EP2463731A1 - Schlagwerkmechanismus einer Armbanduhr - Google Patents

Schlagwerkmechanismus einer Armbanduhr Download PDF

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Publication number
EP2463731A1
EP2463731A1 EP10194573A EP10194573A EP2463731A1 EP 2463731 A1 EP2463731 A1 EP 2463731A1 EP 10194573 A EP10194573 A EP 10194573A EP 10194573 A EP10194573 A EP 10194573A EP 2463731 A1 EP2463731 A1 EP 2463731A1
Authority
EP
European Patent Office
Prior art keywords
stamp
hammer
magnetic element
micro
magnetic
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.)
Granted
Application number
EP10194573A
Other languages
English (en)
French (fr)
Other versions
EP2463731B1 (de
Inventor
Nakis Karapatis
Davide Sarchi
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 EP10194573.1A priority Critical patent/EP2463731B1/de
Priority to CH02065/10A priority patent/CH704198A2/fr
Priority to US13/310,229 priority patent/US8537642B2/en
Priority to CN201110410144.0A priority patent/CN102566400B/zh
Priority to JP2011270911A priority patent/JP5330492B2/ja
Publication of EP2463731A1 publication Critical patent/EP2463731A1/de
Priority to HK13100383.0A priority patent/HK1173234A1/xx
Application granted granted Critical
Publication of EP2463731B1 publication Critical patent/EP2463731B1/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
    • G04B21/06—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
    • G04B21/08—Sounding bodies; Whistles; Musical apparatus
    • 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
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/028—Sounding bodies; boxes used as sounding cases; fixation on or in the case

Definitions

  • the invention relates to a striking mechanism of a watch or possibly a music box.
  • the mechanism is capable of generating one or more sounds to signal an alarm or minute repeats, or a piece of music in the case of a music box.
  • the stamp or stamps used are each constituted by a metal wire generally of circular shape and placed in a plane parallel to the dial of the watch.
  • the metal wire of each stamp is generally arranged around the movement, in the watch cage and above a plate on which the different parts of the movement are mounted.
  • One end or several ends of each stamp are fixed, for example by brazing, to a stamp holder integral with the plate, for example, which may be unique for all the stamps.
  • the other end of each stamp may be generally free.
  • the striking mechanism of the watch comprises at least one hammer actuated at predetermined times.
  • the vibration of each stamp is produced by the impact of the corresponding hammer on the stamp in particular near the stamp holder.
  • Each hammer performs a partial rotation in the plane of the stamp or stamps so as to strike the corresponding stamp and make it vibrate in its plane. Part of the vibration of the stamp is also transmitted to the plate by the stamp holder.
  • the mechanical impact between the hammer and the timbre of a traditional striking mechanism is difficult to control. It is the same for the optimization of the sound efficiency, which is strongly limited in the audible frequency range, in particular in the frequency range between 1 kHz and 4 kHz, but also between 4 kHz and 20 kHz. This is because the mechanical impact time of the hammer against the timbre is very short and most of the energy is transmitted to high frequency vibration modes higher than 4 kHz. This duration of impact of the hammer against the stamp can not generally be increased by modifying the geometry, the inertia and the material of the parts involved, without also causing a significant decrease in impact energy. In addition, the mechanical shocks, including the impact of the hammer against the stamp, can induce noise especially in case of double impact, and cause wear of the stamp, which is a drawback.
  • the invention therefore aims to overcome the disadvantages of the state of the art by providing a striking mechanism of a watch, which uses a new principle for the generation of one or more sounds of at least one stamp without direct mechanical contact of the hammer against the stamp in a bell mode.
  • the invention relates to a striking mechanism of a watch cited above, which comprises the features defined in the independent claim 1.
  • An advantage of the striking mechanism according to the invention lies in the fact that the stamp can be struck by means of a magnetic arrangement without direct mechanical contact between the hammer and the stamp. It can be provided for the magnetic arrangement to provide the patch with at least one fixed permanent magnet, and the striking portion of the hammer with a permanent magnet movable opposite the fixed permanent magnet, but with opposite magnetization polarity. .
  • the duration of the striking pulse can be advantageously increased. This makes it possible to maximize the energy transfer in tone vibration modes at low frequencies, especially in the frequency range between 1 kHz and 4 kHz.
  • the coefficient of restitution is greater than that of a traditional striking mechanism with mechanical shocks.
  • the parasitic noise of mechanical shocks is thus eliminated, and the multiple pulses, as well as their interference on the vibration of the stamp are also eliminated.
  • a striking mechanism 1 for a bell watch essentially comprises a stamp 11, which is connected for example to one of its ends to a stamp holder 12, while the other end is free of movement.
  • the stamp holder can be preferably fixed on a plate not represented by a movement of the watch, but it can also be envisaged to fix it on an inner part of the watch case.
  • the striking mechanism further comprises a rotary mounted hammer 2 around an axis 7 for example on the plate near the stamp holder. This hammer is intended to activate said stamp 11 so that it produces at least one sound, for example to signal the hours, minutes or a scheduled alarm time.
  • the stamp 11 may be made in the form of a portion of a circle for example by means of a wire, which may be in a ferromagnetic material (iron, nickel, steel or cobalt), or also in a precious metal or in metal glass. Traditionally, the portion of circle surrounds a portion of the not shown watch movement. This portion of the circle of the stamp extends substantially in a plane parallel to the plate and the dial of the not shown watch.
  • the cross section of the stamp 11 may define a rectangle or preferably a disc of diameter less than 0.8 mm.
  • the stamp may also have a shape other than that of a portion of a circle, for example a rectilinear shape or a rectangular shape.
  • a striking portion of the hammer advantageously comprises a first magnetic element, which may be a movable permanent magnet 20.
  • This mobile permanent magnet 20 may advantageously be a micro-magnet.
  • the micro-magnet can be glued or brazed or inserted into a recess of the striking portion of the hammer. It can also be made in the material of the striking portion of the hammer by a well-known magnetization operation. However, to achieve the magnetization of the striking portion of the hammer, the striking portion must be made of ferromagnetic material.
  • This striking portion of the hammer which comprises the movable permanent magnet 20, is kept at a distance from the stamp via a damping spring 5, while a driving spring 3 can be cocked to drive said hammer via a rod 6 of the hammer towards the stamp to make it vibrate.
  • the damping spring 5 is rotatably mounted about an axis 8 fixed to the watch plate.
  • a wheel 4 of adjustment is also provided on which is placed a pin 4a off-center. This pin is in contact with a surface of a first cam-shaped end of the damping spring.
  • the other end of the damping spring 5 holds the hammer 2 through the rod 6 in a rest position.
  • the rest distance between the striking portion of the hammer and the stamp 11 can for example be adjusted by means of the wheel 4 with the pin 4a in contact with the surface of the first end of the damping spring 5.
  • the patch 11 also comprises a second magnetic element, which may be a fixed permanent magnet 21.
  • This fixed permanent magnet may advantageously be a micro-magnet of equivalent size or different from the moving micro-magnet 20 of the hammer.
  • This micro-magnet can also be attached to the stamp by gluing or brazing or inserted into a housing made of the stamp material. It may also be provided to fix two parts of the stamp on each side of the micro-magnet solder.
  • This micro-magnet of the stamp can also be made directly in the stamp material, which must be ferromagnetic, by a well-known magnetization operation.
  • the fixed permanent micro-magnet 21 of the patch is arranged at least partially facing the moving permanent micro-magnet 20 of the hammer 2, but with a reverse magnetic polarity. Preferably, the two micro-magnets are directly opposite each other.
  • This fixed permanent micro-magnet 21 of the stamp can also constitute a weight to increase the density of generated partials and increase the quality factor of the stamp.
  • a repulsion force is generated.
  • the two North poles of the micro-magnets are facing each other. This repulsive force is all the greater, the more the micro-magnets are close to each other.
  • a magnetic pulse occurs for the generation of an acoustic vibration of said stamp without direct mechanical contact of the hammer against the stamp.
  • a transfer of mechanical energy between the hammer and the stamp occurs by means of only a magnetic interaction. This energy transfer between the hammer 2 and the stamp 11 can therefore take place without mechanical contact of the hammer against the stamp.
  • the duration of the pulse on the patch 11 can be optimized independently of the speed of the hammer 2, which is driven by the drive spring 3, but by changing the size of the micromagnets 20, 21 or by using micro-magnets. magnets having a different magnetization. Under these conditions, it is possible to maximize the energy transfer to the vibration modes of the timbre in the preferred frequency range between 1 kHz and 4 kHz. With the generation of a vibration of the stamp 11 by a magnetic pulse, any parasitic noise due to shocks is eliminated.
  • the repulsive force between the two permanent micromagnets 20, 21 increases according to the 4 th power of the distance in local approximation. This is true in the case where the two micro-magnets are small relative to the distance between them. This means that the two micromagnets 20, 21 do not come into direct mechanical contact with each other. The repulsion becomes 16 times greater, when the distance separating the two micro-magnets is divided by two. Therefore, the damping spring 5 is used mainly to move the hammer a certain distance from the stamp in a rest mode, but not to adjust the energy transfer during the hammer strike, as in a traditional ring mechanism.
  • the magnetic force can be of the order of 1 N.
  • the distance between the hammer 2 of the stamp 11, when hammering may be of the order of 5 microns or larger so as to generate a sufficient vibration of the stamp.
  • These permanent micro-magnets can be made with a size of 1 mm 3 or less, generating a magnetic field less than 1200 Gauss. In a rest position of the hammer, the distance separating the portion of hammer striking 2 of the stamp 11 may be less than 0.3 mm being adjusted by the damping spring 5.
  • FIG 2 it is represented the graph of the force acting on the stamp as a function of the pulse duration when striking the hammer for a traditional striking mechanism and for a striking mechanism according to the invention.
  • the two micro-magnets have the same permanent magnetization with a first magnetization value m1 for curve A and a second magnetization value m2 for curve B.
  • the second magnetization value m2 is greater than the first magnetization value m1.
  • Curve C represents the force during a mechanical shock of the hammer against the stamp in the ring mode.
  • the initial speed of the hammer, the driving spring and the damping spring are identical for this comparison.
  • the force is exerted on contact between the hammer and the stamp.
  • the pulse duration is very short.
  • the force acts at a distance and the pulse, which results, has a longer duration.
  • the total energy transferred is also greater compared to the traditional ringing mechanism.
  • the figure 3 it is represented the amplitude of the partials following a fast Fourier transform as a function of the oscillation frequency of the stamp, for a traditional ringing mechanism and for a striking mechanism according to the invention.
  • the dashed curve corresponds to the magnetic pulse, while the curve in solid lines corresponds to a mechanical shock.
  • the vibrations of the timbre are composed of partials, which are produced either by the mechanical shock of the timbre, or by the impulse magnetic.
  • the magnetic pulse used corresponds to a magnetization of m2 value of the micro-magnets, as mentioned above with reference to the figure 2 .
  • the high frequency components especially greater than 20 kHz, are reduced in the case of a magnetic pulse compared to a mechanical shock.
  • the relative energy contained in the modes between 1 kHz and 4 kHz corresponds to 40% of the total energy transferred in the case of a traditional mechanical shock, and to 55% of the total energy transferred in the case of a magnetic pulse. This shows that the energy transfer in low frequency tone vibration modes is maximized with the magnetic arrangement of the ringing mechanism of the invention. Any unwanted noise is also eliminated.
  • the two or more mobile permanent magnets on the striking portion of the hammer and two or more permanent micro-permanent magnets on the stamp at least in part opposite of two of the micro-magnets of the hammer.
  • the two fixed micro-magnets of the stamp are respectively facing each micro-magnet of the striking portion of the hammer, but with an opposite magnetization polarity.
  • the South pole of one of the micro-magnets of the hammer can be facing the South pole of one of the micro-magnets of the stamp, while the North pole of the other micro-magnet of the hammer can be opposite the North Pole. of the other micro-magnet of the stamp. It may also be envisaged that only the North or South poles of the micro-magnets of the hammer are facing the North poles or South poles of the mobile micro-magnets of the stamp for the generation of a repulsive force.
  • a coil that can be connected to a DC source to generate a magnetic field of determined polarity.
  • Each coil may also be arranged to be disconnected from the DC source in a rest mode of the striking mechanism.
  • a middle portion of the stamp may be attached to a stamp holder integral with the plate or the middle part of the watch.
  • the hammer can be mounted on the middle of the watch as well. It may also be provided that the hammer is actuated in translation with its micro-magnet in a direction perpendicular to the micro-magnet stamp to come vibrate said stamp in a ring mode.
  • the striking mechanism may comprise several timbres each activated by a respective hammer via a magnetic arrangement.
  • a permanent magnet on the hammer facing a magnetic element of the stamp which is in the form of a coil traversed by a direct current to generate a magnetic field of polarity opposite to the permanent magnet of the hammer.
  • a permanent magnet may be provided on the stamp and a magnetic element on the hammer, which is in the form of a coil traversed by a direct current to generate a magnetic field of opposite polarity to the permanent magnet of the stamp.
  • two permanent magnets on the stamp or the hammer partially opposite a permanent magnet of opposite polarity on the hammer or the stamp.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
EP10194573.1A 2010-12-10 2010-12-10 Schlagwerkmechanismus einer Armbanduhr Active EP2463731B1 (de)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP10194573.1A EP2463731B1 (de) 2010-12-10 2010-12-10 Schlagwerkmechanismus einer Armbanduhr
CH02065/10A CH704198A2 (fr) 2010-12-10 2010-12-10 Mecanisme de sonnerie d'une montre.
US13/310,229 US8537642B2 (en) 2010-12-10 2011-12-02 Watch striking mechanism
CN201110410144.0A CN102566400B (zh) 2010-12-10 2011-12-09 表的击打机构
JP2011270911A JP5330492B2 (ja) 2010-12-10 2011-12-12 ウォッチストライキング機構
HK13100383.0A HK1173234A1 (en) 2010-12-10 2013-01-10 Watch striking mechanism

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10194573.1A EP2463731B1 (de) 2010-12-10 2010-12-10 Schlagwerkmechanismus einer Armbanduhr

Publications (2)

Publication Number Publication Date
EP2463731A1 true EP2463731A1 (de) 2012-06-13
EP2463731B1 EP2463731B1 (de) 2015-06-17

Family

ID=44069920

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10194573.1A Active EP2463731B1 (de) 2010-12-10 2010-12-10 Schlagwerkmechanismus einer Armbanduhr

Country Status (6)

Country Link
US (1) US8537642B2 (de)
EP (1) EP2463731B1 (de)
JP (1) JP5330492B2 (de)
CN (1) CN102566400B (de)
CH (1) CH704198A2 (de)
HK (1) HK1173234A1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2720091A1 (de) * 2012-10-15 2014-04-16 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Klangkörper für Läutwerk einer Uhr
EP4310605A1 (de) * 2022-07-20 2024-01-24 The Swatch Group Research and Development Ltd Uhrwerk mit einem schlagwerk, das mit einer flexiblen führung ausgestattet ist

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH710948A2 (fr) * 2015-04-09 2016-10-14 Montres Breguet Sa Mécanisme d'activation magnétique de sonnerie d'horlogerie.
EP3185080B1 (de) * 2015-12-22 2019-12-18 Montres Breguet S.A. Uhrmechanismus, der ein schwenkorgan umfasst, das mit magnetischen rückstellmitteln ausgestattet ist
EP3543801A1 (de) * 2018-03-21 2019-09-25 Montres Breguet S.A. Schlagwerkmechanismus einer uhr
EP3663869B1 (de) * 2018-12-06 2021-06-16 Montres Breguet S.A. Schlagwerkmechanismus einer uhr mit hängehammer
EP3838423A1 (de) * 2019-12-20 2021-06-23 The Swatch Group Research and Development Ltd Musik- oder schlagwerkmechanismus, der ein system mit einem stromgenerator umfasst
EP3885843A1 (de) * 2020-03-24 2021-09-29 The Swatch Group Research and Development Ltd Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist
EP4105733A1 (de) * 2021-06-15 2022-12-21 Montres Breguet S.A. Perkussionsschlagwerk, insbesondere für uhren
EP4105734A3 (de) * 2021-06-15 2023-03-15 Montres Breguet S.A. Mikromechanischer mechanismus, der mit einem schlag-betätigungssystem ausgestattet ist, insbesondere für uhren

Citations (3)

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Publication number Priority date Publication date Assignee Title
FR1214428A (fr) * 1958-12-07 1960-04-08 Hatot Leon Ets Perfectionnements aux appareils électromagnétiques applicables notamment aux avertisseurs horaires autonomes
FR2408862A1 (fr) * 1977-11-11 1979-06-08 Haller Jauch & Pabst Urgos Uhr Mecanisme de frappe a commande electrique pour horloges munies de sonnerie
EP2048548A2 (de) * 2007-10-10 2009-04-15 Richemont International S.A. Hammer für ein Uhrwerk, damit ausgestattetes Uhrwerk, insbesondere Schlagwerk und mit diesen ausgestattete Uhr

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DE443387C (de) * 1926-06-12 1927-04-27 Hans Benecke Sperrvorrichtung fuer das Schlagwerk von Zimmeruhren
US2008745A (en) * 1932-07-28 1935-07-23 Ingraham E Co Modulated striking mechanism for electric alarm clocks
US2094989A (en) * 1936-03-16 1937-10-05 Waterbury Clock Company Automatic alarm clock
GB629510A (en) * 1947-11-11 1949-09-21 Automatic Telephone & Elect Improvements in or relating to electro-magnetic signalling devices
CH517332A (fr) * 1966-02-17 1971-09-15 Spadini Paolo Montre-bracelet-réveil
US4183018A (en) * 1977-12-06 1980-01-08 Kobishi Electric Co., Ltd. Motor driven type gong striking mechanism
DE2817762A1 (de) * 1978-04-22 1979-10-31 Kieninger & Obergfell Uhr mit glasenschlag
US4247933A (en) * 1978-07-20 1981-01-27 Rhythm Watch Company Limited Time striking device for timepiece
US4301448A (en) * 1980-04-22 1981-11-17 Tadashi Ishii Gong striking mechanism
US4360800A (en) * 1980-06-09 1982-11-23 Kobishi Electric Co., Ltd. Gong striking mechanism
JP2000162329A (ja) * 1998-11-30 2000-06-16 Rhythm Watch Co Ltd 時計体
KR100780148B1 (ko) * 2002-09-26 2007-11-27 세이코 엡슨 가부시키가이샤 구동 기구
EP1672442B1 (de) * 2004-12-20 2012-04-18 Glashütter Uhrenbetrieb GmbH Zeitintervallmessungsgerät mit einem Schlagwerk
CH700212B1 (fr) * 2009-01-12 2013-11-29 Richemont Int Sa Support pour timbres de sonnerie de pièce d'horlogerie.
EP2228693B1 (de) * 2009-03-13 2013-03-13 Bulgari Horlogerie S.A. Befestigungsvorrichtung für Schlagglocken einer Uhr mit Schlagwerk
CH702424A1 (fr) * 2009-12-24 2011-06-30 Montres Breguet Sa Mécanisme de sonnerie d'une montre.
EP2362278B1 (de) * 2010-02-26 2016-10-12 Montres Breguet SA Hammer für Schlagwerkmechanismus einer Armbanduhr

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1214428A (fr) * 1958-12-07 1960-04-08 Hatot Leon Ets Perfectionnements aux appareils électromagnétiques applicables notamment aux avertisseurs horaires autonomes
FR2408862A1 (fr) * 1977-11-11 1979-06-08 Haller Jauch & Pabst Urgos Uhr Mecanisme de frappe a commande electrique pour horloges munies de sonnerie
EP2048548A2 (de) * 2007-10-10 2009-04-15 Richemont International S.A. Hammer für ein Uhrwerk, damit ausgestattetes Uhrwerk, insbesondere Schlagwerk und mit diesen ausgestattete Uhr

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2720091A1 (de) * 2012-10-15 2014-04-16 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Klangkörper für Läutwerk einer Uhr
US9292004B2 (en) 2012-10-15 2016-03-22 Société Anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Gong for striking-work device of a timepiece
EP4310605A1 (de) * 2022-07-20 2024-01-24 The Swatch Group Research and Development Ltd Uhrwerk mit einem schlagwerk, das mit einer flexiblen führung ausgestattet ist

Also Published As

Publication number Publication date
US8537642B2 (en) 2013-09-17
CN102566400B (zh) 2015-08-12
JP5330492B2 (ja) 2013-10-30
EP2463731B1 (de) 2015-06-17
US20120155227A1 (en) 2012-06-21
HK1173234A1 (en) 2013-05-10
JP2012127955A (ja) 2012-07-05
CN102566400A (zh) 2012-07-11
CH704198A2 (fr) 2012-06-15

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