutes on a scale from 1 to 60 covering an arc of less than 360 °. These retrograde displays free up space on the dial for other indications. In addition, the fast return of the minutes indicator every hour creates an animation on the face of the watch.

According to one aspect, the present invention also relates to a watch movement combining both a retrograde display and a jumping display.

[0007] As such, watches combining a retrograde display and a jumping display are known. EP 0 950 932 B1 describes for example a watch comprising a 180 ° minute display and a display jumping hours on a disk. The hour disc is operated by a spiral cam.

[0008] CH 691 833 describes another example of a watch comprising a display jumping hours and a retrograde display minutes. A minute rake has two toothed portions, one for transmitting the movement to the minute display member and the other for being driven by a pinion with a missing tooth attached to the hour wheel and driven by one turn per hour. The instantaneous return of the rake corresponds to the displacement of the last tooth of the rake at the level of the missing tooth of the pinion.

CH 698 132 relates to a display showing jumping hours and retrograde minutes display, in which the hour hopping of a ring of hours and the return of the retrograde hand are all caused by the same cam acting on a connecting rod.

[0010] EP 1 134 627 B1 relates to a retrograde triple display (minutes, hours, dates), the hours display being jumping. The retrograde display of hours is by means of a rake going in both directions. The document also describes a mechanism for rapid correction of dates.

[0011] WO 9 740 424 relates to a watch comprising a retrograde display of 180 ° minutes and a jumping digit display of the hours carried by a disk and visible by a window.

[0012] EP 0788 036 B1 relates to a watch with a retrograde display of minutes and a display jumping hours on a disk. A rocker is lifted gradually once an hour by the rotation of a spiral cam secured to the minute wheel.

CH 681 761 relates to a watch having a retrograde display of the date on 240 ° by means of a pinion which lacks teeth.

[0014] EP 2 010 971 B1 relates to a watch comprising a retrograde display of a time information such as the hours over an angular sector of 270 °. The retrograde module includes a cam and a rake.

EP 2 595 006 relates to a mechanical device for a display jumping hours.

DE 10 200 284 C1 relates to a display showing jumping hours and display minutes on a sector of 330 °. A decoupling element is provided between the minute display wheel and the minute drive star.

CH 688 068 relates to a retrograde display of seconds on an angular sector by means of a pinion of minutes which lack teeth and meshing with a rake.

BRIEF SUMMARY OF THE INVENTION [0018] These documents do not describe how the current time and the current minute displayed can be corrected for setting the time.

An object of the present invention is therefore to provide a watch movement for displaying the time jumping and allowing both the correction of the current time displayed and the current minute displayed.

Another object of the present invention is to provide a correction mechanism of the current time displayed which is more convenient than existing mechanisms.

According to the invention, these objects are achieved in particular by means of a watch movement comprising: a ring of hours to display the current time, said ring of hours comprising an internal toothing; a mechanism for displaying the current minute; a correction mechanism of the current minute; a fast correction mechanism of the current time meshing directly with said internal toothing to allow correction of the time without changing the current minute.

The expression "rapid correction mechanism of the current time" designates a mechanism that makes it possible to change the time displayed from one position to the next without having to cycle to the minute display, and even without moving the minutes display.

By acting directly on the internal toothing of the hour ring, the proposed movement allows to rotate the ring directly, without acting through the train that drives the ring during the normal running of the watch.

The rapid correction of the current time can be done when the time setting rod is in a first axial position. The correction of the current minute can be done when a time setting rod is in a second axial position. The wearer of the watch can thus choose whether he wishes to correct the display of the minutes (for example in order to correct the running of the watch) or only that of the hours (for example during a change of time zone or passage to summer time).

The display mechanism of the current minute may include a retrograde mobile to drive a retrograde display element of the current minute.

During the normal running of the watch, the mobile retrograde can mesh with the internal toothing of the ring of hours during each return of the retrograde display element, so as to cause a jump of the hour. jumping. Thus, the jumps of the ring of hours at each change of time are triggered precisely when returning the retrograde minute indicator, so as to cause jumping of the jumping time.

The movement may comprise a disengageable gear between the retrograde mobile and the internal toothing, so as to avoid a movement of the retrograde indicator minutes during the correction of the time.

In one example, the retrograde mobile may comprise a retractable drive element which retracts during the advance of the retrograde display element, so as to cause said jumping display element only during the returns of the retrograde display element. retrograde mobile. The driving member retracts when advancing the retrograde mobile, and therefore does not drive the jumping display element during this advance.

The watch movement may be integrated or may comprise a complication or an additional module cooperating with an existing movement.

The drive member may cooperate with the internal toothing of the jumping hours ring to drive the jumping display element when the retrograde mobile rotates in a first direction corresponding to a return of the element of retrograde display, but not when the mobile retrograde rotates in a second direction opposite the first direction.

The drive member retracts when the retrograde mobile rotates in the opposite direction, that is to say when the retrograde display advances continuously between two rapid returns.

Thus, the retraction of the drive member prevents actuation of the jumping display when the retrograde mobile rotates in the opposite direction.

The drive member may comprise a retractable pin.

The drive member may comprise a retractable pin guided in the retrograde mobile.

The hour ring may comprise a toothing constituted by a plurality of teeth with asymmetrical flanks.

The toothing may be arranged to cooperate with the drive member so as to cause the retraction of the drive member when the retrograde mobile rotates in the second direction and puts the drive member in contact with a second side of a said tooth.

The toothing may be arranged to cooperate with the drive member so as to drive this drive member when the retrograde mobile rotating in the first direction puts the drive member in contact with a first sidewall. a said tooth.

The drive member may comprise a pin and an elastic element positioning the pin in the retracted position.

The retrograde mobile may comprise a wheel or a rake.

The retrograde mobile may comprise a wheel and an elastic element, for example a spiral spring, arranged to accumulate energy when the retrograde mobile rotates in the second direction and to restore energy when the retrograde mobile turns in the first sense.

BRIEF DESCRIPTION OF THE FIGURES [0041] Examples of implementation of the invention are indicated in the description illustrated by the appended figures in which:

Fig. 1 illustrates a front view of a watch movement constituting an exemplary mechanism according to the invention.

Fig. 2 illustrates a detail view of the retrograde mobile and a portion of the drive ring of the display element jumping in a first position of the retrograde mobile, for example to 0.

Fig. 3 illustrates a detail view of the retrograde mobile and a portion of the drive ring of the display element jumping in a second position of the retrograde mobile, for example at +10.

Fig. 4 illustrates a detail view of the retrograde mobile and a portion of the drive ring of the jumping display element upon returning to the initial position of the retrograde mobile, for example to +20.

Fig. 5A shows a front view of the watch movement during a first phase of the correction of the displayed time.

Fig. 5B shows a detailed view of the fast time correction mechanism displayed during the first phase of the correction of the displayed time.

Fig. 6A illustrates a front view of the watch movement during a second phase of the correction of the displayed time.

Fig. 6B illustrates a detailed view of the fast time correction mechanism displayed during the second phase of the correction of the displayed time.

Fig. 7A illustrates a front view of the watch movement during a third phase of the correction of the displayed time.

Fig. 7B illustrates a detail view of the rapid correction mechanism of the time displayed during the third phase of the correction of the displayed time.

Fig. 8A illustrates a front view of the watch movement during a first phase of the correction of the displayed minute.

Fig. 8B illustrates a detail view of the minute correction mechanism displayed during the first phase of the displayed minute correction.

Fig. 9A illustrates a front view of the watch movement during a second phase of the correction of the displayed minute.

Fig. 9B illustrates a detail view of the minute correction mechanism displayed during the second phase of the displayed minute correction.

Fig. 10A illustrates a front view of the watch movement during a third phase of the correction of the displayed minute.

Fig. 10B illustrates a detail view of the minute correction mechanism displayed during the third phase of the correction of the displayed minute.

Fig. 11A illustrates a front view of the watch movement during a fourth phase of the correction of the displayed minute.

Fig. 11B illustrates a detail view of the minute correction mechanism displayed during the fourth phase of the correction of the displayed minute.

Example (s) of Embodiment of the Invention [0042] FIG. 1 illustrates an example of a watch movement 1 constituting a mechanism according to the invention. It has an hour ring 70 as a jumping display element to display the current time in a not shown aperture, and a pointer 5 as a retrograde minute display element. A seconds hand 6 is provided in the center. The movement can be reassembled and set on time with the winding and setting rod 3.

In the illustrated embodiment, the minutes are displayed by the position of the retrograde hand 5 on a scale of minutes not shown. The minute scale covers an arc of less than 360 °, but greater than 180 °, for example 240 °. The window displaying the current time is next to the opening portion in the scale, at 6 o'clock in the example shown.

The retrograde needle 5 is mounted on the axis of the retrograde mobile 50 visible in particular in Figs. 2 to 4. This retrograde mobile is driven by the movement train so that the minute hand travels the scale in 60 minutes (or 60 minutes minus the return time).

The retrograde mobile 50 has an external toothing 500 on a portion of its periphery, in order to drive it with the teeth on a portion of the periphery of the intermediate retrograde minute forwarding 9. A pin 51 connected to this mobile acts as driving member for the jumping display. The pin is retractable in a guide 52, for example in a light in the mobile 51. A spring element 54, however, tends to push the pin 51 outwardly in the position shown in FIG. 2.

The time indications are carried by the hour ring 70. This ring is supported and driven by the drive ring 71 of smaller diameter. In a variant not shown, it is also possible to place the time indications directly on the ring 71, or on a ring of the same diameter.

The drive ring 71 has an internal toothing 710 with a plurality of teeth over the entire inner periphery. The spacing between the teeth is regular and there is no missing tooth. The teeth have two asymmetric flanks 7100 and 7101. The first flank 7100 is almost parallel to a diameter of the ring 71 and can drive the ring 71 by means of the pin 51. The second flank 7101 is inclined and forms a angle of less than 30 ° with the tangent of the ring 71; it tends to push the pin 51 in the guide 52 and therefore does not allow to drive the ring 71 with the pin.

A jumper 72 (FIG 5A) cooperates with an external toothing 711 of the drive ring 71 to position this ring and ensure a centering of the time indications in the window. This jumper comprises a jumper element 720 with a low friction element, for example a stone 722 in contact with the external toothing 711. The jumper spring 721 opposes the movement of the jumper and the ring 71. The toothing 711 has asymmetric teeth with steep sides 7110 which oppose the rotation of the movable 71 in the clockwise direction, and inclined flanks 7111 which allow this rotation by moving the jumper.

We will now describe using FIGS. 2 to 4 the operation of the mechanism during the running of the watch, that is to say when the needle retrograde minutes advances progressively from 0 to 60 minutes, then returns almost instantly in position.

FIG. 2 illustrates a detail of the mechanism just after the return of the minute hand, which indicates the minute 0. In this position, the retrograde wheel 50 driven by the teeth of the intermediate gear 9 rotates clockwise in the figure, to move the minute hand 5 clockwise along the scale. This rotation causes tensioning of the spiral spring 53. The drive member 51 (pin) is not in contact with the ring 71 which therefore remains stationary. The position of this ring is fixed by the jumper 72 cooperating with the teeth 711 on the outer periphery of the ring 71.

FIG. 3 corresponds to a position of the minute hand at about 10 minutes. The retrograde mobile 50 continues to rotate clockwise by arming the spiral spring 53. The drive member 51 (pin) comes into contact with an oblique flank 7101 of the internal toothing 710 of the ring 71. The pin is moves almost tangentially to the side 7101 so that the transmitted force is insufficient to rotate the ring 71 which is retained by the jumper 72 bearing against the steep sides 7110 of the external toothing 711. The pin 51 retracts in the guide therefore 52 through the retrograde mobile 50.

When the minute hand reaches 60 minutes, the last tooth of the toothing 500 of the retrograde mobile 50 is reached, so that the mobile can no longer continue its rotation in the clockwise direction. As at the same time the sector 90 without teeth intermediate reminder 9 is opposite the retrograde mobile 50, it is released. The spiral spring 53 disarms then suddenly and causes the almost instantaneous return of the mobile 50 and the retrograde needle 5 in its initial position, turning counterclockwise.

FIG. 4 illustrates the moment when the drive member 51 (pin) of the retrograde wheel 50 is in contact with a flank 7100 of the toothing 710 during the rapid return of the retrograde wheel 51. The pin 51 then causes the rotation of the ring 71 and the hour ring 70 in the counterclockwise direction, by raising the element 722 of the jumper 72 against the oblique flank 7111 of the external toothing 711.

We will now describe the rapid correction mechanism of the time, in relation with FIGS. 5A to 7B, then the mechanism for correcting the minutes and the time, in relation with FIGS. 8A to 11 B.

FIG. 5A illustrates a front view of a watch movement 1 during the rapid correction of the time displayed by the hour ring 70. This fast correction makes it possible to quickly change the current time 7, without affecting the position of the retrograde minute hand that continues to advance normally during this correction. The correction of the current time is obtained by pulling the winding and setting rod 3 in a first axial position P1, by means of the not shown crown. In another embodiment not illustrated, the time setting can be performed in successive increments on a push button.

The winding rod 3 in position P1 meshes by means of a sliding gear mechanism with the rocker control gear return 31, which causes the mobile correction of the current time 30 through the reference 31. In this position, the rotation of the rod 3 is transmitted to the mobile 30, the tooth 300 meshes with the side 7100 of the internal toothing 710 of the ring 71 driving the hour ring 70. The element 301 is a beam flexible correction mobile 30 allowing the retraction of the finger during the rotation of the correction mobile clockwise.

The rotation of the drive ring 71 and the hour ring 70 (FIG 6B) is against the force exerted by the jumper element 720 on the external toothing 711 of the 71. As can be seen in particular in FIG. 6A, the element 720 is lifted against the second flank 7111 of this toothing when the ring is rotated clockwise, then descends rapidly (FIG 7A) under the impulse of the jumper spring 720 against the first flank 7110 of the toothing 711, so as to precisely position the ring 70.

As seen in Figs. 5A, 6A and 7A, the fast time correction is transmitted directly to the ring 71 and the hour ring 70 and thus performed without affecting the position indicated by the retrograde minute hand 5, which continues to to advance normally while being driven by the cog of the movement during this correction.

We will now describe in relation to FIGS. 8A to 11B the correction mechanism of the minutes of the current time. As will be seen, this mechanism also makes it possible to correct the time displayed by means of the hour ring 70, which progresses by jumping during the returns of the retrograde hand 5 during the correction as well.

The correction of the current minute is obtained by pulling the winding and setting rod 3 in a second axial position P2, by means of the not shown crown. The winding rod 3 in position P2 meshes by means of a sliding gear mechanism with the rocking control pinion 31, which drives the mobile for correcting the current time through the gearbox 31. In this position, the rotation of the rod 3 is transmitted to the mobile 33 coaxial with the mobile 30.

The mobile 33 is mounted with friction on its axis; this avoids the breakage of the toothed wheels in the event of a blockage, for example in the event of rotation of the needle from below of 0 minutes. It is provided with teeth 330, here three 330, to mesh with the wolf wheel wheel 34. The drive can be carried out in both directions for bidirectional correction. A larger number of teeth, for example four teeth, can be provided for faster adjustment. The wolf-toothed mobile 34 is coaxial and integral with the wheel 35, which in turn causes the minute correction return 36 and then the friction wheel 37 whose toothing causes the retrograde minute intermediate return 9.

The friction wheel 37 is a mechanism for preventing the stopping of the basic movement during the correction.

As seen in Figs. 8 to 11 A, the correction of the minutes is done without modifying the position of the mobile 30 or that of the indicator jumping hours 7, except when the retrograde needle 5 returns to the initial position (Figs 10A and 10B); at this moment, the mobile 50 is released and returns to its initial position by driving the internal toothing of the ring 71 through the retractable pin 51, in the same way as during the normal running of the watch.

The correction mechanism thus described thus allows a unidirectional correction of the hour and bidirectional correction of the minutes (except at the minute 0, which does not allow to go directly to the minute 59).

Reference numbers used in figures [0065] 1 Watch movement 3 Winding and time-setting spindle 30 Mobile time correction 300 Front edge of mobile 30 301 Return spring of mobile 30 31 Return of pinion Tilt control 32 Cross reference 33 Mobile minute correction 330 Mobile tines 33 34 Wolf tooth wheel mobile 35 Wheel 36 Minute correction return 37 Friction wheel 5 Retrograde display element 50 Retrograde mobile 500 Denture of the wheel mobile 50 51 Drive unit (retractable pin) 52 Drive unit guide 53 Elastic element, eg spiral spring 54 Spring element 6 Second hand 7 Jumping display element 70 Ring of hours 71 Ring of driving the jumping display element 710 Internal tooth of the drive ring 71 7100 First flank of the toothing 710 7101 Second flank of the toothing 710 711 External tooth of the ring 71 71 7110 First flank of the toothing 711 7111 Second flank of the toothing 711 72 Ring locating collar 71 720 Jumping element 72 722 Low friction element mounted on the jumper 72 9 Retrograde minute intermediate link 90 Portion of the periphery of intermediate return 9 which is toothless

Claims (8)

claims A watch movement (1) comprising: - an hour ring (70) for displaying the current time jumpingly, said hour ring having an internal toothing (710); a display mechanism of the current minute (5, 50); - a correction mechanism of the current minute (33-37, 9); characterized by a current time fast correction mechanism (30) in direct contact with said internal toothing (710) to enable correction of the current time without changing the current minute. 2. Movement according to claim 1, the correction mechanism of the current minute being actuated when a time setting rod (3) is in a second axial position (P2), the rapid correction mechanism of the current time being actuated when the time setting rod (3) is in a first axial position (P1). 3. Movement according to one of claims 1 or 2, said display mechanism of the current minute comprising a retrograde mobile (50) for driving a retrograde display element (5) of the current minute. 4. Movement according to claim 3, said retrograde mobile (50) being arranged to mesh with said internal toothing (710) during the returns of the retrograde display element (5), so as to cause a jump of the hour jumping. 5. Movement according to claim 4, the correction mechanism of the current minute (33-37, 9) driving the ring of hours (70) during the returns of the retrograde display element, so as to cause a jump of the jumping hour. 6. Movement according to one of claims 4 and 5, comprising a disengageable gear between said retrograde mobile and said internal toothing. 7. Movement according to one of claims 4 to 6, comprising a drive member (51) retractable so as to drive said jumping display element (7) when the retrograde mobile (50) rotates in a first direction corresponding to a return of the retrograde display element (5), but not when the retrograde mobile (50) rotates in a second direction opposite to the first direction. 8. Mechanism according to claim 7, said retractable drive member (51) comprising a pin and a resilient member positioning said pin in non-retracted position.