EP3502795B1 - Repetitionsmechanismus mit gespannter kette - Google Patents

Repetitionsmechanismus mit gespannter kette Download PDF

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Publication number
EP3502795B1
EP3502795B1 EP17209994.7A EP17209994A EP3502795B1 EP 3502795 B1 EP3502795 B1 EP 3502795B1 EP 17209994 A EP17209994 A EP 17209994A EP 3502795 B1 EP3502795 B1 EP 3502795B1
Authority
EP
European Patent Office
Prior art keywords
hour
barrel
pulley
rotation
chain
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.)
Active
Application number
EP17209994.7A
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English (en)
French (fr)
Other versions
EP3502795A1 (de
Inventor
Christophe Bifrare
Daniel Matteazzi
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Montres Breguet SA
Original Assignee
Montres Breguet SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Montres Breguet SA filed Critical Montres Breguet SA
Priority to EP17209994.7A priority Critical patent/EP3502795B1/de
Priority to US16/143,795 priority patent/US11073797B2/en
Priority to JP2018201535A priority patent/JP6644124B2/ja
Priority to CN201811352532.6A priority patent/CN109960130B/zh
Publication of EP3502795A1 publication Critical patent/EP3502795A1/de
Application granted granted Critical
Publication of EP3502795B1 publication Critical patent/EP3502795B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/04—Hour wheels; Racks or rakes; Snails or similar control mechanisms
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/12—Reiterating watches or clocks
    • 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
    • G04B1/00—Driving mechanisms
    • G04B1/10—Driving mechanisms with mainspring
    • G04B1/16—Barrels; Arbors; Barrel axles
    • 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
    • G04B13/00—Gearwork
    • G04B13/02—Wheels; Pinions; Spindles; Pivots
    • G04B13/025—Wheels; Pinions; Spindles; Pivots with elastic means between the toothing and the hub of a toothed wheel
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/027—Regular striking mechanisms giving the full hour, half hour or quarter hour with locking wheel
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/06—Details of striking mechanisms, e.g. hammer, fan governor
    • 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
    • G04B21/00—Indicating the time by acoustic means
    • G04B21/02—Regular striking mechanisms giving the full hour, half hour or quarter hour
    • G04B21/14—Winding-up the striking mechanism by the clockwork; winding up the clockwork by the striking mechanism
    • 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
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/03—Alarm signal stop arrangements
    • 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
    • G04B31/00—Bearings; Point suspensions or counter-point suspensions; Pivot bearings; Single parts therefor

Definitions

  • the invention relates to the field of watchmaking. It relates, more precisely, to a repeating mechanism for a striking timepiece, the expression "timepiece” preferably designating a watch (with a bracelet or pocket), but can also designate a pendulum or even a clock. clock.
  • the repeater mechanism (commonly simply called repeater) has the function, on command of the user (or wearer) exerting pressure on a pusher at any time, to strike the time indicated at that moment by the hands of the part. watchmaking.
  • the movement of the pusher causes a forced rotation of the striking barrel, the hours piece itself being moved to its reading position against the spring.
  • the chain is hooked, by a proximal end, on the pulley and, by a distal end, on the hour piece.
  • the barrel spring tightens the chain which maintains the hour piece in its rest position.
  • the action of the wearer on a pusher causes the forced rotation of the barrel shaft, which frees the chain and therefore the hour piece, which is returned to its reading position by the hour spring.
  • the barrel spring When the wearer releases the pusher, the barrel spring, the driving torque of which exerted on the barrel shaft is greater than the resistive torque exerted by the hour spring on the hour piece, returns the latter to its rest position. Along the way, the hour has struck.
  • the reading (and tinkling) of the quarters and / or the minutes follows the same principle, with a limaquaint of the quarters (respectively minutes) and a quarter piece (respectively minutes) carrying a suitable quarter (respectively minutes) feeler. to come, in a reading position, in contact with the limaquaint of the quarters (respectively of the minutes).
  • This mechanism has an advantage in terms of size and assembly. Indeed, the chain, which makes the mechanical link between the barrel and the hour piece on the other hand, allows them to be positioned at a distance from each other. It is thus possible, regardless of the positioning of the hour piece in the middle, to place the barrel as close as possible to the pusher, which avoids having to resort to complex lever references, to the benefit of the reliability of the watch.
  • this chain mechanism has a drawback, which results from the fact that it operates in all-or-nothing mode, that is to say that, whatever the hour to strike, the wearer fully depresses the pusher. .
  • the actuation of the barrel causes the complete unwinding of the chain, whatever the angular travel of the hour piece.
  • the time to be read is 12.59 p.m. (which corresponds to the maximum stroke of the hour (where applicable) and minute parts, the chain remains tight. But in all other cases, the Angular travel of these parts is not maximum, and the residual travel of the chain (beyond that which it adopts in the reading position of the hour part) causes it to relax and float.
  • a first objective is therefore, in a chain repeating mechanism as described above, to minimize the mechanical fatigue of the moving parts (in particular of the chain).
  • a second objective is, more precisely, to smooth the forces generated in the chain by the action of the barrel spring.
  • a watch which is fitted with a middle part and such a repeating mechanism, mounted in the middle part.
  • the pulley spring is preferably a spiral spring, one internal end of which is integral with the ratchet, and one external end of which is integral with the pulley.
  • the pulley advantageously incorporates a stopper, and the ratchet incorporates a tooth which is applied against the stopper as long as the chain exerts a tensile force on the pulley, and which is angularly separated from it when the tensile force exerted is canceled. on the chain by the hour piece in the reading position.
  • the watch is advantageously equipped, in addition to the middle part and the repeating mechanism, with a push-piece mounted in translation on the middle part between a disarmed position in which the push-piece does not exert any driving torque on the rack, and a cocking position in which the pusher exerts a motor torque on the rack which drives the barrel shaft in rotation via the striking gear.
  • the striking gear for example comprises an input pinion meshing the toothed sector of the rack, and an output pinion rotatably fixed to the barrel shaft.
  • the striking gear preferably comprises a multiplier pinion rotatably secured to the input pinion and meshing with the output pinion.
  • the repeating mechanism may further include a locking pawl engaged with an asymmetric toothed ring gear carried by the barrel drum.
  • the repeating mechanism can also be provided with a return bearing on which the chain circulates between the striking barrel and the hours piece.
  • Watch 1 comprises a middle part 2 which defines an internal volume 3.
  • watch 1 is designed for wearing on the wrist, and its middle part 2 comprises for this purpose projecting lugs 4, on which a bracelet (not shown) is intended to be fixed.
  • Watch 1 comprises a clockwork movement designed to indicate at least the hours and minutes.
  • the movement comprises a plate intended to be housed in the internal volume 3 defined by the middle part 2, while being fixed thereto.
  • the movement also includes various functional components grouped into sub-assemblies.
  • a sub-assembly has a function other than displaying the hours, minutes and, where appropriate, seconds, it is called a “complication”.
  • the timepiece that is to say the watch 1 illustrated is striking, and comprises, for the purposes of striking the current time, a repeating mechanism, also called a “repeating complication” or, more simply (and as used hereafter), “repetition” 5.
  • the repetition 5 comprises, first of all, at least one snail 6 of the hours.
  • This snail 6 is mounted in rotation on an axis A1. It has a generally spiral shape and comprises on its periphery a succession of twelve angular sectors of decreasing distances to the axis A1.
  • the 6 o'clock snail is rotatably attached to a 7 o'clock star which includes twelve pointed teeth.
  • the repetition 5 also comprises a limaçon 8 of the quarters, mounted in rotation about an axis A2.
  • the snail 8 of the quarters comprises four angular sectors of decreasing distances to the axis A2, separated by smooth junction faces.
  • the repeater 5 further comprises a snail 9 of the minutes, integral in rotation with the snail 8 of the quarters and which comprises four branches notched on their periphery, separated by smooth junction faces which extend in the extension of the junction faces of the snail. 8 quarters.
  • the limaçon 8 of the quarters carries near its periphery a finger which, on each turn, engages a tooth of the star 7 of the hours in order to make the latter turn by a twelfth of a turn representing an advance of one hour.
  • the repeater 5 comprises, in the second place, an hour part 10, mounted in rotation about an axis A3 and carrying an hour feeler 11.
  • the hour part 10 comprises a toothed sector 12 which engages a regulator 13 via a gear train 14 multiplier.
  • the regulator 13 is magnetic; it comprises a rotor 15 rotatably mounted in a stator 16.
  • the rotor 15 has a limit speed of rotation, determined by a balance between the centrifugal force applied to movable ferromagnetic weights mounted on the rotor 15, and a counter-electromotive force generated in the weights by eddy currents induced by an alternating magnetic field produced by pairs of magnets with which the stator 16 is provided.
  • the hour piece 10 comprises an outer arm 17 provided with an hour rake 18 consisting of twelve protruding teeth.
  • the hour rake 18 actuates an hours hammer (not shown) which strikes a tuned hour gong at a predetermined acoustic frequency, possibly amplified by a structural part of watch 1 (eg caseband 2).
  • the hour hammer strikes the hour gong a number of times (between one and twelve) equal to the number of teeth of rake 18 that actuated it when returning the hour piece 10 from its reading position to its position rest.
  • the repeater 5 comprises, in the fourth place, a spring 19 for the hours, which recalls the part 10 from the hours to its reading position.
  • the hour spring 19 is a spiral spring. It is advantageously fixed on the hour part 10 by an internal end 20, and on an axis integral with the plate by an external end 21.
  • the repeater 5 also includes a quarter spring 26 which returns the quarter piece 22 to its reading position, and a minute spring 27 which returns the minute piece 24 to its reading position.
  • the minute piece 24 is provided, on an outer arm 28, with a minute rake 29 consisting of fourteen projecting teeth.
  • the minutes rake 29 actuates a minutes hammer (not shown) which strikes a minutes timbre tuned to a different predetermined acoustic frequency (for example). eg lower) than the acoustic frequency of the hour tone.
  • the minute hammer strikes the minute gong a number of times (between zero and fourteen) equal to the number of teeth of the minute rake 29 which actuated it when the 24 minute piece returns from its reading position to its resting position.
  • the part 22 of the quarters is provided, on an outer arm 30, with a rake 31 of the quarters consisting of three series of protruding teeth.
  • the quarter rake 31 operates the hour hammer and the hour hammer almost simultaneously. minute hammer to generate a close sequence of two notes.
  • the hours hammer and the minutes hammer strike their respective gongs a number of times (between zero and three) equal to the number of series of teeth of the rake 31 of the quarters which actuated them when the piece 22 of the quarters returned. its reading position to its rest position.
  • the hour piece 10, the quarter piece 22 and the minute piece 24, mounted in rotation on the same axis A3, are angularly offset with respect to each other, such that, during their rotation integral around axis A3, readings take place successively in the following order: minutes; quarters; hours.
  • the ringing is however carried out in the reverse order: hours; quarters; minutes.
  • the repetition 5 comprises, in the fifth place, a striking barrel 32.
  • the barrel shaft 33, the barrel drum 34 and the pulley 38 are all rotatably mounted about the barrel axis A4. These components are described in detail below.
  • the pulley defines a path 39 of the peripheral cam.
  • the repetition 5 comprises, in the sixth place, a chain 40 able to wind up partially on the pulley 38. More precisely, the chain is able to wind up on the cam track 39.
  • the chain 40 is hooked, by a proximal end 41, on the pulley 38 and, by a distal end 42, on the hour part 10.
  • the chain 40 comprises a plurality of links 43 articulated with respect to one another.
  • the link 43 located at the proximal end 41 of the chain 40 is fixed to a pin 44 integral with the pulley 38.
  • the link 43 located at the distal end 42 of the chain 40 is itself fixed to a pin (not visible) integral with the outer arm 17 of the part 10 of the hours.
  • the repeater 5 comprises a return bearing 45 on which the chain 40 circulates, between the striking barrel 32 and the part 10 of the hours.
  • This return bearing 45 is advantageously in the form of a bearing (eg ball bearings).
  • the pulley 38 is a separate part of the barrel drum 34 and the barrel shaft 33. More precisely, the pulley 38 is movable in rotation with respect to the barrel shaft 33.
  • the striking barrel 32 comprises a bearing 46 (eg ball) interposed between the barrel shaft 33 and the pulley 38.
  • a bearing 46 eg ball
  • the barrel shaft 32 comprises a pivot 48 and a plug 49 (which can be attached to the pivot 48 or formed integrally therewith) on which the drum 34 is mounted.
  • the plug 49 is provided on the outside with a hook 50 to which the internal end 36 of the spring 35 of the barrel is fixed.
  • the pivot 48 has, at an end opposite to the plug 49, a head 51 with a square section.
  • the barrel drum 34 comprises a bottom 52 pierced, in its center, with a hole 53 through which the barrel drum 34 is threaded (with clearance) on the bung 49, and a skirt 54 which projects axially from the bottom 52, on the outskirts of it.
  • the outer end 37 of the barrel spring 35 is fixed to the skirt 54, e.g. by means of an extra thickness 55 formed on the barrel spring 35 (possibly in the form of an attached and welded blade) housed in a notch 56 hollowed out in the internal wall of the skirt 54.
  • the barrel drum 34 carries, on its periphery (and more precisely, in the example illustrated, on the periphery of its skirt 54), a toothed crown 57 with asymmetric teeth, and the repeat 5 comprises a pawl 58 for locking in taken with this toothed crown 57, to block the rotation of the barrel drum 34 in the unwinding direction of the chain 40.
  • the ratchet 47 is formed integrally with the pivot 48.
  • the ratchet 47 is advantageously in the form of a disc.
  • the ratchet 47 incorporates a tooth 59.
  • tooth 59 protrudes radially from the periphery of ratchet 47.
  • the striking barrel 32 comprises a pulley spring 60, operating in torsion and interposed between the ratchet 47 and the pulley 38, and which exerts on the latter a resistant torque which keeps the chain 40 under tension when the ratchet 47 is decoupled in pulley rotation 48.
  • the pulley spring 60 is a spiral spring, one internal end 61 of which is integral with the ratchet 47, and one external end 62 of which is integral with the pulley 38.
  • the pulley spring 60 can be made of high elastic limit steel. As a variant, it can be made of silicon.
  • the internal end 61 of the pulley spring 60 is shaped as a first eyelet fitted into a complementary notch 63 formed in the ratchet 47 (see the detail circles at the top and on the right on the FIG. 4 ). Furthermore, the outer end 62 of the pulley spring 60 is shaped as a second eyelet nested in a complementary notch 64 formed in the pulley 38 (see the detail circles on the left on the FIG. 4 ).
  • the pulley 38 incorporates a stop 65.
  • This stop 65 is eg. formed in the vicinity of the periphery of the pulley 38.
  • the stop 65 is in the form of an attached pin, driven into a bore made in the pulley 38.
  • the tooth 59 of the ratchet 47 is applied against the stop 65 as long as the chain 40 exerts a tensile force on the pulley 38. Conversely, the tooth 59 of the ratchet is angularly spaced from the stop 65 as soon as the tensile force exerted on the chain 40 by the hour part 10 in the reading position is canceled.
  • the rack 66 has the shape of a hook.
  • the rack 66 is provided with a bore 69 through which it is mounted on its axis A5.
  • the rack 66 comprises a lever 70 carrying at its end a button 71 (which, in the example illustrated, is attached and driven into a hole formed in the end of the lever 70) , and a bent arm 72 in which the toothed sector 67 is formed.
  • the rack 66 is mounted in rotation around its axis A5 between a rest position ( FIG. 6 ) and a fully armed position ( FIG. 11 ).
  • the striking gear 68 comprises an input pinion 73 meshing with the rack 66, and an output pinion 74 integral in rotation with the barrel shaft 33 (for this purpose the pinion 74 is for example provided at its center with a square footprint complementary to the head 51 of the barrel shaft 33).
  • the striking gear 68 further comprises a multiplier pinion 75 (partially cut off on the FIG. 6 , FIG. 9 and FIG. 11 ) integral in rotation with the input pinion 73 and meshing with the output pinion 74.
  • the rack 66 and the pinions 73, 74, 75 of the striking gear 68 are dimensioned and arranged so that the total angular travel of the rack 66 between its rest position and its fully cocked position corresponds to an almost complete revolution of the pulley 38, inducing an almost total unwinding of the chain 40 of the cam path 39.
  • the rack 66 comprises twelve teeth (nine and a half of which are useful during the travel of the rack 66 between the rest position and the fully cocked position); the input pinion 73 comprises fourteen teeth; the multiplier pinion 75 comprises twenty-two teeth and the output pinion 74 comprises fifteen teeth.
  • the transmission ratio between the rack 66 and the output pinion is 0.99.
  • on the run total of the rack 66 corresponds to a rotation of the ratchet of 358 °.
  • the rack 66 is advantageously provided, at the free end of the toothed sector 67, with a stopper 76, which is here in the form of a driven insert, and which, in the fully cocked position of the rack 66 wedges against the input pinion 73 which thus forms an end-of-travel stop for the latter.
  • the stop 76 although mounted tightly by driving in, can tolerate an angular displacement, so as to form an eccentric allowing the watchmaker to finely adjust the angular position of the rack 66 (and therefore the corresponding angular position of the ratchet 47) at the end of the stroke in its fully cocked position.
  • Repetition 5 operates as follows, it being understood that the barrel drum 34, retained by the locking pawl 58, can only rotate around the barrel axis A4 in the direction indicated by the arrow X1 ( FIG. 3 ).
  • the rack 66 is permanently returned to its rest position by the torsional force of the spring 35 of the barrel forcefully wound on the axis 33 of the barrel.
  • the rack 66 occupies its rest position.
  • the barrel spring 35 exerts on the barrel shaft 33 a motor torque in the direction of arrow X1 ( FIG. 3 ).
  • the ratchet 47 is integral in rotation with the barrel shaft 33. This torque is therefore transmitted to ratchet 47, whose tooth 59 is applied (in clockwise on the FIG. 7 ) on the stop 65 with which the pulley 38 is provided.
  • the engine torque is transmitted to the pulley 38, which thus exerts a traction on the chain 40 (in the direction indicated by the arrow Y1 on the FIG. 3 ), traction whose force is determined by the ratio of the driving torque induced by the barrel shaft 33 to the radius of the pulley 38 at the point where the chain leaves it.
  • the repeater 5 is actuated by the wearer by means of a pressure exerted radially on the pusher 77, in the direction of the center of the caseband 2 (white arrow, at the bottom on the FIG. 9 and on the FIG. 10 ).
  • the pusher 77 presses the button 71 which it moves by pivoting, via the lever 70, the rack 66 around its axis A5, in the direction indicated on the FIG. 9 and FIG. 10 by arrow F1.
  • the rack 66 which meshes the input pinion 73, drives the latter in rotation in the direction indicated on the FIG. 9 by arrow F2.
  • the multiplier pinion 75 which is integral in rotation with the input pinion 73, rotates in the same direction (arrow F3). It in turn engages the output pinion 74, which is rotated in the opposite direction (arrow F4).
  • the barrel shaft 33 integral with the output pinion 74 and the ratchet 47, drives the latter in the direction of rotation of the output pinion 74 (arrow F5, FIG. 10 ), by charging the spring 35 of the barrel.
  • the barrel shaft 33 drives in its rotation the internal end 36 of the barrel spring 35 while the external end 37 thereof remains fixed in rotation with the barrel drum 34, which is retained by the barrel.
  • pawl 58 engaged with the toothed crown 57.
  • the hour part 10 reaches its reading position at the same time as the rack 66 reaches its fully cocked position.
  • the stop 65 of the pulley 38 remains in contact with the tooth 59 of the ratchet 47 over their entire angular travel, and the chain 40 remains permanently tensioned.
  • the pressure on the pusher 77 is maintained until the rack 66 has reached its fully loaded position when the stopper 76 comes to be wedged against the input pinion 73 ( FIG. 11 ). From the wearer's point of view, the push-button 77 (and therefore the bell) operates in all-or-nothing mode, that is to say that the push-button 77 must be fully depressed regardless of the time to strike.
  • the hour piece 10 blocks the chain 40, which in turn blocks the rotation of the pulley 38, which blocks the rotation of the ratchet 47, which blocks the rotation of the barrel shaft 33 and with it is the striking gear 68 and the rack 66.
  • the push-button 77 pushed back by the rack 66 via the button, for its part returns to its rest position. Repetition 5 is thus blocked.
  • repetition 5 even though the push-button 77 operates in all-or-nothing mode, and that it is pushed to the limit whatever the hour to strike, the chain 40 remains permanently maintained under tension. . In addition to the aesthetic aspect (the fluttering of the chain could be considered a defect by the demanding hobbyist), the stress peaks undergone by the chain 40 are avoided, to the benefit of its longevity - and that of the whole. repetition 5. In the end, the mechanical fatigue undergone by the chain 40 and all the moving parts of repetition 5 is limited.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Transmission Devices (AREA)
  • Measurement Of Unknown Time Intervals (AREA)
  • Devices For Conveying Motion By Means Of Endless Flexible Members (AREA)
  • Electromechanical Clocks (AREA)

Claims (10)

  1. Repetiermechanismus (5) für eine Uhr (1) mit Schlagwerk, der umfasst:
    - eine Stundenstaffel (6);
    - einen Stundenrechen (10), der einen Stundentaster (11) trägt und um eine Stundenachse (A1) drehbar zwischen
    • einer Ruheposition, in der der Stundentaster (11) von der Stundenstaffel (6) winkelmäßig beabstandet ist;
    • und einer Leseposition, in der der Stundentaster (11) mit der Stundenstaffel (6) in Kontakt gelangt,
    montiert ist,
    - eine Stundenfeder (19), die den Stundenrechen (10) in seine Leseposition zurückstellt;
    - ein Schlagwerkfederhaus (32), das umfasst:
    ∘ eine Federhauswelle (33);
    ∘ eine Federhaustrommel (34);
    ∘ eine Federhausfeder (35), deren inneres Ende (36) mit der Federhauswelle (33) fest verbunden ist und deren äußeres Ende (37) mit der Federhaustrommel (34) fest verbunden ist;
    ∘ eine Riemenscheibe (38);
    - eine Kette (40), die geeignet ist, sich teilweise um die Riemenscheibe (38) zu wickeln, wobei die Kette (40) an einem proximalen Ende (41) an der Riemenscheibe (38) und an einem distalen Ende (42) an dem Stundenrechen (10) befestigt ist;
    dadurch gekennzeichnet, dass die Riemenscheibe (38) in Bezug auf die Federwelle (33) drehbar ist und das Schlagwerkfederhaus (32) umfasst:
    - ein Sperrrad (47), das mit der Federwelle (33) drehfest verbunden ist und
    • mit der Riemenscheibe (38) rotatorisch gekoppelt ist, wenn der Stundenrechen (10) auf die Kette (40) eine Zugkraft ausübt; und
    • von der Riemenscheibe (38) rotatorisch entkoppelt ist, sobald die von dem Stundenrechen (10) auf die Kette (40) ausgeübte Zugkraft in der Leseposition aufgehoben wird;
    - eine Riemenscheibenfeder (60), die zwischen das Sperrrad (47) und die Riemenscheibe (38) eingefügt ist und auf diese ein Widerstandsdrehmoment ausübt, das die Kette (40) unter Spannung hält, wenn das Sperrrad (47) von der Riemenscheibe (38) rotatorisch entkoppelt ist.
  2. Mechanismus (5) nach Anspruch 1, wobei die Riemenscheibenfeder (60) eine Spiralfeder ist, deren inneres Ende (61) mit dem Sperrrad (47) fest verbunden ist und deren äußeres Ende (62) mit der Riemenscheibe (38) fest verbunden ist.
  3. Mechanismus (5) nach Anspruch 1 oder Anspruch 2, wobei die Riemenscheibe (38) einteilig mit einem Anschlag (65) ausgebildet ist und das Sperrrad (47) einteilig mit einem Zahn (59) ausgebildet ist, der gegen den Anschlag (65) angelegt wird, so dass die Kette (40) auf die Riemenscheibe (38) eine Zugkraft ausübt, und der hierzu winkelmäßig beabstandet ist, sobald die durch den Stundenrechen (10) auf die Kette (40) ausgeübte Zugkraft in der Leseposition aufgehoben wird.
  4. Mechanismus (5) nach einem der vorhergehenden Ansprüche, der ferner umfasst:
    - eine Zahnstange (66), die drehbar um eine Welle (A5) montiert ist und mit einem gezahnten Sektor (67) versehen ist;
    - ein Schlagräderwerk (68), das in Eingriff steht einerseits mit dem gezahnten Sektor (67) der Zahnstange (66) und andererseits mit der Federhauswelle (33).
  5. Mechanismus (5) nach Anspruch 4, wobei das Schlagräderwerk (68) ein Eingangsritzel (73), das mit dem gezahnten Sektor (67) der Zahnstange (66) in Eingriff steht, und ein Ausgangsritzel (74), das mit der Federhauswelle (33) drehfest verbunden ist, umfasst.
  6. Mechanismus (5) nach Anspruch 5, dadurch gekennzeichnet, dass das Schlagräderwerk (68) ein Übersetzungsritzel (75) umfasst, das mit dem Eingangsritzel (73) drehfest verbunden ist und mit dem Ausgangsritzel (74) in Eingriff steht.
  7. Mechanismus (5) nach einem der vorhergehenden Ansprüche, der einen Sperrkegel (58) umfasst, der mit einer von der Federhaustrommel (34) getragenen gezahnten Krone (57) mit asymmetrischer Zahnung in Eingriff steht.
  8. Mechanismus (5) nach einem der vorhergehenden Ansprüche, der ein Vorgelegelager (45) umfasst, auf dem die Kette (40) zwischen dem Schlagwerkfederhaus (32) und dem Stundenrechen (10) läuft.
  9. Tragbare Uhr (1), ausgestattet mit einem Gehäusemittelteil (2) und einem Repetiermechanismus (5) nach einem der vorhergehenden Ansprüche, der in dem Gehäusemittelteil (2) montiert ist.
  10. Tragbare Uhr (1), ausgestattet mit einem Gehäusemittelteil (2), mit einem Repetiermechanismus (5) nach Anspruch 4 und mit einem Drücker (77), der an dem Gehäusemittelteil (2) translatorisch montiert ist zwischen einer nicht gespannten Position, in der der Drücker (77) kein Antriebsdrehmoment auf die Zahnstange (66) ausübt, und einer gespannten Position, in der der Drücker (77) auf die Zahnstange (66) ein Antriebsdrehmoment ausübt, das die Federhauswelle (34) über das Schlagräderwerk (68) rotatorisch antreibt.
EP17209994.7A 2017-12-22 2017-12-22 Repetitionsmechanismus mit gespannter kette Active EP3502795B1 (de)

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EP17209994.7A EP3502795B1 (de) 2017-12-22 2017-12-22 Repetitionsmechanismus mit gespannter kette
US16/143,795 US11073797B2 (en) 2017-12-22 2018-09-27 Repeater mechanism with tensioned chain
JP2018201535A JP6644124B2 (ja) 2017-12-22 2018-10-26 張られたチェーンを備えるリピーター機構
CN201811352532.6A CN109960130B (zh) 2017-12-22 2018-11-14 具有张紧链条的问表机构

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EP3502794B1 (de) * 2017-12-22 2020-10-21 Montres Breguet S.A. Repetierwerk mit einer auf einer nocke aufgerollten kette
CH716878A1 (de) * 2019-12-02 2021-06-15 Bucherer Ag Schlagwerk, Armbanduhr und Regulator.
USD957269S1 (en) * 2020-01-09 2022-07-12 Montres Breguet Sa (Montres Breguet Ag) Montres Breguet Ltd) Watch case

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CN2831191Y (zh) * 2005-09-15 2006-10-25 杭州手表有限公司 钟表二问报时机构
ATE516523T1 (de) * 2006-04-12 2011-07-15 Montres Breguet Sa Uhr mit schlagwerk, das ein einziges federhaus umfasst
EP2498143B1 (de) * 2011-03-08 2018-05-02 Montres Breguet SA Isolationsmechanismus zwischen Uhrmechanismen zur Auslösung verschiedener Schlagwerkssignale
CH704625B1 (fr) * 2011-03-08 2020-11-30 Montres Breguet Sa Mécanisme de sonnerie de réveil par la grande sonnerie.
CH707271A2 (fr) * 2012-11-27 2014-05-30 Montres Breguet Sa Mouvement de montre comportant une fusée.
CH707273B1 (fr) * 2012-11-28 2017-03-15 Red & White Intellectual Property Man Sa Mécanisme de sonnerie.
EP3070543A1 (de) * 2015-03-18 2016-09-21 Glashütter Uhrenbetrieb GmbH Repetitionsschlagwerk mit integrierter Auslösesperre
EP3339976A1 (de) * 2016-12-23 2018-06-27 Blancpain SA Mechanisches uhr mit schlagwerk

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US20190196409A1 (en) 2019-06-27
CN109960130A (zh) 2019-07-02
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EP3502795A1 (de) 2019-06-26
JP2019113527A (ja) 2019-07-11
US11073797B2 (en) 2021-07-27

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