CH714744A2 - Retrograde watchmaking mechanism. - Google Patents

Abstract

The invention relates to a clock display mechanism, comprising a first retrograde drive means (10) of a first display of a first magnitude, and a second retrograde drive means (20) of a second display of a second size, the first retrograde drive means (10) comprising a first drive rake (12) for exerting on a first driving mobile of the first display a force opposed to a resistant force exerted by a first return rake (17), the second retrograde drive means (20) comprising a second drive rake (26) for exerting on a second driving mobile of the second display a force opposite to a resistant force exerted by a second return rake (29), where the pivot axes of the first drive rake (12) and the first return rake (17) are distant, and / or the pivot axes of the second me drive rack (26) and the second return rake (29) are remote.

Description

D3 31

CH 714 744 A2

Description

FIELD OF THE INVENTION The invention relates to a clock display mechanism, comprising at least a first retrograde drive means of a first display of a first size, and a second retrograde drive means a second display of a second size, said first retrograde drive means comprising a first drive rake arranged to exert, directly or indirectly, on a first drive mobile of said first display an effort opposite to a resistant effort exerted by a first return rake, and said second retrograde drive means comprising a second drive rake arranged to exert, directly or indirectly, on a second driving mobile of said second display, a force opposed to a resistant force exerted with a second reminder rake.

The invention also relates to a timepiece movement comprising such a display mechanism.

The invention also relates to a timepiece, in particular a watch, comprising such a clockwork movement, and / or such a display mechanism.

The invention relates to the field of retrograde clockwork display mechanisms, in particular for watches.

Background of the invention [0005] The retrograde display is a prized complication in watchmaking, and which makes it possible to distribute, on a dial, a plurality of distinct displays, each remaining clearly legible.

However, the retrograde display mechanisms each occupy a large volume in the case of a watch, and it is not always possible to house them correctly to offer the user a display with a logical juxtaposition of the different quantities displayed.

Summary of the invention [0007] The invention proposes to develop a combination between several retrograde displays, which is easily adaptable to the volumes still available in a watch case, and requiring the smallest possible thickness, while calling upon common components and moderate cost.

To this end, the invention relates to a clockwork display mechanism according to claim 1.

The invention also relates to a timepiece movement comprising such a display mechanism.

The invention also relates to a timepiece, in particular a watch, comprising such a clockwork movement, and / or such a display mechanism.

Brief description of the drawings [0011] Other characteristics and advantages of the invention will appear on reading the detailed description which follows, with reference to the accompanying drawings, where:

fig. 1 shows, schematically, and in plan, a retrograde display mechanism according to the invention, in a particular application to a first mechanism for displaying the trailing and retrograde minutes, and to a second display for the jumping and retrograde hours;

fig. 2 shows the mechanism of FIG. 1, schematically, and in partial section in the vicinity of the different pivot axes of FIG. 1, fig. 3 shows, schematically, and in plan, a first variant of a watch according to the invention;

fig. 4 shows, schematically, and in plan, a second variant of a watch according to the invention;

fig. 5 is a block diagram representing a watch, comprising such a clockwork movement causing such a display mechanism.

Detailed description of the preferred embodiments The invention relates to a clockwork display mechanism 100, for a timepiece 1000, and more particularly for a watch.

This display mechanism 100 comprises at least a first retrograde drive means 10 of a first display 11 of a first size, and a second retrograde drive means 20 of a second display 21 of a second magnitude.

CH 714 744 A2 The invention is illustrated in the figures for a nonlimiting variant where the first quantity is the minute, and where the second quantity is the hour.

The first retrograde drive means 10 comprises a first drive rake 12, which is arranged to exert, directly or indirectly, on a first mobile 16 for driving the first display 11, a force opposite to a resistant force exercised by a first return rake 17.

And the second retrograde drive means 20 comprises a second drive rake 26, which is arranged to exert, directly or indirectly, on a second mobile 210 for driving the second display 21, an effort opposite to an effort resistant exerted by a second return rake 29.

In particular, and as shown in the figures, the first mobile 16 and the second mobile 210 are coaxial along a pivot axis DO. More particularly still, the first mobile 16 and the second mobile 210 are coaxial with a carriageway which comprises a clockwork movement 500, arranged to drive the display mechanism 100, or in which this display mechanism 100 is incorporated, according to this same pivot axis DO [0018] According to the invention, the pivot axis of the first drive rake 12 is distant from the pivot axis of the first return rake 17 and / or the pivot axis of the second drive rake 26 is spaced from the pivot axis of the second return rake 29.

In the variant illustrated in the figures, the pivot axis D1 of the first drive rake 12 of the minutes is distant from the pivot axis D6 of the first return rake 17 of the minutes, and the pivot axis of the second drive rake 26 of the hours coincides with the pivot axis D2 of the second reminder rake 29 of the hours.

More particularly, and as visible in FIGS. 1 and 2, the first drive rake 12 is arranged to exert indirectly on the first mobile 16, through a first reversing gear 15, of pivot axis D5, meshing with the first mobile 16, a force opposite to a resistant force exerted directly on the first mobile 16 by the first return rake 17.

In the variant illustrated in the figures, the second drive rake 26 is arranged to exert directly on the second mobile 210 for driving the second display 21, a force opposite to a resistant force exerted by the second return rake 29.

In another variant not shown, the first drive rake 12 is arranged to exert directly on the first mobile 16 a force opposite to a resistant force exerted indirectly on the first mobile 16, through a first reversing gear of return meshing with the first mobile 16, by the first return rake 17.

In yet another variant not shown, the second drive rake 26 is arranged to exert indirectly on the second mobile 210, through a second reversing gear meshing with the second mobile 210, an effort opposite to an effort resistant exerted directly on the second mobile 210 by the second return rake 29.

In yet another variant not shown, the second drive rake 26 is arranged to exert directly on the second mobile 210 a force opposed to a resistant force exerted indirectly on the second mobile 210, through a second return return reverser meshing with the second mobile 210, by the second return rake 29.

In this illustrated variant, the pivot axis D1 of the first drive rake 12 is distant from the pivot axis D6 of the first return rake 17, and the pivot axis of the first mobile 16 is located between the pivot axis D1 of the first drive rake 12 and the pivot axis D6 of the first return rake 17.

More particularly still, the first drive rake 12 is arranged to exert indirectly on the first mobile 16, through the first reversing gear 15 meshing with the first mobile 16, a force opposite to a resistant force exerted directly on the first mobile 16 by the first return rake 17, and the pivot axis D5 of the first reversing gear 15 is located between the pivot axis D1 of the first drive rake 12 and the pivot axis D6 of the first rake of reminder 17.

In another variant not shown, the pivot axis of the second drive rake 26 is distant from the pivot axis of the second return rake 29, and the pivot axis of the second mobile 210 is located between the pivot axis of the second drive rake 26 and the pivot axis of the second return rake 29.

In yet another variant not shown, the second drive rake 26 is arranged to exert indirectly on the second mobile 210, through a second reversing gear meshing with the second mobile 210, an effort opposite to an effort resistant exerted directly on the second mobile 210 by the second return rake 29, and the pivot axis of the second reversing gear is located between the pivot axis of the second drive rake 26 and the pivot axis of the second rake reminder 29.

More particularly, and in the nonlimiting variant illustrated by the figures, the first retrograde drive means 10 is arranged to control a trailing and retrograde movement of the first display 11,

CH 714 744 A2 and the second retrograde drive means 20 is arranged to control a jumping and retrograde movement of the second display 12.

More particularly, the first retrograde drive means 10 comprises a first cam 34, which comprises a first ramp 35, which is arranged to drive a first feeler 14 which comprises the first drive rake 12 in a working stroke in a first drive direction of the first display 11. This first feeler 14 is here the end of an arm substantially perpendicular to the general direction in which the first drive rake 12 extends, in its middle.

This first cam 34 has, on the largest diameter of the first ramp 35, a threshold 36, which is followed by a release 37 of disengagement of the first drive rake 12, and which is arranged to allow the return of the first feeler 14 on the smallest diameter of the ramp 35 under the action of a return torque exerted indirectly on the first drive rake 12 by the first return rake 17 during a vacuum return stroke of the first reminder rake 17. In the variant of FIG. 1, the first cam 34 is a snail cam.

In this variant of the figures, the first retrograde drive means 10 is arranged to drive the second retrograde drive means 20 by means of a ratchet. This pawl carries a driving finger 19, which is arranged to drive an input mobile 22, of pivot axis D7, and which comprises the second retrograde drive means 20, during the empty return stroke.

More particularly, the first cam 34 is driven from a mobile motor 30, which is arranged to be driven by a movement 500, or that includes a movement 500, and in particular by means of a gear train. More particularly, the train comprises at least one friction link arranged to allow adjustment of the position of the first display 11. Naturally, a similar friction link can be inserted elsewhere, in the drive train of the first display 11, and / or of the second display 21, or of any other display that includes the display mechanism 100.

The train comprises, in the variant of the figures, from the motor mobile 30, a friction wheel 31 and a friction mobile 32, the wheel 31 meshes with a pinion 33, of pivot axis D4, carrying the first cam 34.

In particular, as shown in FIG. 1, the first return rake 17 carries the driving finger 19, which is pivotable and is subjected to the torque of a return spring 43 fixed on the first return rake 17, and which is supported on a boss 44 or the like. This driving finger 19 is arranged to drive a star which comprises the input mobile 22, and which is arranged to rotate a second cam 23 which comprises the second retrograde drive means 20.

More particularly, the second cam 23 has a second ramp, which is arranged to drive a second probe 27, which includes the second drive rake 26, in a working stroke in a first drive direction of the second display 12. This second probe 27 is here the end of an arm inclined about 60 ° with the general direction of the second drive rake 26, in the middle.

This second cam 23 has, on the largest diameter of the second ramp, a threshold 24 followed by a clearance 25 for disengaging the second drive rake 26, and which is arranged to allow the return of the second probe 27 on the smallest diameter of the ramp 35 under the action of a return torque exerted indirectly on the first drive rake 12 by the first return rake 17 during an empty return stroke of the first return rake 17.

In sum, the driving finger 19 is engaged with the input mobile 22 during the empty return stroke, and disengaged from this input mobile 22 during the working stroke.

In a variant, as visible in FIG. 1, the second cam 23 is a snail cam, the second ramp of which is smooth.

In another variant not shown, the second ramp of the second cam 23 is a stepped cam comprising a stage for each unit of the second quantity.

More particularly, the first return rake 17 is permanently subjected to the return torque exerted by a first jumper spring 41, for example bearing on a boss or a first pin 42; and the second return rake 29 is more particularly permanently subjected to the return torque exerted by a second jumper spring 47, bearing on a second pin 48, or the like.

In a variant not illustrated, both the pivot axis of the first drive rake 12 is distant from the pivot axis of the first return rake 17, and the pivot axis of the second rake of drive 26 is spaced from the pivot axis of the second return rake 29.

The illustrated non-limiting variant relates to the case where the first display 11 is a minutes display, and the second display 21 is a hours display.

In another variant not shown, the first display 11 is a time display, and the second display 21 is an AM / PM or day / night or date display.

CH 714 744 A2 In yet another variant not illustrated, the first display 11 is an AM / PM or day / night or calendar display, and the second display 21 is a display of a month or a lunar month.

In yet another variant not illustrated, the first display 11 is a month or lunar month display, and the second display 21 is a year display.

More particularly, the display mechanism 100 includes a date display, which includes a friction gear, with a friction wheel 31 and a friction wheel 32, along the axis D3, and which friction gear is incorporated in the gear train between the mobile motor 30 and the first cam 34.

In this particular example, the information is taken from the roadway of the movement, the friction of the date is used as a reference to the pinion 33 of the first cam mobile 34. This first cam 34 rotates 360 ° and drives the first probe 14 of the first drive rake 12 over a stroke here of approximately 25 °. This angle, reported in the center of the display on the pivot axis DO by the toothing 13 of the first drive rake 12, in combination with the first gear 15 and the first mobile 16, displays the minutes on an angular amplitude of 140 °, as shown in fig. 3. Its reminder is done with the first reminder rake 17, the display of the minute is thus trailing and retrograde. The first reminder rake 17 arms with the minute drive, its on-board pawl clicks on the retrograde hour star 22 when it is loaded, without training it. After a period of 60 minutes, the fall of the first return rake 17 causes its on-board pawl, the driving finger 19 of which strikes the star 22, and applies its rotation to it. A jumper 46 combined with a jumper spring 45 allows the star 22 to be held in position after its rotation. During each jump, the star 22, which here has twelve teeth, turns 1/12 of a turn. The second drive rake 26, coaxial with the second return rake 29 along the pivot axis D2, takes the information on the second cam 23, pivotally attached to the hour star 22, by its second probe 27 , and precisely displays each hour on a 140 ° display. The time display is jumping and downshifting.

Claims (22)

The invention also relates to a timepiece movement 500 comprising at least one such display mechanism 100. More particularly, this movement 500 comprises an input mobile 30, which is arranged to drive the first drive means retrograde 10. The invention also relates to a timepiece, in particular a watch 1000, comprising such a movement 500, and / or at least one such display mechanism 100. More particularly, the clockwork movement 500 is designed to drive an input mobile 30 of the display mechanism 100. claims 1. Clockwork display mechanism (100), comprising at least a first retrograde drive means (10) of a first display (11) of a first size, and a second retrograde drive means (20 ) a second display (21) of a second size, said first retrograde drive means (10) comprising a first drive rake (12) arranged to exert, directly or indirectly, on a first mobile (16) drive of said first display (11) a force opposed to a resistant force exerted by a first return rake (17), and said second retrograde drive means (20) comprising a second drive rake (26) arranged to exert, directly or indirectly, on a second mobile (210) for driving said second display (21) a force opposite to a resistant force exerted by a second return rake (29), characterized in that the pivot axis nt of said first drive rake (12) is distant from the pivot axis of said first return rake (17) and / or the pivot axis of said second drive rake (26) is distant from the axis of pivoting of said second return rake (29). 2. Clock display mechanism (100) according to claim 1, characterized in that said first drive rake (12) is arranged to exert indirectly on said first mobile (16), through a first return reverser (15) meshing with said first mobile (16), a force opposite to a resistant force exerted directly on said first mobile (16) by said first return rake (17), or in that said first drive rake (12) is arranged to exert directly on said first mobile (16) a force opposite to a resistant force exerted indirectly on said first mobile (16), through a first reversing return return meshing with said first mobile (16) , by said first reminder rake (17). 3. Clock display mechanism (100) according to claim 1 or 2, characterized in that said second drive rake (26) is arranged to exert indirectly on said second mobile (210), through a second reversing gear meshing with said second mobile (210), a force opposite to a resistant force exerted directly on said second mobile (210) by said second return rake (29), or in that said second drive rake ( 26) is arranged to exert directly on said second mobile (210) a force opposed to a resistant force exerted indirectly on said second mobile (210), through a second reversing return return meshing with said second mobile (210), by said second reminder rake (29). 4. Clock display mechanism (100) according to one of claims 1 to 3, characterized in that the pivot axis (D1) of said first drive rake (12) is distant from the axis of pivoting (D6) of said first rake of CH 714 744 A2 reminder (17), and in that the pivot axis of said first mobile (16) is located between the pivot axis (D1) of said first drive rake (12) and the pivot axis (D6) of said first reminder rake (17). 5. clockwork display mechanism (100) according to claim 4, characterized in that said first drive rake (12) is arranged to exert indirectly on said first mobile (16), through a first return reverser (15) meshing with said first mobile (16), a force opposite to a resistant force exerted directly on said first mobile (16) by said first return rake (17), and in that the pivot axis (D5 ) of said first reversing gear (15) is located between the pivot axis (D1) of said first drive rake (12) and the pivot axis (D6) of said first return rake (17). 6. Clock display mechanism (100) according to one of claims 1 to 5, characterized in that the pivot axis of said second drive rake (26) is distant from the pivot axis of said second return rake (29), and in that the pivot axis of said second mobile (210) is located between the pivot axis of said second drive rake (26) and the pivot axis of said second return rake (29). 7. Clock display mechanism (100) according to claim 6, characterized in that said second drive rake (26) is arranged to exert indirectly on said second mobile (210), through a second return reverser meshing with said second mobile (210), a force opposite to a resistant force exerted directly on said second mobile (210) by said second return rake (29), and in that the pivot axis of said second reversing gear is located between the pivot axis of said second drive rake (26) and the pivot axis of said second return rake (29). 8. Clock display mechanism (100) according to one of claims 1 to 7, characterized in that said first retrograde drive means (10) is arranged to control a trailing and retrograde movement of said first display (11 ), and in that said second retrograde drive means (20) is arranged to control a jumping and retrograde movement of said second display (12). 9. Clock display mechanism (100) according to one of claims i to 8, characterized in that said first retrograde drive means (10) comprises a first cam (34) comprising a first ramp (35) arranged to drive a first probe (14) which comprises said first drive rake (12) in a working stroke in a first drive direction of said first display (11), and which comprises, on the largest diameter of said first ramp (35), a threshold (36) followed by a clearance (37) for disengaging said first drive rake (12) arranged to authorize the return of said first probe (14) to the smallest diameter of said ramp ( 35) under the action of a return torque exerted indirectly on said first drive rake (12) by said first return rake (17) during a vacuum return stroke of said first return rake (17) , and in that said first means of entra retrograde element (10) is arranged to drive said second retrograde drive means (20) by means of a pawl carrying a driving finger (19) arranged to drive an input mobile (22) which comprises said second means d retrograde drive (20) during said empty return stroke. 10. Clock display mechanism (100) according to claim 9, characterized in that said first cam (34) is driven from a mobile motor (30) arranged to be driven by a movement (500) or that includes a movement (500). 11. Clock display mechanism (100) according to claim 10, characterized in that said first cam (34) is driven from said motor mobile (30) by means of a gear train, which comprises at least one friction link arranged to allow adjustment of the position of said first display (11). 12. Clock display mechanism (100) according to one of claims 9 to 11, characterized in that said first return rake (17) carries said driving finger (19) which is pivotable and subjected to the torque of a return spring (43) fixed on said first return rake (17), and which driving finger (19) is arranged to drive a star which comprises said input mobile (22) and which is arranged to rotate a second cam (23) which comprises said second retrograde drive means (20). 13. Clock display mechanism (100) according to one of claims 9 to 12, characterized in that said second cam (23) comprises a second ramp arranged to drive a second feeler (27) which comprises said second rake drive (26) in a working stroke in a first drive direction of said second display (12), and which comprises, on the largest diameter of said second ramp, a threshold (24) followed by a clearance ( 25) for disengaging said second drive rake (26) arranged to authorize the return of said second feeler (27) to the smallest diameter of said ramp (35) under the action of a return torque exerted indirectly on said first drive rake (12) by said first return rake (17) during an empty return stroke of said first return rake (17), and in that said first retrograde drive means (10) is arranged to train said d second retrograde drive means (20) by means of said driving finger (19) which is engaged with said input mobile (22) during said idle return stroke, and which is released from said input mobile (22 ) during said working race. 14. Clock display mechanism (100) according to claim 13, characterized in that said second cam (23) is a snail cam whose said second ramp is smooth. CH 714 744 A2 15. clockwork display mechanism (100) according to claim 13, characterized in that said second ramp of said second cam (23) is a stepped cam comprising a stage for each unit of said second quantity. 16. Clock display mechanism (100) according to one of claims 1 to 15, characterized in that said first return rake (17) is permanently subjected to the return torque exerted by a first jumper spring ( 41), and in that said second return rake (29) is permanently subjected to the return torque exerted by a second jumper spring (47). 17. Clock display mechanism (100) according to one of claims 1 to 16, characterized in that both the pivot axis of said first drive rake (12) is distant from the axis pivoting of said first return rake (17), and the pivot axis of said second drive rake (26) is distant from the pivot axis of said second return rake (29). 18. clockwork display mechanism (100) according to one of claims 1 to 17, characterized in that said first display (11) is a minute display, and said second display (21) is a display of hours. 19. Clock display mechanism (100) according to one of claims 1 to 17, characterized in that said first display (11) is an hour display, and said second display (21) is an AM display / PM or day / night or calendar. 20. Clockwork display mechanism (100) according to one of claims 1 to 17, characterized in that said first display (11) is an AM / PM or day / night or date display, and said second display (21) is a month or lunar month display. 21. Clock display mechanism (100) according to one of claims 1 to 17, characterized in that said first display (11) is a month or lunar month display, and said second display (21) is a year display. 22. Clock display mechanism (100) according to claim 10 and one of claims 1 to 21, characterized in that said display mechanism (100) comprises a date display comprising a friction reference which is incorporated in said train between said motor mobile (30) and said first cam (34).