EP3009894B1 - Agencement à membranes de rayonnement acoustique pour une montre à sonnerie - Google Patents

Agencement à membranes de rayonnement acoustique pour une montre à sonnerie Download PDF

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Publication number
EP3009894B1
EP3009894B1 EP14189091.3A EP14189091A EP3009894B1 EP 3009894 B1 EP3009894 B1 EP 3009894B1 EP 14189091 A EP14189091 A EP 14189091A EP 3009894 B1 EP3009894 B1 EP 3009894B1
Authority
EP
European Patent Office
Prior art keywords
membrane
acoustic radiating
arrangement
base
membranes
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
EP14189091.3A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP3009894A1 (fr
Inventor
Polychronis Karapatis (Nakis)
Younes Kadmiri
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 CH01576/14A priority Critical patent/CH710166B1/fr
Priority to EP14189091.3A priority patent/EP3009894B1/fr
Priority to JP2015200890A priority patent/JP6006392B2/ja
Priority to US14/879,288 priority patent/US9519271B2/en
Priority to CN201510660800.0A priority patent/CN105527819B/zh
Publication of EP3009894A1 publication Critical patent/EP3009894A1/fr
Priority to HK16112248.7A priority patent/HK1224027A1/zh
Application granted granted Critical
Publication of EP3009894B1 publication Critical patent/EP3009894B1/fr
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
    • 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
    • G04B37/00—Cases
    • G04B37/0075—Cases with means to enhance sound transmission
    • 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
    • G04B37/00—Cases
    • G04B37/08—Hermetic sealing of openings, joints, passages or slits
    • G04B37/11—Hermetic sealing of openings, joints, passages or slits of the back cover of pocket or wrist watches
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K1/00—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs
    • G10K1/06—Devices in which sound is produced by striking a resonating body, e.g. bells, chimes or gongs the resonating devices having the shape of a bell, plate, rod, or tube
    • G10K1/08—Details or accessories of general applicability
    • G10K1/10—Sounding members; Mounting thereof; Clappers or other strikers
    • G—PHYSICS
    • G10—MUSICAL INSTRUMENTS; ACOUSTICS
    • G10K—SOUND-PRODUCING DEVICES; METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING, NOISE OR OTHER ACOUSTIC WAVES IN GENERAL; ACOUSTICS NOT OTHERWISE PROVIDED FOR
    • G10K13/00—Cones, diaphragms, or the like, for emitting or receiving sound in general

Definitions

  • the invention relates to an acoustic radiation membrane arrangement for a musical watch, or a bell watch.
  • This arrangement comprises at least two superimposed membranes in the watch case for the acoustic radiation of a sound generated in the watch.
  • a striking mechanism may be provided for generating sound or music.
  • the timbre of the bell watch or the keyboard of the musical watch are generally arranged in the watch case.
  • These pieces of clothing are for example the middle part, the bezel, the ice and the bottom of the watch case. These large pieces of clothing begin to radiate sound in the air under the effect of transmitted vibrations.
  • a sound is produced either by a stamp struck by a hammer or by one or more blades of the vibrating keyboard, these pieces of clothing are able to radiate the sound produced in the air.
  • acoustic performance based on the complex vibro-acoustic transduction of the trim parts, is low.
  • material, geometry and boundary conditions of the trim pieces must be taken into account.
  • the configurations of these pieces of clothing are also dependent on the aesthetics of the watch and operating constraints, which may limit the possibilities of adaptation.
  • the frequency content of the sound of a bell or musical watch must be rich in a frequency range between 1 kHz and 6 kHz. Traditional trim parts do not allow effective radiation in this frequency band.
  • it is expected to have one or more membranes in the watch case.
  • the membranes are sized and configured so that the note (s) generated in the watch case are efficiently radiated.
  • the frequencies of the generated notes must be close to the eigen modes of vibration of the membranes so that they come into resonance.
  • the patent application EP 1 795 978 A2 describes a watch, which includes a ringing device.
  • This striking device comprises two bell-shaped membranes, which are held in the watch case coaxially one on the other by central support rods. There is also provided between the two bells and the bottom of the watch case, another thin membrane stretched and fixed between the middle and the pierced bottom of the watch case. Depending on an adjustment of the radial tension of the other membrane, it is possible to adjust the acoustic radiation frequency of this membrane. On the other hand, the other two bell-shaped membranes are not arranged to improve the sound level of the sound generated by the ringing device, which is a drawback.
  • the patent application EP 2 461 220 A1 discloses an acoustic radiation membrane arrangement for a striking or musical watch, the arrangement comprising a first membrane (sheet) disposed superimposed on a second membrane, a first peripheral edge of the first membrane and a second peripheral edge of the second membrane being intended for holding the membranes in a watch case, the first acoustic radiation membrane being configured to effectively radiate the frequencies in a first frequency band, and the second acoustic radiation membrane configured to efficiently radiate the frequencies in a second frequency band different from the first frequency band.
  • the object of the invention is therefore to overcome the disadvantages of the above-mentioned state of the art by providing an acoustic radiation membrane arrangement for a musical watch or a bell watch, made in such a way as to improve the acoustic performance over a wide area. frequency band and to also guarantee tightness and withstand under high external pressure of the watch case.
  • the invention relates to an acoustic radiation membrane arrangement comprising the features defined in independent claim 1.
  • acoustic radiation membrane arrangement lies in the fact that several superimposed membranes especially have their optimized geometry and connection each specifically to guarantee the mechanical strength and the tightness, and also to improve and standardize the acoustic radiation mainly in a frequency band of 1 kHz to 4 kHz.
  • At least one first membrane is configured to effectively radiate the frequencies in a first frequency band, which may be the frequency band from 2 kHz to 4 kHz.
  • This first membrane fixed in the watch case ensures a good seal of the portion of the watch case, which includes the mechanical movement of the watch bell or musical.
  • Such an acoustic membrane is made of a determined material and with a thickness general defined with dimensions in plan, comparable to the dimensions in plan of a box or ice of watch.
  • At least one second membrane is configured with a central portion in the form of a piston, as according to the principle of a loudspeaker. Openings can also be made in the central part.
  • This makes it possible to ensure an increase in the vibration amplitude, especially in a second frequency band, which may be a frequency band of 1 kHz to 2 kHz.
  • this second acoustic membrane is made of a specific material and with a defined overall thickness with dimensions, which can be comparable to those of the first membrane.
  • the acoustic response of this second membrane is relatively uniform in this frequency range.
  • the second membrane is superimposed on the first membrane by means of a spacer ring.
  • the assembly of the two membranes with the spacer ring there remains a cavity between the two membranes, which is tuned, at 100 Hz, to one of the two fundamental frequencies of vibration of the two membranes.
  • the openings, which are made in the central part of the second membrane can be dimensioned so that the assembly of the two membranes has an acoustic cavity, Helmholtz type resonator. This makes it possible to increase the acoustic level of the ringing or musical watch according to certain frequencies.
  • the membrane arrangement which is preferably composed of the two membranes and the spacer ring, can be made in one-piece form.
  • At least one of the two membranes may be made of a material having a Young's modulus E> 60 GPa and E ⁇ 150 GPa and a density of between 5,000 and 18,000 kg / cm 3 , of amorphous metal or of metal glass, or also in gold or platinum, or even brass, titanium.
  • the two membranes are made of two materials having the same ratio between the Young's modulus and the density.
  • At least one of the two membranes has an elastic limit greater than 1 GPa.
  • Acoustic radiation membranes can be made with a complex shape to amplify the vibration amplitude of different notes generated in a watch case. Principally, the membranes are dimensioned and configured to amplify in particular the first mode of vibration or a second mode of vibration in a frequency band of 1 kHz to 4 kHz.
  • the Figures 1a, 1b and 2 represent an embodiment of the arrangement of acoustic radiation membranes 1, which can equip a musical watch, or a ringing watch.
  • the acoustic radiation membrane arrangement 1 may be in plan view of a generally rectangular, or polygonal or preferably circular shape as shown in FIG. figure 1a .
  • the acoustic radiation membrane arrangement 1 comprises at least a first acoustic membrane 2 superimposed on a second acoustic membrane 4.
  • the first membrane 2 is superimposed on the second membrane 4 by means of an intermediate ring 3 for also define an acoustic cavity.
  • the two superimposed membranes 2, 4 are dimensioned in such a way as to be held for example pinched during their assembly in a watch case, between the bottom and the middle of the watch case with a seal at the periphery of the membranes.
  • the plan dimensions of these membranes may be comparable to the inside dimensions of the watch case or the watch ice.
  • the first membrane 2 is sized and configured so as to effectively radiate frequencies in the 2 kHz to 4 kHz frequency band of sounds or notes generated by the ringing or musical mechanism of the watch.
  • this first membrane 2 in top view defines a disc.
  • the first membrane 2 takes the form for example of a bowl with an active central portion 23, 26, defining a bottom of a bowl, a cylindrical side wall 22, or slightly conical, and a peripheral edge 21.
  • the central portion 23, 26 from its connection to the side wall 22 may have a diameter greater than 15 mm and preferably between 20 and 40 mm. This diameter may be substantially equivalent to that of a watch ice not shown.
  • the peripheral edge 21 can be clamped between a peripheral support of the bottom of the watch case and a circular inner rim of the middle through at least one seal.
  • the overall thickness of the first membrane 2 is less than or equal to 1 mm.
  • the central portion 23, 26 of this first membrane 2 comprises a base 23 defining a bottom preferably circular and flat, and an annular portion 26 at the periphery of the base 23 to form a single piece.
  • the diameter of the base 23 may be between 10 and 20% less than the diameter of the annular portion 26.
  • the annular portion 26 may be slightly conical at an angle between 70 ° and 88 °, preferably of the order of 86 ° relative to the axis of the base.
  • the first membrane 2 is made without perforated parts or openings through the material of the membrane. This ensures a good seal of the portion of the watch case, which includes the watch movement with the striking mechanism or musical.
  • Excavated regions 24, 25 of different thickness in the base 23 may also be provided. These excavated regions 24, 25 in plan view have circular asymmetric shapes, such as ellipses. With these ellipses 24, 25, this makes it possible to have a double number of eigen modes of vibration for each ellipse with respect to a uniform region of circular shape.
  • This type of embodiment of the first membrane 2 with a base 23 provided with a first excavated region 24 and a second excavated region 25 is described in detail in FIG. reference to the figure 1 in the patent application EP 2 461 219 A1 which is incorporated herein by reference.
  • the second membrane 4 is sized and configured so as to effectively radiate frequencies in the 1 kHz to 2 kHz frequency band of sounds or notes generated by the ringing or musical mechanism of the watch.
  • the second membrane 4 in top view defines a disk, with a shape is dimensions, which can be similar to those of the first membrane as explained above.
  • the second membrane 4 can also be configured in the form of a bowl with an active central portion 43, 46, defining a bottom of the bowl.
  • the second membrane 4 further comprises a cylindrical side wall 42, or slightly conical, connected to the central portion, and a peripheral edge 41 for mounting with the first membrane 2 superimposed in the watch case.
  • the active central portion of the second membrane 4 is composed of a base 43 connected to an annular portion 46 to form a single piece.
  • the base 43 of the second membrane 4 defines a bottom preferably circular and flat.
  • the diameter of the base 43 may be between 10 and 20% smaller than the outside diameter of the annular portion 46.
  • the annular portion 46 may be slightly conical at an angle identical to the annular portion 26 of the first membrane 2.
  • One or more perforated parts or openings 45 are made in the central part, in particular in the base 43 of the second membrane 4. These perforated parts or openings 45 can take the U-shaped, while defining suspended surfaces or sectors 47 partially connected to the base 43. The U-branches of the openings are oriented towards the center of the base 43. Each base of the U-shaped perforated portions is disposed on a concentric circle concentric with the base 43. Thus, the base 43 of the second membrane is connected to the annular portion 46 via one or more connection sectors 44. These connection sectors 44 are made in the material of the base 43 with a thickness less than the rest of the base to promote the vibration of the membrane.
  • the central portion may have four connection sectors 44, which are regularly spaced from each other.
  • the suspended sectors 47 are therefore also regularly spaced from each other.
  • the angle of each sector 44 determined from the center of the central portion 43 may be identical to the angle described by the base of each opening 45. Under these conditions, each sector 44 and each opening 45 are defined at an angle of 45. °. However the angle of each sector may also be different from the angle of each opening, and their number also different from four.
  • each sector 44 selected between 50 and 100 microns, while the thickness of the rest of the base 43 may be greater than 100 microns and less than 1 mm.
  • the central part of the second membrane 4 can take the form of a piston, as according to the principle of a loudspeaker, which improves the acoustic radiation especially in the frequency band from 1 kHz to 2 kHz.
  • the two acoustic radiation membranes 2 and 4 may be formed in one piece from the same material, which may be metallic. This material may be amorphous metal or metallic glass. The material chosen may also be gold or platinum, or even brass, titanium, aluminum for example with a density, a Young's modulus and an elastic limit, which are similar.
  • each membrane by combining two different materials, by welding, brazing, driving or coating.
  • the first membrane 2 may be made of a material different from the second membrane 4, but it is necessary to have good acoustic radiation at any temperature, that the temperature variation of the chosen materials is close.
  • the membrane arrangement 1 further comprises an intermediate ring 3 arranged to be mounted between the first membrane 2 and the second membrane 4.
  • This ring may be of a material equivalent to the first membrane and / or the second membrane.
  • the membrane arrangement 1 can also be made in one-piece form.
  • the ring 3 may advantageously have a diameter equivalent to the outer diameter of each membrane. This facilitates the mounting of the membrane arrangement 1 in a watch case with the peripheral edge 21, 41 of each membrane 2, 4 and the spacer ring 3 aligned. After mounting the membrane arrangement 1 in the watch case, the central portions 23, 43 of the two membranes 2, 4 are non-contacting each other and with other parts of the watch to freely vibrate.
  • the spacer ring 3 and the second membrane 4 are mounted, there remains a cavity between the two membranes.
  • This cavity can be tuned to one of the two natural frequencies of vibration of the two membranes.
  • the openings 45, which are made in the central portion of the second membrane 4, and the thickness of the spacer ring, which may be close to 1 mm, can be dimensioned so that the assembly of the two membranes present the acoustic cavity, of the Helmholtz resonator type. In this case, the system performs a vibro-acoustic coupling between the membranes and the cavity. This makes it possible to increase the acoustic level of the ringing or musical watch according to certain frequencies.
  • peripheral edges 21, 41 of the membranes 2, 4 bear in portions on the movement or on an inner rim of the middle part.
  • the peripheral edges 21, 41 do not stack anymore, but fit together.
  • the portions made at the periphery of the membranes may be of a defined geometry to improve the vibratory transfer between a sound generator and the membranes.
  • the second membrane 4 can be configured in another way than that described with reference to the Figures 1a, 1b and 2 .
  • the first membrane 2 and the second membrane 4 can be made without perforated parts and / or transparent.
  • the thickness of the central portion of one or the other membrane may also vary from the center to the outside of each membrane.
  • the figure 3 represents the acoustic level measured according to the activation frequencies imposed by a vibration generator of the watch. It can be, for example frequencies of 1 eigenmode of the blades of a ringing key.
  • a comparison is shown in the case of using a geometrically optimized conventional membrane mounted in the watch case and the dual membrane arrangement of the present invention.
  • the figures 4 and 5 represent comparisons between measurements of the acoustic level in the frequency range of the notes or sounds generated and the results of a simulation.
  • the figure 4 he is represented the case of a simple membrane, whereas at the figure 5 the case of the membrane arrangement of the present invention is shown.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • General Physics & Mathematics (AREA)
  • Acoustics & Sound (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Electromechanical Clocks (AREA)
  • Electric Clocks (AREA)
EP14189091.3A 2014-10-15 2014-10-15 Agencement à membranes de rayonnement acoustique pour une montre à sonnerie Active EP3009894B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
CH01576/14A CH710166B1 (fr) 2014-10-15 2014-10-15 Agencement à membranes de rayonnement acoustique pour une montre musicale ou à sonnerie.
EP14189091.3A EP3009894B1 (fr) 2014-10-15 2014-10-15 Agencement à membranes de rayonnement acoustique pour une montre à sonnerie
JP2015200890A JP6006392B2 (ja) 2014-10-15 2015-10-09 打撃機構付き腕時計のための音響放射膜構成
US14/879,288 US9519271B2 (en) 2014-10-15 2015-10-09 Acoustic radiating membrane arrangement for a striking watch
CN201510660800.0A CN105527819B (zh) 2014-10-15 2015-10-14 用于报时手表的声辐射膜装置
HK16112248.7A HK1224027A1 (zh) 2014-10-15 2016-10-25 用於報時手錶的聲輻射膜裝置

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP14189091.3A EP3009894B1 (fr) 2014-10-15 2014-10-15 Agencement à membranes de rayonnement acoustique pour une montre à sonnerie

Publications (2)

Publication Number Publication Date
EP3009894A1 EP3009894A1 (fr) 2016-04-20
EP3009894B1 true EP3009894B1 (fr) 2017-11-29

Family

ID=51690979

Family Applications (1)

Application Number Title Priority Date Filing Date
EP14189091.3A Active EP3009894B1 (fr) 2014-10-15 2014-10-15 Agencement à membranes de rayonnement acoustique pour une montre à sonnerie

Country Status (6)

Country Link
US (1) US9519271B2 (ja)
EP (1) EP3009894B1 (ja)
JP (1) JP6006392B2 (ja)
CN (1) CN105527819B (ja)
CH (1) CH710166B1 (ja)
HK (1) HK1224027A1 (ja)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3009894B1 (fr) * 2014-10-15 2017-11-29 Montres Breguet SA Agencement à membranes de rayonnement acoustique pour une montre à sonnerie
EP3457219A1 (fr) * 2017-09-14 2019-03-20 The Swatch Group Research and Development Ltd Membrane de rayonnement acoustique, et montre a sonnerie munie de la membrane acoustique
CN116710854A (zh) * 2020-07-30 2023-09-05 蒙特雷布勒盖股份有限公司 交感钟表组件
EP4113219A1 (fr) * 2021-06-29 2023-01-04 Montres Breguet S.A. Procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre, et montre comprenant l'ensemble de plaques accordées

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JPS538594A (en) * 1976-07-13 1978-01-26 Seiko Instr & Electronics Ltd Electronic buzzer
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CH626497B (fr) * 1977-11-07 Ebauches Sa Montre munie d'un resonateur forme par sa glace soumise a l'action d'un transducteur.
CH630220B (fr) * 1978-11-10 Ebauches Sa Montre comprenant une boite fermee par une glace et un dispositif electro-acoustique.
JPS58159597U (ja) * 1982-04-19 1983-10-24 狭山精密工業株式会社 ベルタイマ−に於ける音質向上機構の鳴体
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EP1584001B1 (fr) * 2003-01-08 2011-04-06 Asulab S.A. Appareil portable etanche avec transducteur electroacoustique
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CH698533B1 (fr) * 2005-03-11 2009-08-31 Richemont Int Sa Dispositif de fixation d'au moins un timbre de sonnerie dans une pièce d'horlogerie et procédé de fixation d'au moins un timbre de sonnerie dans une pièce d'horlogerie.
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EP2461219B1 (fr) 2010-12-02 2020-10-14 Montres Breguet SA Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie
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EP3002639B1 (fr) * 2014-10-01 2018-01-31 Montres Breguet SA Lunette de montre musicale à performance acoustique améliorée
EP3009895B1 (fr) * 2014-10-15 2017-06-28 Montres Breguet SA Montre musicale ou à sonnerie munie d'un agencement à rayonnement acoustique
EP3009894B1 (fr) * 2014-10-15 2017-11-29 Montres Breguet SA Agencement à membranes de rayonnement acoustique pour une montre à sonnerie

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Also Published As

Publication number Publication date
CH710166B1 (fr) 2018-12-14
CN105527819B (zh) 2018-01-02
HK1224027A1 (zh) 2017-08-11
JP6006392B2 (ja) 2016-10-12
US20160109856A1 (en) 2016-04-21
US9519271B2 (en) 2016-12-13
JP2016080703A (ja) 2016-05-16
CN105527819A (zh) 2016-04-27
CH710166A2 (fr) 2016-04-15
EP3009894A1 (fr) 2016-04-20

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