EP2485097B1 - Mécanisme de sonnerie d'une montre à blocage du marteau - Google Patents

Mécanisme de sonnerie d'une montre à blocage du marteau Download PDF

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Publication number
EP2485097B1
EP2485097B1 EP11193259.6A EP11193259A EP2485097B1 EP 2485097 B1 EP2485097 B1 EP 2485097B1 EP 11193259 A EP11193259 A EP 11193259A EP 2485097 B1 EP2485097 B1 EP 2485097B1
Authority
EP
European Patent Office
Prior art keywords
hammer
spring
striking mechanism
arm
gong
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
EP11193259.6A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2485097A3 (fr
EP2485097A2 (fr
Inventor
Eric Goeller
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
Publication of EP2485097A2 publication Critical patent/EP2485097A2/fr
Publication of EP2485097A3 publication Critical patent/EP2485097A3/fr
Application granted granted Critical
Publication of EP2485097B1 publication Critical patent/EP2485097B1/fr
Active legal-status Critical Current
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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
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/026—Hammer driving; hammers; devices with several hammers or sounding bodies; vibrators
    • 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
    • G04B21/10—Releasing or locking the regular stroke, e.g. for silence during the night
    • 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
    • G04B23/12—Alarm watches to be worn in pockets or on the wrist

Definitions

  • the invention relates to a bell striking mechanism provided with a hammer locking device.
  • the mechanism comprises at least one hammer arranged to strike at least one stamp attached to a stamp holder at specific times. Said hammer is kept away from the stamp by a damper counter-spring in a rest mode while being blocked by the locking device.
  • a hammer driving spring of the mechanism may be configured as a resilient beam or blade. This drive spring may be cocked to drive said hammer against the bell in a bell mode, to acoustically signal for example a programmed time period.
  • a striking mechanism can be combined with a traditional watch movement to serve in particular for minute repetitions or to signal a programmed alarm time.
  • Such striking mechanism generally comprises at least one stamp made of sapphire, quartz or metal material, such as steel, bronze, precious metal or metal glass.
  • This stamp can describe for example at least a portion of a circle around the watch movement in the watch cage.
  • the stamp is fixed by at least one of its ends to a stamp holder, which is itself secured to a watch plate.
  • a hammer mechanism is rotatably mounted on the plate for example near the stamp holder so as to hit the stamp to make it vibrate.
  • the sound produced by the hammer-struck tone is particularly in the audible frequency range from 1 kHz to 20 kHz.
  • the patent application EP1672442 discloses a striking mechanism comprising a locking device for locking / unlocking a hammer, thereby making it possible to signal the start or stop of a chronograph mechanism.
  • the striking mechanism of a watch may comprise two or more stamps attached by one of their ends to a same stamp holder, which is itself secured to a plate.
  • Each stamp may be struck by a respective hammer.
  • each hammer is driven by a proper drive spring, which had to be armed first, so as to drive the hammer against the stamp, to signal a minute repeater or an alarm time.
  • Two damping counter-springs are each provided for pushing and holding the two hammers away from the stamps in a rest mode. In a bell mode, the shock-absorbing counter-springs act with a significant force to slow the fall of each hammer before striking against the respective timbre. These counter-springs make it possible, following the striking, to push each hammer towards their rest position.
  • Eccentrics are also provided for adjusting the operation of the counter-springs to essentially prevent any rebound of each hammer against the respective stamp.
  • a disadvantage of such a structure of the striking mechanism with these counter-springs is that there is a significant loss of kinetic energy of the hammer during the striking of the respective stamp, which reduces the acoustic level of the ring. This loss of energy is largely due to the slowdown imposed by each counter-spring on the path of the hammer when it hits the stamp. Moreover, even if the pre-arming of the drive springs is increased, this implies an adaptation of the counter-springs via their eccentric to also avoid any rebound, which is another disadvantage of such a striking mechanism.
  • a striking mechanism provided with at least one stamp and a hammer capable of striking the stamp at determined times.
  • This striking mechanism further comprises a control device which allows on the one hand to provide a visual indication on the active or inactive state the mechanism, and secondly to block or unblock the hammer via a push-button.
  • a control device which allows on the one hand to provide a visual indication on the active or inactive state the mechanism, and secondly to block or unblock the hammer via a push-button.
  • the invention therefore aims to overcome the drawbacks of the state of the art mentioned above by providing a striking mechanism of a watch, which comprises a hammer locking device in order to avoid any rebound of the hammer against the hammer. stamp after a first strike in a ring mode and without significant loss of energy when the hammer falls against the stamp.
  • the invention relates to a striking mechanism of a watch, which comprises the features defined in the independent claim 1.
  • An advantage of the striking mechanism according to the present invention lies in the fact that it comprises a locking device provided with at least one lock, which blocks the hammer in a rest mode or following the first strike of the hammer against the hammer.
  • stamp in a ring mode.
  • the latch may comprise a hook to hook in particular on a notch made at the periphery of the rotary hammer.
  • the hook of the lock is moved away from the periphery of the hammer to no longer be able to directly block said hammer.
  • the hammer is driven towards the stamp to hit it a first time before the latch with a delay time is applied against the periphery of the hammer to block it. With this, there is no rebound of the hammer against the stamp, and the counter-spring no longer needs to provide a significant force on the hammer to bring it back to the rest position and keep it away from the stamp in the rest mode.
  • FIG 1 it is represented in a simplified manner a striking mechanism 1 of a watch.
  • the various parts of the striking mechanism 1 are mounted normally on a deck or bridge not shown to avoid overloading the figure 1 .
  • the plate is normally above the various elements represented by the striking mechanism, while part of the bridge is below the elements shown, being also fixed on the plate.
  • the striking mechanism 1 comprises at least one stamp 2, which is fixed at one of its ends to a stamp holder 3.
  • This stamp holder can in principle be integral with the watch plate not shown, but can also be secured to an inner part of the housing.
  • the other end of the stamp 2, not shown, is generally free movement.
  • the patch 2 may be in the form of at least a portion of a circle or rectangle around the watch movement.
  • the stamp may be for example a wire of circular or rectangular cross section, which is usually steel or precious metal or metal glass or other material.
  • the striking mechanism 1 further comprises at least one hammer 4 rotatably mounted about an axis 14 between a plate and a bridge not shown. This hammer is preferably mounted near the stamp holder 3.
  • the striking mechanism 1 also comprises a damping counter-spring 5 and a driving spring 6 of the hammer.
  • the damper counter-spring 5 makes it possible to keep the hammer 4 at a distance from the stamp 2 in a rest mode and to push it back to its rest position in a ringing mode.
  • the damper counter-spring 5 and the drive spring 6 are in the form of an elastic blade.
  • One end 25 of the counter spring 5 and one end 26 of the drive spring 6 are fixed on the deck or the deck not shown.
  • a free end of the counter-spring 5 maintains the hammer 4 away from the stamp 2 by means of a rod 9 fixed through a portion of the hammer between the axis of rotation 14 and the impact portion of the hammer.
  • the drive spring 6 may be cocked to drive the hammer in a bell mode toward the tone 2 to produce an acoustic sound.
  • the drive spring 6 is pre-armed by means of a lift 12, which is rotatably mounted on the axis of rotation 14 of the hammer 4.
  • This lift 12 has a visible tooth on the figure 1 which is normally activated by a toothed wheel, not shown, rotatably mounted on the plate or the bridge.
  • the lift 12 drives the rod 9 of the hammer 4 to rotate it about its axis of rotation 14 in a counterclockwise direction according to the figure 1 .
  • the hammer 4 further comprises a pin 10, which is fixed in a hammer opening in an end portion opposite to the impact portion relative to the axis of rotation 14.
  • This pin 10 is preferably arranged parallel to the rotation axis 14 and does not extend mainly that of a lower side of the hammer.
  • the striking mechanism further comprises according to the invention a device for locking the hammer.
  • This blocking device which will be explained in more detail below, in particular with reference to Figures 2a to 2c essentially comprises a latch 8.
  • This latch 8 is rotatably mounted on an axis of rotation 18 between the bridge and the plate, which may be parallel to the axis of rotation 14 of the hammer 4.
  • This latch 8 comprises a first arm 8a, which can be arched.
  • This first arm 8a is provided at its free end with a fastening element in the form of a hook 28.
  • This hook is intended to catch on or lean against a hooking means, which is a notch 15 made on a lateral surface at the periphery of the end portion of the hammer 4 opposite to the impact portion.
  • the notch 15 may be a flat disposed at a right angle or an acute angle from the lateral surface of the hammer to ensure a locking of the hammer by means of the hook 28 of the first arm 8a.
  • the latch 8 further comprises a second arm 8b, which can be arranged parallel to the first arm 8a and also be of the same arcuate shape.
  • the free end of this second arm 8b comprises a portion in the form of a ramp against which comes to rest a complementary leaf spring 6 'of the drive spring 6.
  • This spring blade 6' comes of material with the main blade of the drive spring 6, which is made of spring steel.
  • this complementary spring blade 6 'of the locking device is parallel to the main blade of the drive spring 6 with the free end of the complementary spring blade slightly set back from the free end of the main blade of the spring of 'training.
  • the locking device also comprises a latch spring 7 in the form of a latch, which is rotatably mounted about an axis of rotation 17 on the bridge, for example being parallel to the axis of rotation 14 of the hammer 4.
  • the spring of latch 7 comprises an elastic blade, a first free end bears on a portion of the drive spring 6 to be able to generate a return force in the direction of clockwise.
  • the latch spring 7 further comprises a portion of a second end near the axis of rotation 17. The border of this end portion of the latch spring 7 has the function of pushing the second arm 8b away from the periphery of the hammer, when the complementary leaf spring 6 'is no longer in contact with the ramp of the second arm 8b.
  • the end portion of the latch spring 7 further comprises an arcuate groove to receive the pin 10 of the hammer 4, when the hammer strikes the first time the stamp.
  • the end portion of the lock spring 7 maintains the second arm 8b, as well as the first arm 8a away from the periphery of the hammer 4.
  • the hook 28 of the first arm 8a can not yet catch on the notch 15 of the hammer, because the end portion of the latch spring 7 always keeps the second arm 8b at a distance.
  • the complementary spring blade 6 'comes into contact with the ramp of the second arm during the driving of the hammer, but without having sufficient force to allow the second arm 8b to be pushed directly towards the periphery of the hammer for a locking of the hammer. .
  • This force is also dependent on the inclination of the ramp, which can be adapted.
  • the hook 28 of the first arm 8a thus bears against the notch 15 of the hammer after the first knock against the stamp, when the hammer is pushed by the counter spring 5 in the rest position.
  • the end portion Upon returning to the rest position of the hammer 4, the end portion has no more force to push the second arm 8b away from the hammer, given the contact of the end of the complementary leaf spring 6 ' on the ramp.
  • the hammer is thus locked directly following a single strike against the stamp without subsequent rebound, which is sought by the invention.
  • the reaction force of the counter spring 5 no longer needs to be important to bring the hammer back in the rest position following the stamp strike.
  • a force of the order of 0.1 N of the counter spring 5 is sufficient to bring the hammer back to the rest position according to the invention with the above-mentioned blocking device.
  • the counter spring should in principle push the hammer with a force of about 3 N to avoid rebound.
  • the prearranged training spring normally generates a force of the order of 1 N to push the hammer toward the stamp.
  • FIGs 2a to 2c represent enlarged views of the mechanism at the blocking device, the elements of which are shown from below relative to the figure 1 .
  • the figure 2a represents the striking mechanism in a rest position with the latch 8 of the locking device, which blocks the hammer 4.
  • the figure 2b represents an initial position of the ring mode with the preassembled training spring.
  • the Figure 2c represents the moment of the first striking of the hammer 4 against the stamp with the first and second arms 8a and 8b driven to come into contact with the periphery of the hammer, but before the blocking of the hammer.
  • the striking mechanism is in a rest mode.
  • the latch 8 of the locking device makes it possible to keep the hammer 4 locked.
  • the latch which is rotatably mounted about an axis of rotation 18, preferably perpendicular to the plate, comprises a first arm 8a and a second arm 8b of equivalent general shape and arranged parallel to the first arm.
  • the first arm 8a comprises at one end a hook 28, which is at the figure 2a , against or hooked on a notch 15 of the hammer 4.
  • the second arm 8b is pushed towards the periphery of the hammer by means of the complementary spring blade 6 'in contact with a ramp 30 of the second arm.
  • the complementary leaf spring 6 pushhes the second arm against a force repulsion generated by a wedge 26 of the end portion of the latch spring 7, which acts against an edge 29 of the end of the second arm 8b.
  • the latch spring 7 via its wedge 26 does not generate a sufficient force with respect to the force of the leaf of the complementary spring 6 'to push through the ramp 30, the second arm 8b with the first arm 8a away from the periphery of the hammer 4.
  • the friction force of the complementary leaf spring 6 'on the ramp 30, as well as the inclination of the ramp also plays a role in maintaining this blocking position hammer in this mode of rest.
  • the end of the counter spring 5 is in principle in contact with the rod 9 of the hammer.
  • the lift 12, which is rotatably mounted about the axis of rotation 14 of the hammer 4, is pushed against the rod 9 by the not shown lifting spring.
  • the free end of the drive spring 6 is not in contact with the pin 10, which is also not in contact in a circular groove 27 of the end portion of the lock spring 7.
  • the figure 2b represents precisely the initial position of the ring mode with the drive spring 6 pre-cocked.
  • the free end of the counter-spring 5 is no longer in contact with the rod 9 due to the rotation of the lift 12 imposed by the toothed wheel to a maximum position.
  • the pin 10 holds the drive spring 6 in a pre-armed state.
  • the complementary spring blade 6 ' is no longer in contact with the ramp 30 and the wedge 26 has pushed the edge 29 of the second arm 8b towards the outside of the periphery of the hammer 4. In this condition, the force generated by the resilient blade bending of the latch spring 7 resting on the drive spring 6 becomes minimal.
  • any rebound of the hammer against the stamp is thus avoided. It is therefore not also necessary to provide the striking mechanism with a counter-spring pushing with great force the hammer to its rest position.
  • the counter-spring force can be minimal, which provides the advantage that a minimal loss of kinetic energy of the hammer is noted, when struck against the timbre to produce a sufficient sound level sound.
  • the complementary spring blade can be fixed by screwing or welding to the main blade of the drive spring after its completion.
  • the lock spring can be arranged around the axis of rotation of the lock.
  • the lock may comprise only one arm with at least one end with a hook and bearing elements of the complementary spring blade and possibly the latch spring.
  • the lock can be arranged in a locking position or a release position of the hammer by a rectilinear movement.
  • the hammer can be arranged to move rectilinearly to hit the stamp.
  • the pin and / or pin of the hammer can be made directly into the material of the hammer in one piece.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Electromechanical Clocks (AREA)
  • Percussive Tools And Related Accessories (AREA)
  • Springs (AREA)
EP11193259.6A 2011-01-28 2011-12-13 Mécanisme de sonnerie d'une montre à blocage du marteau Active EP2485097B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH00142/11A CH704392A1 (fr) 2011-01-28 2011-01-28 Mécanisme de sonnerie d'une montre à blocage du marteau.

Publications (3)

Publication Number Publication Date
EP2485097A2 EP2485097A2 (fr) 2012-08-08
EP2485097A3 EP2485097A3 (fr) 2016-07-27
EP2485097B1 true EP2485097B1 (fr) 2019-01-02

Family

ID=45098965

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11193259.6A Active EP2485097B1 (fr) 2011-01-28 2011-12-13 Mécanisme de sonnerie d'une montre à blocage du marteau

Country Status (6)

Country Link
US (1) US8514670B2 (xx)
EP (1) EP2485097B1 (xx)
JP (1) JP5416233B2 (xx)
CN (1) CN102621871B (xx)
CH (1) CH704392A1 (xx)
HK (1) HK1174695A1 (xx)

Families Citing this family (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH706468B1 (fr) * 2012-05-02 2016-08-15 Patek Philippe Sa Geneve Mécanisme de sonnerie et pièce d'horlogerie dont le mouvement comporte un tel mécanisme.
CH708597B1 (fr) * 2013-09-19 2021-06-15 Chopard Tech Sa Pièce d'horlogerie comprenant une boîte fermée par une glace et un mécanisme de sonnerie.
EP3070540B1 (de) * 2015-03-18 2017-11-15 Glashütter Uhrenbetrieb GmbH Schlagwerk für eine uhr mit einem hammer mit federndem einstellbarem anschlag
DE102015116416B3 (de) * 2015-09-28 2017-03-30 Lange Uhren Gmbh Schlagwerkmechanismus
EP3540526B1 (fr) * 2018-03-13 2021-05-05 Montres Breguet S.A. Mécanisme de sonnerie d'horlogerie
EP3657269A1 (fr) * 2018-11-22 2020-05-27 Blancpain SA Organe resonant pour un mecanisme de sonnerie d'une montre ou d'une boite a musique
EP3663869B1 (fr) * 2018-12-06 2021-06-16 Montres Breguet S.A. Mecanisme de sonnerie d'horlogerie a marteau suspendu

Family Cites Families (13)

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Publication number Priority date Publication date Assignee Title
US2948105A (en) * 1953-06-25 1960-08-09 Manuf Des Montres & Chronograp Alarm watch
US3315460A (en) * 1965-09-20 1967-04-25 Kienzle Uhrenfabriken Gmbh Alarm clock clapper retarder
US3777701A (en) * 1972-05-05 1973-12-11 Ansonia Clock Co Inc Clock chime intensity control
US7021819B2 (en) * 2001-03-21 2006-04-04 Glashutter Uhrenbetrieb Gmbh Timepiece including a striking work
EP1394637B1 (fr) * 2002-08-27 2006-04-26 Frédéric Piguet S.A. Pièce d'horlogerie telle que montre-bracelet comprenant un mécanisme de réveil
CH697380B1 (fr) 2004-03-09 2008-09-15 Franck Muller Watchland Sa Pièce d'horlogerie à répétition à minute.
EP1672442B1 (fr) 2004-12-20 2012-04-18 Glashütter Uhrenbetrieb GmbH Instrument pour mesurer des intervalles de temps comprenant un mécanisme de sonnerie
EP1708051A1 (fr) * 2005-03-31 2006-10-04 Zenith International SA Pièce d'horlogerie comportant un réveil
EP1798611B1 (fr) * 2005-12-14 2008-05-07 Montres Breguet S.A. Pièce d'horlogerie comportant un mécanisme de sonnerie à déclenchement instantané
EP2048548B8 (fr) * 2007-10-10 2022-02-16 Richemont International S.A. Mécanisme de sonnerie
CH702201A2 (fr) * 2009-11-06 2011-05-13 Montres Breguet Sa Mecanisme de sonnerie a agencement isolateur de bruit d'un timbre pour une montre.
CH702424A1 (fr) * 2009-12-24 2011-06-30 Montres Breguet Sa Mécanisme de sonnerie d'une montre.
EP2362278B1 (fr) * 2010-02-26 2016-10-12 Montres Breguet SA Marteau d'un mécanisme de sonnerie d'une montre

Non-Patent Citations (1)

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Title
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Also Published As

Publication number Publication date
CN102621871A (zh) 2012-08-01
JP2012159504A (ja) 2012-08-23
US20120195174A1 (en) 2012-08-02
HK1174695A1 (en) 2013-06-14
EP2485097A3 (fr) 2016-07-27
US8514670B2 (en) 2013-08-20
JP5416233B2 (ja) 2014-02-12
EP2485097A2 (fr) 2012-08-08
CH704392A1 (fr) 2012-07-31
CN102621871B (zh) 2014-09-17

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