EP2891017A1 - Display mechanism, for timepiece - Google Patents
Display mechanism, for timepieceInfo
- Publication number
- EP2891017A1 EP2891017A1 EP13722060.4A EP13722060A EP2891017A1 EP 2891017 A1 EP2891017 A1 EP 2891017A1 EP 13722060 A EP13722060 A EP 13722060A EP 2891017 A1 EP2891017 A1 EP 2891017A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- lever
- cam
- disc
- pivot
- rocker
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
- G04B19/00—Indicating the time by visual means
- G04B19/24—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars
- G04B19/243—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator
- G04B19/247—Clocks or watches with date or week-day indicators, i.e. calendar clocks or watches; Clockwork calendars characterised by the shape of the date indicator disc-shaped
- G04B19/253—Driving or releasing mechanisms
- G04B19/25333—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement
- G04B19/25373—Driving or releasing mechanisms wherein the date indicators are driven or released mechanically by a clockwork movement driven or released stepwise by an energy source which is released at determined moments by the clockwork movement
Definitions
- the present invention relates to a display mechanism for a timepiece, including a display mechanism of the day of the week and the date.
- Patent documents FR 2174730, US 3911667 and DE 2060056 disclose day and date display mechanisms in which the date is displayed by means of an annular disk coaxial with the timepiece box and the day of the week is displayed by means of a full indicator disc, these two discs rotating opposite a wicket.
- the indicator disc of the day is integral with a star with seven or fourteen teeth that is operated once a day.
- a disadvantage of this type of display is that, if it is desired to display the day of the week in large and / or in full, the indicator disc of the day must, like that of the date, be coaxial with the movement of the workpiece. and having a large diameter so that it is no longer possible to pass off-center needles axes such as chronograph or small seconds chronograph hand pins.
- the number of displays and complications that may include the timepiece is limited.
- the angular amplitude of each rotation step of the disc of the days is limited.
- the internal toothing of the disc of the days must therefore have a sufficient number of teeth, in this case fourteen, which forces the disc of the days to carry several series of inscriptions "Monday” to "Sunday".
- the discs of the days and the calendars are not coaxial limits the diameter that can have the disc of the days, therefore the surface available for the inscriptions.
- the discs of the days and calendars are coaxial and each comprise an internal toothing, of respectively 21 teeth and 31 teeth.
- the present invention aims at remedying the aforementioned drawbacks, at least partially, and proposes for this purpose a display mechanism for a timepiece, comprising:
- a first annular indicator disc comprising a first internal toothing
- a second annular indicator disc coaxial with the first annular indicator disk and comprising a second internal toothing, a first cam
- a first rocker pivotally mounted around a first pivot and arranged to be controlled by the first cam
- first lever pivotally mounted about a second pivot independent of the rotations of the first rocker around the first pivot and distinct from the first pivot, the first lever being arranged to be controlled by the first rocker and comprising a first actuating part arranged to cooperate with the first internal toothing to actuate the first annular indicator disk, and a second lever pivotally mounted around a third pivot independent of the rotations of the first rocker around the first pivot and distinct from the first and second pivots, the second lever being arranged to be controlled by the first rocker and comprising a second actuating portion; arranged to cooperate with the second internal toothing to actuate the second annular indicator disc.
- the present invention thus uses two coaxial annular indicator discs to display two different quantities, typically the day and the date.
- the central opening of each disc allows the passage of off-center needle axes.
- the use of the first and second levers mounted around pivots independent of the rotation of the first rocker allows a significant increase in the angular amplitude of each rotation step of the indicator discs since this amplitude no longer depends solely on the shape of the cam but also the position of the pivots of the rocker and the levers, positions which can be easily chosen to obtain the desired amplitude.
- the quantities indicated by at least one of the indicator discs can therefore be displayed in a large size.
- the first cam is arranged so that the first and second annular indicator discs move in instantaneous jumps.
- the display mechanism may further comprise a second cam and a second pivotally mounted rocker about a fourth pivot distinct from the first to third pivots and arranged to be controlled by the second cam, the second rocker carrying the first to third pivots of so that during operation of the mechanism the first actuating part cyclically describes a closed curve, each cycle comprising a first movement during which the first actuating portion exits the first internal toothing without touching the latter and a second movement during which the first actuating part enters the first gear interior for moving the first annular indicator disc, and so that during the operation of the mechanism the second actuating part also cyclically describes a closed curve, each cycle comprising a first movement during which the second actuating portion exits the second internal toothing without touching the latter and a second movement during which the second actuating portion enters the second internal toothing to move the second annular indicator disc.
- first actuating portion may be rigidly connected to the remainder of the first lever and the second actuating portion may be rigidly connected to the remainder of the second lever.
- the display mechanism may further comprise a third pivotally mounted rocker about a fifth pivot distinct from the first to fourth pivots and arranged so that the first rocker is controlled by the first cam via the third rocker.
- first and second cams are coaxial.
- the present invention also proposes a timepiece comprising a display mechanism as defined above and in which the annular indicator discs are centered around the axis of the timepiece.
- Figures 1 to 3 show three successive configurations of a display mechanism according to a first embodiment of the invention.
- a display mechanism according to a first embodiment of the invention for a timepiece such as a wristwatch, comprises two indicator discs 1, 2 that are coaxial and centered around the axis of the timepiece box.
- the disc 1 is a disc indicator days of the week, while the disc 2 is a date indicator disc.
- the discs 1, 2 are annular and each comprise an internal toothing 3, 4, respectively of 7 teeth and 31 teeth.
- the date indicator disc 2 covers an inner part of the indicator disc of the days 1 and bears the date numbers 1 to 31.
- An outer portion of the indicator disc of the days 1 not covered by the date indicator disc 2 bears the names of the days of the week.
- Counters (not shown) are formed in the dial of the timepiece to reveal the day of the current week and the current calendar, respectively.
- the angular position of the discs 1, 2 is indexed by jumpers 5, 6.
- a calendar wheel 7 is driven continuously in rotation in the direction indicated by the arrow 8 by the movement of the timepiece at a rate of one turn per 24 hours.
- a calendar cam 9 is coaxial with the calendar wheel 7.
- a pin 10 driven into the calendar cam 9 is engaged in an oblong opening in an arc 11 formed in the calendar wheel 7 so as to define a range of mobility angular between the calendar wheel 7 and the calendar cam 9.
- the calendar cam 9 is instantaneous jump. Its periphery comprises an armoring part 12 of increasing radius between a lower part 13 and a top 14 and a shorter part of falling 15, between the top 14 and the lower part 13.
- the lower part 13 has a hollow shape .
- An actuating lever 16 pivoting about a pivot 17 has a spout 18 which is kept in contact with the calendar cam 9 by a return spring 19 acting on the actuating lever 16.
- the actuating lever 16 carries a pin 20 which cooperates with an oblong opening 21 of a lever 22 days mounted pivoting about a pivot 23, and a rake 24 which cooperates with a corresponding rake 25 of a date lever 26 pivotally mounted about a pivot 27.
- Each lever 22, 26 carries a pawl 28, 29 articulated around a pivot 30, 31 and subjected to the action of a return spring 32, 33.
- each pawl 28, 29 carries an actuating portion in the form for example of a pin 34 , Arranged to cooperate with the internal toothing 3, 4 of the indicator disk of the days 1, respectively of the date indicator disc 2.
- the pivots 17, 23 and 27 are separate and mounted on a fixed part of the mechanism or movement, for example on the stage of the movement.
- the pivots 23 and 27 of the levers 22 and 26 are thus independent of the rotations of the rocker 16 around the pivot 17. In other words, the pivots 23 and 27 are not carried by the rocker 16.
- FIG. 1 shows the configuration of the right mechanism after midnight.
- the calendar cam 9 is immobilized by the spout 18 of the actuating lever 16 which is engaged in the lower part 13 of the periphery of the calendar cam 9, while the calendar wheel 7 rotates in the direction 8, and each of the pins 34, 35 is in a space between two consecutive teeth of the internal toothing 3, 4 respectively.
- one end 36 of the oblong opening 11 of the calendar wheel 11 comes into contact with the pin 10 carried by the calendar cam 9, thus making the calendar cam 9 integral with the calendar wheel 7 in sense 8.
- the timing cam 9 starts to rotate in the direction 8 which arms the actuating lever 16 against the action of its return spring 19 and out each of the pins 34, 35 of the between -dent in which it was to direct it to the adjacent entre- ent in the opposite direction of rotation of indicator disc 1, 2 (see Figure 2).
- the spout 18 of the actuating lever 16 arrives at the top 14 of the periphery of the cam 9 (and FIG. 3) and each of the pins 34, 35 is located in said adjacent interstice and is held there by the action of the spring 32, 33.
- the spout 18 slides along the part of falling 15 which causes the actuating lever 16 to fall and the calendar cam 9 is rotated in the direction 8 by moving the pin 10 away from the end 36 of the oblong opening 11.
- the levers of the days and of dates 22, 26 and their pivot abruptly pawls 28, 29 with their pins 34, 35 push the respective teeth of the toothings 3, 4 thereby advancing the indicator disks 1, 2 respectively i / 7 th and 1/31 th round turn to display the next day and the next date.
- the indicator discs 1, 2 are then held motionless by their jumpers 5, 6 for 24 hours until their next actuation.
- the large amplitude jump indicator disc on days 1, namely l / 7th turn is made possible by the use of leverage days 22 which, by acting on the lever arms, to make a large displacement to the pin 34 by printing a smaller displacement to the portion (the opening 21) which cooperates with the actuating lever 16.
- leverage days 22 which, by acting on the lever arms, to make a large displacement to the pin 34 by printing a smaller displacement to the portion (the opening 21) which cooperates with the actuating lever 16.
- the distance between the pivot 23 and the portion (opening 21) of the lever 22 which cooperates with the operating lever 16 is less, or even much lower, the distance between the pivot 17 and the portion (pin 20) of the actuating lever 16 which cooperates with the lever 22 days, it increases the range of angular displacement of the lever 22 relative to that of the actuating lever 16. Thanks to the annular shape of the indicator discs 1, 2, they can be crossed in their opening this ntral by off-center needles such as chronograph counter hands or a small second hand.
- a display mechanism comprises annular indicator discs 1, 2 identical to those of the first embodiment, for displaying the day of the week and the date, respectively, a calendar wheel 7 and a calendar cam 9 identical to those of the first embodiment and linked together, as in the first embodiment, by a pin 10 carried by the calendar cam 9 and engaged in a oblong opening in an arc 11 of the calendar wheel 7.
- An actuating lever 16 'fulfilling the same function as the actuating lever 16 of the first embodiment is controlled by the calendar cam 9 via an intermediate lever 40 and itself controls a lever 22 'days and a date lever 26'.
- the intermediate lever 40 pivots around a pivot 41 mounted on a fixed part of the mechanism or movement, for example on the movement stage, and comprises a spout 42 which is held in contact against the calendar cam 9 by a spring of recall 43 acting on the intermediate lever 40.
- the intermediate lever 40 carries a pin 44 engaged in an oblong opening 45 of the actuating lever 16'.
- the actuating lever 16 ' carries a pin 20' engaged in an oblong opening 21 'of the lever 22' days and comprises a rake 24 'cooperating with a corresponding rake 25' of the date lever 26.
- the levers 22 ', 26' each comprise an actuating portion in the form of a pin 34 ', 35' intended to cooperate with the internal toothing 3, 4 of the indicator disc 1, 2 respectively.
- each pin 34 ', 35' is not carried by a pawl but is rigidly connected to the rest of the lever 22 ', 26', for example driven into it or in one piece with this one.
- the mechanism according to this second embodiment of the invention further comprises an isolation cam 46 coaxial with the calendar cam 9 and the calendar wheel 7 and integral in rotation thereof.
- the periphery of the isolation cam 46 has a main portion in a circular arc 47 centered on the axis of the elements 7, 9, 46 and a concave portion 48 shorter.
- a spout 49 of an isolator rocker 50 is applied against the periphery of the isolation cam 46 by a return spring 51 acting on the isolating rocker 50.
- the isolating rocker 50 pivots about a pivot 52 mounted on a fixed part of the mechanism or movement, for example on the stage of the movement.
- This isolation flip-flop 50 carries the pivots 17 ', 23' and 27 'of the actuating lever 16', the lever of the days 22 'and the date lever 26'.
- the pivots 17 ', 23' and 27 ' are distinct from one another and the pivots 23' and 27 'are independent of the rotations of the actuating lever 16' around the pivot 17 ', in other words they are not carried by the actuating lever 16 '.
- the isolation cam 46 and the isolating rocker 50 allow the actuating lever 16 'and the day and date levers 22', 26 'to perform more complex movements than a simple pivoting, so that the pins 34 ', 35' each cyclically describe a closed curve.
- Each cycle to which each pin 34 ', 35' is subjected comprises a first movement during which the pin 34 ', 35' emerges from the internal toothing 3, 4 of the indicator disk 1, 2 without touching the latter and therefore without modifying its angular position. (See Figure 5) and a second movement during which the pin 34 ', 35' enters the internal toothing 3, 4 ( Figure 6) to move a step indicator disc 1, 2. More precisely, as shown in FIG. 4, just after midnight the spout 42 of the intermediate lever 40 is located in the lower part of the calendar cam 9, which immobilizes the latter, and the spout 49 of the isolator rocker 50 is located in the concave portion 48 of the isolation cam 46.
- the isolation cam 46 rotates with the calendar wheel 7 in the direction 8 and the tip 49 of the isolator rocker 50 rises from the concave portion 48 to the arcuate portion 47, depot thus lacing the assembly 16 ', 22', 26 'mounted on the isolating rocker 50 so as to release the pins 34', 35 'internal teeth 3, 4 (see Figure 5).
- the calendar cam 9 is driven by the timing wheel 7, which raises the intermediate lever 40 against the action of its spring 43 and pivots the actuating lever 16 'around its pivot 17' by the action of the pin 44.
- the actuating lever 16 ' rotates the levers of days and dates 22', 26 'around their pivots 23 ', 27' in a way that moves the pins 34 ', 35' in the direction opposite to the direction of rotation of the indicator discs 1, 2.
- the spout 49 is on the arcuate portion 47 of the cam isolation 46 the isolation flip-flop 50 remains stationary. A little before midnight, the spout 49 falls into the concave portion 48 (see Figure 6) which makes the pin pins 34 ', 35' into the teeth 3, 4, more precisely into the adjacent teeth (in the direction reversal of the direction of rotation of the indicator discs 1, 2) to the interlockings in which the pins 34 ', 35' were in FIG. 4.
- the spout 42 of the intermediate lever 40 drops from the top to the lower part of the calendar cam 9 and carries with it the actuating lever 16 'and the levers of the days and dates 22', 26 ', the latter advancing the indicator discs 1, 2 each by one step, that is, ie l / 7th round for the day indicator disc 1 and 1/31 th of a turn for the calendars indicator disc 2.
- disc indicators 1, 2 are then kept immobile by their necklaces 5, 6 for 24 hours until their next activation.
- the isolation cam 46 and the isolating rocker 50 allow the use of actuating parts such as the pins 34 ', 35' which are rigidly connected to the rest of the levers 22 ', 26', unlike the pins 34, Of the first embodiment.
- actuating parts rigidly connected to the rest of the levers 22 ', 26' are advantageous in that they can serve as a stop for the indicator discs 1, 2 to prevent the latter from jumping more than one step under the effect of their inertia at the moment of the fall of the intermediate lever 40.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13722060.4A EP2891017A1 (en) | 2012-08-28 | 2013-04-22 | Display mechanism, for timepiece |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP12006084 | 2012-08-28 | ||
PCT/IB2013/000755 WO2014033510A1 (en) | 2012-08-28 | 2013-04-22 | Display mechanism, for timepiece |
EP13722060.4A EP2891017A1 (en) | 2012-08-28 | 2013-04-22 | Display mechanism, for timepiece |
Publications (1)
Publication Number | Publication Date |
---|---|
EP2891017A1 true EP2891017A1 (en) | 2015-07-08 |
Family
ID=46798972
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP13722060.4A Withdrawn EP2891017A1 (en) | 2012-08-28 | 2013-04-22 | Display mechanism, for timepiece |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP2891017A1 (en) |
HK (1) | HK1206824A1 (en) |
WO (1) | WO2014033510A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3608729B1 (en) * | 2018-08-09 | 2024-07-31 | Rolex Sa | Clock calendar device |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH470703A (en) * | 1965-06-14 | 1967-01-31 | Montres Perret Et Berthoud Sa | Timepiece comprising an instant-jump date mechanism |
CH462724A (en) * | 1965-06-17 | 1968-05-31 | Schild Sa A | Calendar mechanism for watch movement with winding stem |
US3439493A (en) * | 1967-01-10 | 1969-04-22 | Bulova Watch Co Inc | Day-date calendar timepiece |
CH512097A (en) | 1967-12-22 | 1971-05-14 | Tissot Horlogerie | Watch with device indicating the day, week and date |
AT296892B (en) | 1969-12-16 | 1972-02-25 | Allemann Praez Smaschb Ets | Date switching device for clockworks |
DE2060056A1 (en) | 1970-12-07 | 1972-06-15 | Pforzheimer Uhren Rohwerke | Date switch for clocks |
FR2174730B1 (en) | 1972-03-09 | 1977-01-14 | Pforzheimer Uhren Rohwerke | |
JPS5241424Y2 (en) | 1972-04-19 | 1977-09-19 | ||
CH691088A5 (en) * | 1997-03-27 | 2001-04-12 | Girard Perregaux Sa | mechanism at the time of a watch with perpetual calendar movement. |
-
2013
- 2013-04-22 WO PCT/IB2013/000755 patent/WO2014033510A1/en active Application Filing
- 2013-04-22 EP EP13722060.4A patent/EP2891017A1/en not_active Withdrawn
-
2015
- 2015-08-04 HK HK15107466.3A patent/HK1206824A1/en unknown
Non-Patent Citations (1)
Title |
---|
See references of WO2014033510A1 * |
Also Published As
Publication number | Publication date |
---|---|
HK1206824A1 (en) | 2016-01-15 |
WO2014033510A1 (en) | 2014-03-06 |
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