EP2461220B1 - Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie - Google Patents

Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie Download PDF

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Publication number
EP2461220B1
EP2461220B1 EP10193427.1A EP10193427A EP2461220B1 EP 2461220 B1 EP2461220 B1 EP 2461220B1 EP 10193427 A EP10193427 A EP 10193427A EP 2461220 B1 EP2461220 B1 EP 2461220B1
Authority
EP
European Patent Office
Prior art keywords
membrane
cells
sheet
watch
acoustic
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
EP10193427.1A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP2461220A1 (fr
Inventor
Jérôme Favre
Polychronis Karapatis (Nakis)
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 EP10193427.1A priority Critical patent/EP2461220B1/fr
Priority to CH02023/10A priority patent/CH704183A2/fr
Priority to US13/283,149 priority patent/US8638644B2/en
Priority to JP2011258257A priority patent/JP5863416B2/ja
Priority to CN201110396935.2A priority patent/CN102540854B/zh
Publication of EP2461220A1 publication Critical patent/EP2461220A1/fr
Priority to HK13100062.8A priority patent/HK1172958A1/zh
Application granted granted Critical
Publication of EP2461220B1 publication Critical patent/EP2461220B1/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
    • G04B37/00—Cases
    • G04B37/0075—Cases with means to enhance sound transmission
    • G—PHYSICS
    • G04—HOROLOGY
    • G04G—ELECTRONIC TIME-PIECES
    • G04G17/00—Structural details; Housings
    • G04G17/02—Component assemblies
    • 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
    • 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
    • G10K9/00—Devices in which sound is produced by vibrating a diaphragm or analogous element, e.g. fog horns, vehicle hooters or buzzers
    • G10K9/18—Details, e.g. bulbs, pumps, pistons, switches or casings
    • G10K9/20—Sounding members

Definitions

  • An acoustic radiation membrane for a music box such as a musical watch, or a bell watch.
  • the invention also relates to a watch, which comprises an acoustic radiation membrane.
  • the watch comprises a watch case consisting essentially of a middle and a bottom fixed and securely attached to the middle part.
  • An ice is disposed on a side opposite the bottom to seal said box.
  • a watch movement is maintained inside the watch case and provided with a striking mechanism that can be activated in specified periods of time to produce sound or music.
  • the acoustic radiation membrane is connected to the box to radiate the sound produced by the striking mechanism to the outside of the box.
  • a watch movement of a traditional architecture may also include a striking mechanism.
  • This striking mechanism can be provided to generate at least one sound via a hammer struck stamp at times determined in a bell watch to signal a programmed alarm or minute repetitions.
  • This stamp is usually a circular wire, which surrounds part of the watch movement in a watch cage. This stamp is attached to a stamp holder attached to a plate or the watch case.
  • the striking mechanism may also be provided to generate music via a multi-blade keyboard individually activated by pins of a cylinder or disc in a musical watch.
  • the keyboard blades are connected to the same heel, which can be fixed on the plate or the watch case, and the pins of the cylinder or rotating disk can lift the free end of some blades. Following the bending of the blades by the action of the pins, these blades are released by the pins.
  • the activated blades oscillate essentially at their first natural frequency.
  • the timbre of the bell watch or the keyboard of the musical watch are arranged inside the watch case.
  • the vibrations of the timbre or the keyboard blades are transmitted to the trim parts.
  • These pieces of clothing are for example the middle part, the bezel, the ice and the bottom of the watch case. These large pieces begin to radiate sound in the air under the effect of transmitted vibrations. When 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.
  • the acoustic output based on the complex vibro-acoustic transduction of the trim pieces, is low.
  • the 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.
  • a membrane of the acoustic type which is dedicated to vibro-acoustic transduction.
  • a piezoelectric element for example on the membrane to make it vibrate as mentioned in the patent CH 581 860 . So that the sound radiation of the membrane is not lost in the watch, which must be sealed, it can be provided a double bottom of the watch case, which is open to the outside. In this case, the bottom of the watch case has one or more openings for transmitting the sound of the vibrating membrane.
  • This membrane must in principle have its first natural vibration frequency, which is the effective mode of radiation, in the useful acoustic frequency band.
  • its second natural frequency which is an inefficient mode, must be outside this audible band if possible.
  • the useful acoustic frequency band is generally between 1 kHz and 4 kHz.
  • the physical properties such as the density and the Young's modulus, must make it possible to adapt the first and second eigenfrequencies. If this membrane is made of steel, the first and second natural frequencies of vibration do not fulfill the above conditions optimally. In addition, a rapid depreciation is found, which is a disadvantage.
  • this membrane In a standard bell watch, which is provided for example with an acoustic membrane, this membrane is sandwiched between a portion of the middle part and the bottom of the watch case.
  • the bottom can be made of a precious material, such as gold. It can occur in contact with the membrane usually made of steel with the gold bottom, an electrochemical potential difference especially in a humid environment. This is likely to promote the corrosion of said membrane at the contact with the gold background, which is a drawback. It must therefore also be found a stainless material with no potential difference with gold and whose internal damping is low.
  • the purpose of the invention is therefore to overcome the drawbacks of the state of the art mentioned above by providing an acoustic radiation membrane for a music box or a striking watch, made in such a way as to obtain the most uniform amplification possible on the audible frequency band, essentially in the frequency range between 1 kHz and 4 kHz.
  • the invention relates to an acoustic radiation membrane comprising the characteristics defined in independent claim 1.
  • An advantage of the acoustic radiation membrane according to the present invention lies in the fact that it comprises on at least a first thickness smaller than the total thickness of the membrane a number of cells or protruding portions. These cavities or protruding portions are of size and shape, which depend on the type of membrane material and note or musical notes to radiate effectively.
  • the acoustic radiation membrane consists of at least two sheets, of which one of the sheets at the first thickness, is provided with a number of cells preferably distributed in the form of a honeycomb. Each cell can be shaped and dimension dependent on the musical note to radiate effectively.
  • the first sheet may comprise a number of cells of different size to efficiently radiate an equivalent number of musical notes. This thus makes it possible to increase the overall acoustic level, which can be perceived by a user of the music box or ringing watch in which said acoustic membrane is placed.
  • the acoustic radiation membrane comprises a first sheet with honeycomb cells uniformly distributed, which is fixed on a second sheet without cells, and a third sheet with cells including honeycomb, fixed on one side opposite of the second sheet.
  • the second sheet may be a gold leaf
  • the first and third sheets may be provided in amorphous metal or metal glass, or also in gold.
  • the arrangement of several cell sheets may also make it possible to increase the number of eigenfrequencies in the useful audible frequency band, namely between 1 kHz and 4 kHz, in order also to increase the overall acoustic level. With such a membrane, there is a very low damping, which allows to obtain a very good sound output.
  • the invention also relates to a watch provided with an acoustic radiation membrane comprising the characteristics defined in the independent claim 13.
  • the figure 1 represents a simplified and exploded three-dimensional view of an acoustic radiation membrane 1 for a music box, such as a musical watch, or a striking watch.
  • the membrane 1 firstly comprises a first sheet 2, which comprises several cells 5, which may be of identical or different size.
  • This first sheet 2 may be glued or soldered to a first face of a second sheet 3 without cells so as to ensure a certain seal inside the watch, once the membrane is mounted in the watch case.
  • a third sheet 4 with cells 6 of identical or different size can still be glued or brazed to a second face of the second sheet 3.
  • the cells 5 of the first sheet 2 can be arranged opposite the cells 6 of identical or different size of the third sheet 4.
  • the membrane 1 comprises only the first sheet 2 at a first thickness and the second sheet 3 at a second thickness.
  • the thickness of each sheet may be less than 0.2 mm, and preferably close to 0.1 mm.
  • the cells 5, 6 of the first sheet 2 and the third sheet 4 are evenly spaced from each other, and configured in the form of a honeycomb with six identical sides. Although only three cells are represented on the figure 1 it is understood that said membrane 1 may comprise a larger number of cells to occupy most of the surface of the acoustic membrane 1. Other shapes of cells may also be imagined, for example circular or oval, but the honeycomb configuration makes it possible to better fill the surface of the cell membrane.
  • all the cells of the first sheet 2 are of identical shape and size.
  • the size is determined also according to the material of the first sheet 2 and the second sheet 3.
  • the larger the cell size the higher the corresponding frequency is serious, i.e. low frequency.
  • the greater the total thickness of the membrane 1 is important, and the frequency of the radiated note is high.
  • the total thickness of the membrane is in principle less than or equal to 1 mm.
  • each cell 5, 6 of the first sheet 2 and / or the third sheet 4 is dimensioned for each note. particular music.
  • each cell 5, 6 of the first sheet 2 and / or the third sheet 4 is dimensioned for each note. particular music.
  • it is defined a set of mini-membranes each configured for effective radiation of a particular note of a music with a uniform amplification of the first eigenfrequencies between 1 kHz and 4 kHz.
  • the number of cells in the first and / or third sheets 2, 4 is identical to the number of musical notes that can be generated in the musical watch. To radiate between 10 and 15 notes effectively with said membrane, it is necessary to make between 10 and 15 cells.
  • the first, second and third sheets 2, 3, 4 of the acoustic membrane 1 are made of a metallic material, which may be different for each sheet or the same, or of metal glass for at least one of the three sheets.
  • the second sheet 3 without cavities may be made of gold or titanium
  • the first and third sheets 2, 4 are made of amorphous metal or metal glass. It may be conceivable that all sheets are made of gold or titanium to define a membrane of the same material.
  • the acoustic membrane 1 it is preferable to first machine the cells 5, 6 on the first sheet 2 and the third sheet 4 before their attachment by bonding or brazing on the second sheet 3.
  • the cells 5 , 6 in the first and third sheets are machined for example by stamping or etching.
  • the acoustic radiation membrane 1 may be composed of more than two cell sheets to define a set of cell sheets, and at least one sheet without cells inserted between two of the cell sheets. All leaves are glued or brazed one on the other. Each sheet may have the same thickness, for example of the order of 0.1 mm or a thickness different from one another, but the total thickness of the membrane must in principle be less than or equal to 1 mm depending on the material. selected. Each cell sheet can thus be configured for the radiation of a given note among several notes to be radiated by the membrane with uniform amplification.
  • the figure 2 represents a simplified three-dimensional view of the acoustic membrane 1 once all the sheets are assembled.
  • This acoustic membrane 1 to be mounted in a ring or musical watch may be circular in shape with a diameter of between 20 and 40 mm, preferably close to 31 mm. It can be flat or bowl-shaped as shown partly in the figure 3 explained below.
  • first sheet 2 provided with cells 5 on a first thickness of the thickness total of the acoustic membrane 1
  • protruding portions may also be configured as honeycombs and each be tuned for the effective radiation of a particular note.
  • the figure 3 represents a partial section of a bell or musical watch 10.
  • the watch 10 essentially comprises an acoustic radiation membrane 1 according to the invention for improving the acoustic performance of a note or notes produced by a striking mechanism.
  • This acoustic membrane may comprise two or three sheets 2, 3, 4, of which one or two sheets 2, 4 are in cells 5, 6 and an intermediate sheet 3 is without cells.
  • At least the two cell sheets may be made of an amorphous metal or metal glass, which is a stainless material, while the second intermediate sheet 3 may be made of gold or titanium.
  • the thickness of this membrane 1 may be less than or equal to 1 mm.
  • the ring or musical watch 10 also comprises a watch movement 20, which is generally mounted on a plate 24.
  • An edge piece 22 is fixed to the plate 24, which defines a watch cage.
  • both the plate 24 and the edge piece 22 are made of a metallic material.
  • the watch movement 20 comprises a striking mechanism, not shown.
  • This striking mechanism may comprise at least one stamp mounted on a stamp holder integral with the plate 24, and at least one hammer rotatably mounted on the plate to strike said stamp in specified periods.
  • the generally circular stamp surrounds the various parts of the watch movement of the ringing watch. Such a striking mechanism is provided to signal a programmed alarm or minute repetitions.
  • the striking mechanism may comprise a keyboard with a set of blades connected to a heel, which is attached to the deck 24.
  • a note or a succession of musical notes are produced by keyboard blade vibrations.
  • Each blade is normally configured to produce a particular note, but it can be expected to have certain groups of two blades for each group to produce the same particular note.
  • the keyboard blades are lifted and released by pins integral with a cylinder or a disc rotating on the plate 24.
  • Each activated blade oscillates mainly at its first natural frequency. The vibrations generated by the activated blades are transmitted to the watch's trim pieces, which must make it possible to radiate acoustically the sound produced by each vibrating blade.
  • the acoustic membrane 1 is cup-shaped, the upper edge of which is sealingly mounted by an annular liner 18 on an inner annular flange of the bottom 15 of the box.
  • the diameter of this cuvette which may be equivalent to the diameter of the watch crystal 12, may be between 20 and 40 mm, preferably close to 31 mm.
  • An annular support 21 supports on one side the plate 24 with the edge piece 22 and rests on the upper edge of the acoustic membrane 1. At the time of attachment of the caseband 14 to the bottom 15 of the watch case, the support 21 and the peripheral edge of the acoustic radiation membrane 1 are clamped between the caseband 14 and the base rim 15.
  • the bottom 15 is mounted by known means and removably on the middle part 14 with a seal 19.
  • a watch crystal 12 is fixed in particular to the bezel 13 to seal the watch case.
  • a dial 23 is held at the edge on the middle part and arranged beneath the watch crystal 12.
  • time indication hands which are not shown, are provided on the dial, which usually carries hourly indices in the periphery.
  • the central portion of the acoustic membrane is not in contact with the support 21 and the inner surface of the bottom 15. As a result, sufficient space 17 in the box is provided so that the acoustic membrane can freely vibrate or radiate acoustically.
  • the entire acoustic membrane 1 and the bottom 15 thus constitutes a double bottom.
  • One or more openings 16 are also provided laterally through the bottom 15 to allow the acoustic membrane to radiate the sound produced by the striking mechanism to the outside.
  • the note or notes generated by said striking mechanism are transmitted directly to the acoustic radiation membrane 1 to vibrate.
  • a vibration transmission to the acoustic membrane 1 is also provided at the edge of the acoustic membrane by the connecting pieces 21, 22 and 24.
  • the acoustic membrane is composed of sheets made of gold or titanium or partly of amorphous metal, it is likely to vibrate at several first eigenfrequencies functions of the number of notes expected to radiate. These first natural frequencies are preferably located in the useful acoustic band between 1 and 4 kHz.
  • the second natural frequencies of vibration of the notes are however located above 4 kHz. This is very advantageous since the second vibration frequencies are often destructive of sound.
  • this membrane is composed of stainless materials, it can be mounted on a background for example of precious metal, such as gold. No electrochemical potential difference is thus found even in a humid environment, which means that no corrosion occurs in contact with the membrane 1 and the bottom 15.
  • the metallic glass or amorphous metal used for the production of at least two cellular sheets of the membrane may for example be a metal alloy based on titanium, zirconium and beryllium.
  • the amorphous metal alloy may comprise 41% of zirconium, 14% of titanium, 12% of copper, 10% of nickel and 23% of beryllium.
  • the Young's modulus of this alloy is 105 GPa and the elastic limit is 1.9 GPa.
  • the amorphous metal alloy may also consist of 57.5% platinum, 14.7% copper, 5.3% nickel and 22.5% phosphorus.
  • the Young's modulus of this alloy is in this case 98 GPa and the elastic limit is 1.4 GPa.
  • the acoustic membrane may be located in the watch case at the middle of the case with an opening through the caseband for the sound radiation of the acoustic membrane in vibration.
  • the acoustic membrane may possibly be located on an outer portion of the watch case, but disposed at least on an opening of the housing so that the note or notes generated by the striking mechanism can vibrate the membrane. It can be provided several acoustic membranes arranged in several places inside the watch case or superimposed. These acoustic membranes can be made with the same number or a different number of cell sheets.

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Acoustics & Sound (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
EP10193427.1A 2010-12-02 2010-12-02 Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie Active EP2461220B1 (fr)

Priority Applications (6)

Application Number Priority Date Filing Date Title
EP10193427.1A EP2461220B1 (fr) 2010-12-02 2010-12-02 Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie
CH02023/10A CH704183A2 (fr) 2010-12-02 2010-12-02 Membrane de rayonnement acoustique pour une boite a musique ou une montre a sonnerie.
US13/283,149 US8638644B2 (en) 2010-12-02 2011-10-27 Acoustic radiating membrane for a music box or striking watch
JP2011258257A JP5863416B2 (ja) 2010-12-02 2011-11-25 ミュージック・ボックス又は打鈴機構付き時計の音響膜
CN201110396935.2A CN102540854B (zh) 2010-12-02 2011-12-02 用于音乐盒或报时表的声辐射膜
HK13100062.8A HK1172958A1 (zh) 2010-12-02 2013-01-03 用於音樂盒或報時錶的聲輻射膜

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP10193427.1A EP2461220B1 (fr) 2010-12-02 2010-12-02 Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie

Publications (2)

Publication Number Publication Date
EP2461220A1 EP2461220A1 (fr) 2012-06-06
EP2461220B1 true EP2461220B1 (fr) 2019-11-06

Family

ID=44041537

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10193427.1A Active EP2461220B1 (fr) 2010-12-02 2010-12-02 Membrane de rayonnement acoustique pour une boîte à musique ou une montre à sonnerie

Country Status (6)

Country Link
US (1) US8638644B2 (zh)
EP (1) EP2461220B1 (zh)
JP (1) JP5863416B2 (zh)
CN (1) CN102540854B (zh)
CH (1) CH704183A2 (zh)
HK (1) HK1172958A1 (zh)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2367078B1 (fr) * 2010-03-16 2018-08-15 Montres Breguet SA Montre à sonnerie munie d'une membrane acoustique
CH708607A2 (fr) 2013-09-26 2015-03-31 Montres Breguet Sa Pièce d'horlogerie musicale ou à sonnerie.
EP2881807B1 (fr) 2013-12-09 2019-11-27 Montres Breguet SA Membrane de rayonnement acoustique pour une montre musicale
EP2942675B1 (fr) 2014-05-07 2016-11-16 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Montre à sonnerie
EP3002749B1 (fr) * 2014-10-03 2022-11-30 Montres Breguet SA Clavier pour boite à musique
EP3009895B1 (fr) * 2014-10-15 2017-06-28 Montres Breguet SA Montre musicale ou à sonnerie munie d'un agencement à rayonnement acoustique
CH710166B1 (fr) * 2014-10-15 2018-12-14 Montres Breguet Sa Agencement à membranes de rayonnement acoustique pour une montre musicale ou à sonnerie.
EP3211488A1 (fr) * 2016-02-26 2017-08-30 Montres Breguet S.A. Timbre atypique, montre a mecanisme de sonnerie le comprenant, et procede de fabrication du timbre
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
EP3835883A1 (fr) * 2019-12-11 2021-06-16 The Swatch Group Research and Development Ltd Agencement de maintien et transmission vibratoire d'une membrane de rayonnement acoustique dans une boîte de montre
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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US2786326A (en) * 1951-07-05 1957-03-26 Junghans Geb Ag Alarm timepiece sounding device
FR1427604A (fr) * 1960-07-04 1966-02-11 Csf Nouveau projecteur d'ondes acoustiques à lame vibrante
CH464272A4 (zh) 1971-03-30 1976-03-31
US3732686A (en) * 1972-08-10 1973-05-15 Schild Sa A Watch movement including alarm mechanism
JPS538594A (en) * 1976-07-13 1978-01-26 Seiko Instr & Electronics Ltd Electronic buzzer
CH630220B (fr) * 1978-11-10 Ebauches Sa Montre comprenant une boite fermee par une glace et un dispositif electro-acoustique.
JPS56152399A (en) * 1980-04-25 1981-11-25 Hitachi Ltd Transparent plane plate speaker
JPS5784382A (en) * 1980-11-13 1982-05-26 Seiko Epson Corp Electronic watch with piezoelectric buzzer
JPS5729888U (zh) * 1980-07-29 1982-02-17
JPH0752995B2 (ja) * 1988-04-07 1995-06-05 三菱電機株式会社 音響装置用振動板
US5299175A (en) * 1989-10-06 1994-03-29 Consejo Superior De Investigaciones Cientificas Electroacoustic unit for generating high sonic and ultra-sonic intensities in gases and interphases
GB9704486D0 (en) * 1997-03-04 1997-04-23 New Transducers Ltd Acoustic devices etc
AU2005334984B2 (en) * 2005-07-27 2011-05-19 Victor Acosta Aparicio Macrosonic generator for the air-based industrial defoaming of liquids
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JP2010114866A (ja) * 2008-11-07 2010-05-20 Authentic Ltd パネル型スピーカ
JP5327317B2 (ja) * 2009-05-11 2013-10-30 日本電気株式会社 圧電アクチュエータおよび音響部品

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Also Published As

Publication number Publication date
US8638644B2 (en) 2014-01-28
US20120140602A1 (en) 2012-06-07
HK1172958A1 (zh) 2013-05-03
EP2461220A1 (fr) 2012-06-06
CN102540854A (zh) 2012-07-04
JP5863416B2 (ja) 2016-02-16
CH704183A2 (fr) 2012-06-15
JP2012118067A (ja) 2012-06-21
CN102540854B (zh) 2014-07-09

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