EP4113219A1 - Method for frequency tuning of an assembly of plates of a watch, and watch comprising the assembly of tuned plates - Google Patents
Method for frequency tuning of an assembly of plates of a watch, and watch comprising the assembly of tuned plates Download PDFInfo
- Publication number
- EP4113219A1 EP4113219A1 EP21182417.2A EP21182417A EP4113219A1 EP 4113219 A1 EP4113219 A1 EP 4113219A1 EP 21182417 A EP21182417 A EP 21182417A EP 4113219 A1 EP4113219 A1 EP 4113219A1
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- EP
- European Patent Office
- Prior art keywords
- plates
- frequency
- plate
- vibration
- watch
- 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.)
- Pending
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- 238000000034 method Methods 0.000 title claims abstract description 30
- 230000035939 shock Effects 0.000 claims abstract description 33
- 230000006978 adaptation Effects 0.000 claims abstract description 8
- 239000012528 membrane Substances 0.000 claims description 25
- 229910052594 sapphire Inorganic materials 0.000 claims description 20
- 239000010980 sapphire Substances 0.000 claims description 20
- 239000000463 material Substances 0.000 claims description 16
- 230000005855 radiation Effects 0.000 claims description 10
- 239000007769 metal material Substances 0.000 claims description 3
- 235000012431 wafers Nutrition 0.000 claims 2
- 238000005530 etching Methods 0.000 claims 1
- 238000012986 modification Methods 0.000 claims 1
- 230000004048 modification Effects 0.000 claims 1
- 238000010276 construction Methods 0.000 description 4
- 230000001133 acceleration Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 230000004913 activation Effects 0.000 description 1
- 230000003416 augmentation Effects 0.000 description 1
- 210000004027 cell Anatomy 0.000 description 1
- 239000013078 crystal Substances 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
- 230000026683 transduction Effects 0.000 description 1
- 238000010361 transduction Methods 0.000 description 1
Images
Classifications
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- 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
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- G—PHYSICS
- G10—MUSICAL INSTRUMENTS; ACOUSTICS
- G10H—ELECTROPHONIC MUSICAL INSTRUMENTS; INSTRUMENTS IN WHICH THE TONES ARE GENERATED BY ELECTROMECHANICAL MEANS OR ELECTRONIC GENERATORS, OR IN WHICH THE TONES ARE SYNTHESISED FROM A DATA STORE
- G10H1/00—Details of electrophonic musical instruments
- G10H1/44—Tuning 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
- G04B23/00—Arrangements producing acoustic signals at preselected times
-
- 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
-
- 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
- G04B29/00—Frameworks
- G04B29/02—Plates; Bridges; Cocks
- G04B29/027—Materials and manufacturing
-
- 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
- G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
- G04B43/002—Component shock protection arrangements
-
- 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
- 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
- G04B19/00—Indicating the time by visual means
- G04B19/06—Dials
- G04B19/12—Selection of materials for dials or graduations markings
-
- 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
- G04B19/00—Indicating the time by visual means
- G04B19/20—Indicating by numbered bands, drums, discs, or sheets
- G04B19/202—Indicating by numbered bands, drums, discs, or sheets by means of turning discs
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Definitions
- the invention relates to a method for frequency tuning a set of plates of a watch.
- the plates are preferably watch dial plates.
- the plates can also be used as acoustic radiation membranes of a striking or musical watch.
- the invention also relates to a watch comprising the set of plates tuned according to the tuning method.
- a striking mechanism may also be provided to generate a sound (note) or music.
- the gong of the striking watch or the keyboard of the musical watch are generally arranged in the watch case.
- the vibrations of the gong or of the blades of the keyboard are transmitted to the various covering parts.
- These covering parts are for example the middle part, the bezel, the crystal and the back of the watch case, or even a dial with plates superimposed provided with a decoration for an aesthetic aspect of the watch.
- the acoustic efficiency on the basis of the complex vibro-acoustic transduction of the casing parts, is low.
- account must be taken of the material, the geometry and the boundary conditions of the covering parts.
- the configurations of these casing parts are also dependent on the aesthetics of the watch and the operating constraints, which can limit the possibilities of adaptation.
- the frequency content of the sound of a striking or musical watch must be rich in a frequency interval between 0.5 kHz and 5 kHz or even 10 kHz.
- Traditional trim parts do not allow effective radiation in this frequency band.
- the membranes are sized and configured so that the note or notes generated in the watch case are radiated effectively.
- the frequencies of the generated notes must be close to the proper modes of vibration of the membranes so that they enter into resonance.
- nothing is generally provided concerning the frequency tuning of these membranes, in particular so that they do not come into contact with each other, mainly during a mechanical shock of the watch or also during the generation of a note or music.
- the patent application EP 1 795 978 A2 describes a watch, which includes a striking device.
- This striking device comprises two bell-shaped membranes, which are held in the watch case coaxially with one another by central support rods. There is also provided between the two bells and the back of the watch case, another thin membrane stretched and fixed between the middle part and the pierced back 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.
- the two other bell-shaped membranes are not arranged to improve the acoustic level of the sound generated by the ringing device, which constitutes a drawback.
- no frequency tuning is sought by a frequency tuning process to improve the resistance to mechanical shocks that the watch can undergo.
- the patent application EP 3 009 894 A1 describes an acoustic radiation membrane arrangement for a striking or musical watch.
- the arrangement includes a first membrane disposed overlying a second membrane. Peripheral edges of the two membranes are intended for holding the membranes in a watch case.
- the first acoustic radiation membrane is configured to effectively radiate frequencies in a first frequency band
- the second acoustic radiation membrane is configured to effectively radiate frequencies in a second frequency band different from the first frequency band.
- a spacer ring is further disposed between the peripheral edges of the first and second membranes to define an acoustic cavity.
- Nothing is provided for effecting a frequency tuning of the membranes so that they do not come into contact with one another following activation of the gong or of the blades, or mainly following a mechanical shock.
- the object of the invention is therefore to overcome the drawbacks of the aforementioned state of the art by proposing a frequency tuning method for a set of plates of a watch, in particular forming a dial of a watch so as to resist the mechanical shocks of the watch, which can be a striking or musical watch.
- the invention relates to a method for frequency tuning a set of plates of a watch, which comprises the characteristics of independent claim 1.
- each plate forming a dial can also act as an acoustic radiation membrane for a striking or musical watch.
- Each plate is tuned in frequency, in particular by controlling for example the first natural mode of vibration.
- the two plates, spaced apart from each other by a relatively small defined distance, are therefore tuned in such a way as not to come into contact against each other following a mechanical shock to the watch.
- one of the plates of which is made of fragile material, such as sapphire the two plates are likely to vibrate in phase so as not to come into contact against each other during a mechanical shock. It can also be used to improve the acoustic radiation of a note or music generated by the striking or musical watch.
- a first dial plate is made of metallic material
- a second dial plate is made of sapphire, which is a brittle and brittle hard material.
- the sapphire plate can be of a thickness equal to 0.4 mm, or even less.
- the sapphire plate can act as a second dial making it possible to introduce new aesthetic codes or it can also act as a vibrating and radiating membrane in cooperation with the first dial plate in the case of a striking watch or musical.
- the invention also relates to a watch comprising the set of plates tuned according to the tuning method, which includes the characteristics of independent claim 11.
- the figure 1 schematically represents a cross section of a watch 1 provided with a set of plates 4, 5 forming a dial in this embodiment.
- the watch 1 also comprises a case composed of a middle part 2 closed on an upper side by a glass 3 and on a lower side by a back 8.
- the watch movement 7 is located between the back 8 and the assembly forming the dial 4, 5.
- Hands 6 for indicating the time are connected to the watch movement 7 and come out of the set of plates 4, 5 to indicate the time on a dial 5 of the set of plates forming the dial.
- the set of plates can be located in another place in the watch case, necessarily using it as a set of plates forming a dial. It may be two plates spaced apart from each other forming part of the middle part 2 of watch case, or part of the bottom 8 of the watch case, for example, or another part of the watch case.
- the set of plates 4, 5 forming a dial comprises a first dial plate 4 for example made of a metallic material and above this first dial plate 4, a second plate 5 of fragile hard material, for example made of sapphire or other brittle material.
- the second plate 5 is substantially transparent so as to be able to view the aesthetic inlays or indexes on the lower surface of the second plate 5, or even also on the upper surface of the first plate 4.
- the two plates 4, 5 are mounted spaced from each other by a defined distance.
- a distance equal to or less than 1 mm can be provided between the two plates 4, 5.
- the distance separating the plates 4, 5 can be much less than 1 mm, for example 0.1 mm for the purpose not to lose too much space in the watch case 1.
- the plates 4, 5 remote from each other must be configured so as not to come into contact with each other during mechanical shocks. A frequency tuning process is therefore carried out in order to be able to adapt the vibration frequency to at least the first natural mode of vibration of one and the other of the plates 4, 5 as discussed in the remainder of the description.
- a sapphire plate 5 can be added spaced to a dial plate 4 for aesthetic codes and can come into contact with the dial plate 4 during a mechanical shock.
- the first dial plate 4 of the assembly can come into contact with the second sapphire plate 5, which can cause this second sapphire plate 5 to break, as it is a fragile material.
- the present invention is mainly based on the last point of the list cited above.
- a digital model has therefore been developed to predict the dynamics of the first dial plate 4 and of the second sapphire plate 5 during a shock to the casing.
- the first dial plate 4 and the second sapphire plate 5 are represented by mass-spring-damper systems as shown in figure 4 described below (modeling the deformation of the first natural mode of the first dial plate 4 and that of the second sapphire plate 5).
- the two masses are separated from each other by a clearance imposed by the construction ( figure 4 ).
- the figures 3a and 3b represent the graphs relating to the frequency tuning process of the plates of the assembly before and after the frequency tuning operations.
- the picture 3a represents the state before frequency tuning
- the figure 3b represents the state after frequency tuning.
- the vibration of the first plate is shown in solid lines
- the vibration of the second plate is shown in broken lines.
- each plate 4, 5 is checked following a mechanical shock generated by a test device on which the plate or plates 4, 5 are placed superimposed one above the another with a determined space between the two plates. Depending on the vibration of each plate, it can be seen whether one plate comes into contact with the other plate, which is the case shown in picture 3a .
- the first metal plate oscillates at a frequency slightly higher than 1 kHz
- the second sapphire plate oscillates at a frequency higher than the vibration frequency of the first plate and slightly higher, for example above 2 kHz. with vibration attenuation for either plate over time. It can be seen that with these differences in vibration the second plate comes directly into contact with the first plate (darker parts on the picture 3a ) and subsequently by point contacts shown by dots which is likely to cause points of breakage of the second plate made of fragile material.
- it is possible to determine the means of correction of each plate or of at least one of the plates so as to arrive at an in-phase vibration of the two plates in vibration. In this case, once the plates vibrate at a substantially equivalent frequency, they are therefore in phase according to at least the first natural mode of vibration without contact against each other as shown in figure 3b .
- the vibration frequency of the plates it can be provided to act on at least one of the plates by adding a mass to it. a determined position, for example in its center, to have the same deformation in phase as the other vibrating plate. The added mass can be driven into the center of the second plate. It can also be imagined to add several small weights at different places of the plate.
- a developed digital model can be used ( figure 4 ) implemented in the test apparatus and capable of determining the adaptation means for tuning one of the plates in frequency.
- several successive steps of controlling the frequency of vibration of each plate can be imagined in order step by step to configure at least one of the plates in order to obtain, at the end of the method, a vibration in phase of the two plates.
- the set of plates forming a dial can also serve as acoustic radiation membranes of a striking or musical watch and for which it is sought to tune said plates or membranes so that they vibrate in phase without coming into contact with each other.
- the figure 2 represents just a section of the deformation of at least the first eigenmode of the first dial plate 4.
- the deformation of the first eigenmode of the set of plates 4, 5 or higher eigenmodes could also have been illustrated the deformation of the first eigenmode of the set of plates 4, 5 or higher eigenmodes .
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Multimedia (AREA)
- Acoustics & Sound (AREA)
- Manufacturing & Machinery (AREA)
- Metallurgy (AREA)
- Electric Clocks (AREA)
- Apparatuses For Generation Of Mechanical Vibrations (AREA)
Abstract
La présente invention concerne un procédé d'accordage fréquentiel d'un ensemble de plaques (4, 5) d'une montre (1). Les plaques sont disposées l'une au-dessus de l'autre formant cadran de montre avec un espace défini entre les plaques. On génère un choc mécanique à l'ensemble des plaques, et un contrôle de la fréquence de vibration de chaque plaque est effectué. Une adaptation en fréquence de vibration d'au moins une des plaques est effectuée si différente de l'autre plaque de manière à obtenir une fréquence de vibration identique pour chaque plaque pour accorder les plaques au moins selon le premier mode propre de vibration de manière à éviter tout contact entre les plaques suite à tout choc mécanique.The present invention relates to a frequency tuning method for a set of plates (4, 5) of a watch (1). The plates are arranged one above the other forming a watch dial with a space defined between the plates. A mechanical shock is generated on all of the plates, and the vibration frequency of each plate is checked. A vibration frequency adaptation of at least one of the plates is carried out if different from the other plate so as to obtain an identical vibration frequency for each plate to tune the plates at least according to the first natural mode of vibration so as to avoid any contact between the plates following any mechanical shock.
Description
L'invention concerne un procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre. Les plaques sont de préférence des plaques de cadran de montre. Les plaques peuvent aussi être utilisées comme des membranes de rayonnement acoustique d'une montre à sonnerie ou musicale.The invention relates to a method for frequency tuning a set of plates of a watch. The plates are preferably watch dial plates. The plates can also be used as acoustic radiation membranes of a striking or musical watch.
L'invention concerne également une montre comprenant l'ensemble de plaques accordées selon le procédé d'accordage.The invention also relates to a watch comprising the set of plates tuned according to the tuning method.
Dans le cas d'une montre munie de plaques superposées en tant que cadran de montre, il doit être fait très attention d'éviter tout choc mécanique de la montre susceptible d'avoir contact entre les plaques superposées, qui peut conduire à la cassure ou fissure d'une des plaques réalisée dans un matériau fragile. Généralement, les plaques sont suffisamment espacées l'une de l'autre pour éviter tout contact l'une contre l'autre suite à un choc mécanique. Cependant le fait d'espacer suffisamment les plaques n'est pas adapté au montage dans une boîte de montre traditionnelle, car beaucoup de place est perdue pour le montage des différents composants.In the case of a watch fitted with superimposed plates as a watch dial, great care must be taken to avoid any mechanical shock to the watch liable to have contact between the superimposed plates, which could lead to breakage or crack in one of the plates made of a fragile material. Generally, the plates are sufficiently spaced from each other to avoid any contact against each other following a mechanical shock. However, the fact of spacing the plates sufficiently apart is not suitable for assembly in a traditional watch case, since a great deal of space is lost for the assembly of the various components.
Dans une montre, il peut être aussi prévu un mécanisme de sonnerie pour générer un son (note) ou une musique. Pour ce faire, le timbre de la montre à sonnerie ou le clavier de la montre musicale sont disposés généralement dans la boîte de montre. Ainsi les vibrations du timbre ou des lames du clavier sont transmises aux différentes pièces d'habillage. Ces pièces d'habillage sont par exemple la carrure, la lunette, la glace et le fond de la boîte de montre, voire un cadran à plaques superposées munies d'une décoration pour un aspect esthétique de la montre.In a watch, a striking mechanism may also be provided to generate a sound (note) or music. To do this, the gong of the striking watch or the keyboard of the musical watch are generally arranged in the watch case. Thus the vibrations of the gong or of the blades of the keyboard are transmitted to the various covering parts. These covering parts are for example the middle part, the bezel, the crystal and the back of the watch case, or even a dial with plates superimposed provided with a decoration for an aesthetic aspect of the watch.
Dans le cas d'une montre musicale ou à sonnerie, le rendement acoustique, sur la base de la transduction vibro-acoustique complexe des pièces d'habillage, est faible. Pour améliorer et augmenter le niveau acoustique perçu par l'utilisateur de la montre à sonnerie ou musicale, il doit être tenu compte de la matière, de la géométrie et des conditions aux limites des pièces d'habillage. Les configurations de ces pièces d'habillage sont aussi dépendantes de l'esthétique de la montre et des contraintes de fonctionnement, ce qui peut limiter les possibilités d'adaptation.In the case of a musical or striking watch, the acoustic efficiency, on the basis of the complex vibro-acoustic transduction of the casing parts, is low. To improve and increase the acoustic level perceived by the user of the striking or musical watch, account must be taken of the material, the geometry and the boundary conditions of the covering parts. The configurations of these casing parts are also dependent on the aesthetics of the watch and the operating constraints, which can limit the possibilities of adaptation.
Le contenu fréquentiel du son d'une montre à sonnerie ou musicale doit être riche dans un intervalle de fréquences entre 0.5 kHz et 5 kHz voire 10 kHz. Les pièces d'habillage traditionnelles ne permettent pas un rayonnement efficace dans cette bande de fréquences. Ainsi pour pouvoir améliorer encore le rendement vibro-acoustique du mécanisme de sonnerie, il est prévu de disposer une ou plusieurs membranes dans la boîte de montre par exemple l'une sur l'autre avec un espace les séparant. Les membranes sont dimensionnées et configurées pour que la ou les notes générées dans la boîte de montre soient rayonnées efficacement. Les fréquences des notes générées doivent être proches des modes propres de vibration des membranes pour qu'elles entrent en résonance. Par contre, rien n'est généralement prévu concernant l'accordage fréquentiel de ces membranes notamment pour qu'elles ne viennent pas en contact l'une contre l'autre principalement lors d'un choc mécanique de la montre ou aussi lors de la génération d'une note ou d'une musique.The frequency content of the sound of a striking or musical watch must be rich in a frequency interval between 0.5 kHz and 5 kHz or even 10 kHz. Traditional trim parts do not allow effective radiation in this frequency band. Thus, in order to be able to further improve the vibro-acoustic performance of the striking mechanism, provision is made for arranging one or more membranes in the watch case, for example one on top of the other with a space separating them. The membranes are sized and configured so that the note or notes generated in the watch case are radiated effectively. The frequencies of the generated notes must be close to the proper modes of vibration of the membranes so that they enter into resonance. On the other hand, nothing is generally provided concerning the frequency tuning of these membranes, in particular so that they do not come into contact with each other, mainly during a mechanical shock of the watch or also during the generation of a note or music.
Les contraintes relatives à l'agencement de membranes acoustiques sont généralement en contraste avec les règles de constructions mécaniques permettant de garantir l'étanchéité, ainsi que la résistance mécanique de la montre aux chocs et aux pressions extérieures importantes.The constraints relating to the arrangement of acoustic membranes are generally in contrast with the rules of mechanical construction making it possible to guarantee watertightness, as well as the mechanical resistance of the watch to shocks and to significant external pressures.
La demande de brevet
La demande de brevet
L'invention a donc pour but de pallier les inconvénients de l'état de la technique susmentionné en proposant un procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre, notamment formant cadran d'une montre de manière à résister aux chocs mécaniques de la montre, qui peut être une montre à sonnerie ou musicale.The object of the invention is therefore to overcome the drawbacks of the aforementioned state of the art by proposing a frequency tuning method for a set of plates of a watch, in particular forming a dial of a watch so as to resist the mechanical shocks of the watch, which can be a striking or musical watch.
A cet effet, l'invention concerne un procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre, qui comprend les caractéristiques de la revendication indépendante 1.To this end, the invention relates to a method for frequency tuning a set of plates of a watch, which comprises the characteristics of
Des étapes particulières du procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre sont définies dans les revendications dépendantes 2 à 10.Particular steps of the method for frequency tuning a set of plates of a watch are defined in
Un avantage du procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre réside dans le fait qu'au moins deux plaques formant cadran peuvent être accordées pour améliorer leur résistance aux chocs mécaniques. De préférence, chaque plaque formant cadran peut aussi jouer le rôle de membrane de rayonnement acoustique pour une montre à sonnerie ou musicale. Chaque plaque est accordée en fréquence, notamment en contrôlant par exemple le premier mode propre de vibration. Les deux plaques espacées l'une de l'autre d'une distance définie relativement faible, sont donc accordées de telle manière à ne pas venir en contact l'une contre l'autre suite à un choc mécanique de la montre. Suite à l'accordage fréquentiel des plaques, dont une des plaques est réalisée en matériau fragile, tel que du saphir, les deux plaques sont susceptibles de vibrer en phase de manière à ne pas venir en contact l'une contre l'autre lors d'un choc mécanique. Il peut également servir à améliorer le rayonnement acoustique d'une note ou d'une musique générée par la montre à sonnerie ou musicale.An advantage of the frequency tuning method for a set of plates of a watch lies in the fact that at least two plates forming a dial can be tuned to improve their resistance to mechanical shocks. Preferably, each plate forming a dial can also act as an acoustic radiation membrane for a striking or musical watch. Each plate is tuned in frequency, in particular by controlling for example the first natural mode of vibration. The two plates, spaced apart from each other by a relatively small defined distance, are therefore tuned in such a way as not to come into contact against each other following a mechanical shock to the watch. Following the frequency tuning of the plates, one of the plates of which is made of fragile material, such as sapphire, the two plates are likely to vibrate in phase so as not to come into contact against each other during a mechanical shock. It can also be used to improve the acoustic radiation of a note or music generated by the striking or musical watch.
Avantageusement une première plaque de cadran est en matériau métallique, alors qu'une seconde plaque de cadran est en saphir, qui est un matériau dur fragile et cassant. Dans la boîte de montre, la plaque saphir peut être d'une épaisseur égale à 0.4 mm, voire inférieure.Advantageously, a first dial plate is made of metallic material, while a second dial plate is made of sapphire, which is a brittle and brittle hard material. In the watch case, the sapphire plate can be of a thickness equal to 0.4 mm, or even less.
Avantageusement, la plaque saphir peut faire office d'un second cadran permettant d'apporter des nouveaux codes esthétiques ou elle peut aussi jouer le rôle de membrane vibrante et rayonnante en coopération avec la première plaque cadran dans le cas d'une montre à sonnerie ou musicale.Advantageously, the sapphire plate can act as a second dial making it possible to introduce new aesthetic codes or it can also act as a vibrating and radiating membrane in cooperation with the first dial plate in the case of a striking watch or musical.
A cet effet, l'invention concerne également une montre comprenant l'ensemble de plaques accordées selon le procédé d'accordage, qui comprend les caractéristiques de la revendication indépendante 11.To this end, the invention also relates to a watch comprising the set of plates tuned according to the tuning method, which includes the characteristics of independent claim 11.
Les buts, avantages et caractéristiques du procédé d'accordage fréquentiel d'un ensemble de plaques formant cadran d'une montre apparaîtront mieux dans la description suivante notamment en regard des dessins sur lesquels :
- la
figure 1 représente une coupe transversale d'une montre par exemple à sonnerie ou musicale avec un ensemble de plaques formant cadran et espacées l'une de l'autre et accordées en fréquence pour améliorer la résistance aux chocs mécaniques selon l'invention, - la
figure 2 représente une coupe transversale de la déformée du premier mode propre d'au moins une plaque de l'ensemble de plaques formant cadran selon l'invention, - les
figures 3a et 3b représentent deux graphiques de l'ensemble de plaques formant cadran en vibration suite à un choc mécanique ou lors d'une sonnerie ou d'une musique avant et après l'accordage fréquentiel de l'ensemble de plaques selon l'invention, et - la
figure 4 représente un modèle numérique pour la détermination de fréquences de vibration et l'accordage fréquentiel de l'ensemble de plaques d'une montre selon l'invention.
- the
figure 1 represents a cross section of a watch, for example a chiming or musical watch, with a set of plates forming a dial and spaced apart from each other and tuned in frequency to improve the resistance to mechanical shocks according to the invention, - the
picture 2 - them
figures 3a and 3b represent two graphs of the set of plates forming a dial in vibration following a mechanical shock or during a ringing or music before and after the frequency tuning of the set of plates according to the invention, and - the
figure 4 represents a digital model for the determination of vibration frequencies and the frequency tuning of the set of plates of a watch according to the invention.
Dans la description suivante, toutes les parties bien connues d'une montre par exemple d'une montre à sonnerie ou musicale ne seront décrites que sommairement. Il sera exclusivement fait référence au procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre pour améliorer la résistance aux chocs mécaniques que peut supporter la montre et l'ensemble de plaques.In the following description, all the well-known parts of a watch, for example a striking or musical watch, will only be briefly described. Reference will be made exclusively to the method of frequency tuning a set of plates of a watch to improve the resistance to mechanical shocks that the watch and the set of plates can withstand.
La
Bien entendu, il doit être compris que l'ensemble de plaques peut se trouver à un autre endroit dans la boîte de montre s'en servir forcément comme un ensemble de plaques formant cadran. Il peut s'agir de deux plaques espacées l'une de l'autre formant une partie de la carrure 2 de boîte de montre, ou une partie du fond 8 de la boîte de montre par exemple ou un autre endroit de la boîte de montre.Of course, it must be understood that the set of plates can be located in another place in the watch case, necessarily using it as a set of plates forming a dial. It may be two plates spaced apart from each other forming part of the
L'ensemble de plaques 4, 5 formant cadran comprend une première plaque cadran 4 par exemple réalisée dans un matériau métallique et au-dessus de cette première plaque cadran 4, une seconde plaque 5 en matériau dur fragile, par exemple réalisée en saphir ou autre matériau fragile. De préférence, la seconde plaque 5 est sensiblement transparente de manière à pouvoir visionner les incrustations esthétiques ou des index sur la surface inférieure de la seconde plaque 5, voire également sur la surface supérieure de la première plaque 4.The set of
Les deux plaques 4, 5 sont montées espacées l'une de l'autre d'une distance définie. Par exemple, il peut être prévu une distance égale ou inférieure à 1 mm entre les deux plaques 4, 5. De préférence, la distance séparant les plaques 4, 5 peut être bien inférieure à 1 mm, par exemple à 0.1 mm dans le but de ne pas perdre trop de place dans la boîte de montre 1. Toutefois, les plaques 4, 5 distantes l'une de l'autre doivent être configurées pour ne pas venir en contact l'une de l'autre lors de chocs mécaniques. Il est donc effectué un procédé d'accordage fréquentiel pour pouvoir adapter la fréquence de vibration sur au moins le premier mode propre de vibration de l'une et de l'autre des plaques 4, 5 comme discuté dans la suite de la description.The two
Il est à noter que lors d'un choc mécanique, les éléments qui constituent l'habillage et le mouvement de la montre 1 subissent de fortes accélérations. L'ensemble de plaques 4, 5 formant cadran, sous cette accélération, se déforme et peut potentiellement rentrer en contact avec les pièces voisines comme par exemple les aiguilles 6. Dans le cas particulier de la construction de la présente invention, une plaque en saphir 5 peut être ajoutée espacée à une plaque cadran 4 pour des codes esthétiques et peut venir en contact de la plaque cadran 4 lors d'un choc mécanique. En fonction de la hauteur de chute de l'habillage, la première plaque cadran 4 de l'ensemble peut entrer en contact avec la seconde plaque saphir 5, ce qui peut provoquer une rupture de cette seconde plaque saphir 5 comme il s'agit d'un matériau fragile. Pour garantir une tenue aux chocs mécaniques des montres, qui comprennent l'ensemble de plaques 4, 5, il est nécessaire de dimensionner correctement tous les éléments qui composent la montre. Cependant, l'esthétique de la montre engendre des contraintes, qui sont parfois incompatibles avec une construction garantissant une bonne résistance mécanique lors d'un choc mécanique.It should be noted that during a mechanical shock, the elements which constitute the casing and the movement of the
Le saphir étant un matériau fragile, il est préférable d'éviter tout choc direct sur ce type de matière. Dans la montre 1 à ensemble de plaques 4, 5, et pour éviter tout contact entre les deux plaques 4, 5, il existe plusieurs possibilités, qui sont de :
- Augmenter la raideur de la première plaque cadran 4 pour éviter qu'elle se déforme. La première plaque cadran 4 est un élément esthétique, décoré et souvent réalisé avec des matériaux nobles et très denses. Il est donc nécessaire que la première plaque cadran 4 ait une épaisseur conséquente pour éviter qu'elle ne se déforme. Cependant, cela augmenterait l'épaisseur totale de l'habillage ce qui n'est pas souhaité.
- Augmenter l'ébat entre la première plaque cadran 4 et la seconde
plaque saphir 5. La première plaque cadran 4 pourrait se déformer lors du choc mécanique sans pour autant rentrer en contact avec l'autre secondeplaque 5 qui vibrerait aussi. L'augmentation de la distance entre la première plaque cadran 4 et la secondeplaque saphir 5 joue directement sur l'épaisseur de l'habillage et sur l'esthétique de la montre. La lisibilité du cadran pourrait aussi être péjoré. - Accorder les fréquences propres de la première plaque cadran 4 et celles de la seconde
plaque 5 en saphir pour que la première plaque cadran 4 et la secondeplaque saphir 5 vibrent en phase et ne s'entrechoquent pas sans augmenter l'ébat entre les deux éléments fixés par le design.
- Increase the stiffness of the
first dial plate 4 to prevent it from deforming. Thefirst dial plate 4 is an aesthetic element, decorated and often made with noble and very dense materials. It is therefore necessary for thefirst dial plate 4 to have a substantial thickness to prevent it from deforming. However, this would increase the overall thickness of the skin which is not desired. - Increase the play between the
first dial plate 4 and thesecond sapphire plate 5. Thefirst dial plate 4 could be deformed during the mechanical shock without however coming into contact with the othersecond plate 5 which would also vibrate. The increase in the distance between thefirst dial plate 4 and thesecond sapphire plate 5 has a direct effect on the thickness of the casing and on the aesthetics of the watch. The readability of the dial could also be impaired. - Tuning the natural frequencies of the
first dial plate 4 and those of thesecond sapphire plate 5 so that thefirst dial plate 4 and thesecond sapphire plate 5 vibrate in phase and do not collide without increasing the movement between the two elements set by design.
Il est à noter que la présente invention, se base principalement sur le dernier point de la liste citée ci-dessus. Il a donc été développé un modèle numérique pour prédire la dynamique de la première plaque cadran 4 et de la seconde plaque 5 en saphir lors d'un choc subit par l'habillage. La première plaque cadran 4 et la seconde plaque saphir 5 sont représentées par des systèmes masse-ressort-amortisseur comme montrés à la
Les
Pour le procédé d'accordage fréquentiel, la vibration de chaque plaque 4, 5 est contrôlée suite à un choc mécanique généré par un appareil de test sur lequel la ou les plaques 4, 5 sont placées superposées l'une au-dessus de l'autre avec un espace déterminé entre les deux plaques. En fonction de la vibration de chaque plaque, il peut être constaté si une plaque rentre en contact de l'autre plaque, ce qui est le cas représenté à la
À titre de rappel suite à cette étape du procédé montré à la
Pour l'adaptation de fréquence de vibration des plaques, il peut être prévu d'agir sur au moins une des plaques en lui ajoutant une masse à une position déterminée, par exemple en son centre, pour avoir une même déformation en phase que l'autre plaque en vibration. La masse ajoutée peut être chassée au centre de la seconde plaque. Il peut être aussi imaginé de rajouter plusieurs petites masselottes à différents endroits de la plaque.For the adaptation of the vibration frequency of the plates, it can be provided to act on at least one of the plates by adding a mass to it. a determined position, for example in its center, to have the same deformation in phase as the other vibrating plate. The added mass can be driven into the center of the second plate. It can also be imagined to add several small weights at different places of the plate.
Il est encore imaginable de modifier la raideur ou conditions aux limites de l'ensemble de plaques ou d'au moins une des plaques pour éviter tout contact de chaque plaque l'une contre l'autre suite à un choc mécanique. Bien entendu, au lieu d'ajouter une masse ou modifier la raideur, il peut aussi être prévu d'agir sur une des plaques au moyen d'un laser pour effectuer une gravure locale ou retrait de matière pour modifier la fréquence de vibration jusqu'à avoir une fréquence de vibration au moins des premiers modes de vibration égale pour les deux plaques. Grâce à cela, il est possible d'espacer les deux plaques d'une distance définie faible, par exemple à 0.1 mm l'une de l'autre, tout en garantissant qu'elles n'entrent pas en contact l'une contre l'autre suite à un choc mécanique.It is still conceivable to modify the stiffness or boundary conditions of the set of plates or of at least one of the plates to avoid any contact of each plate against each other following a mechanical shock. Of course, instead of adding a mass or modifying the stiffness, it can also be provided to act on one of the plates by means of a laser to carry out a local engraving or removal of material to modify the vibration frequency up to to have a frequency of vibration at least of the first modes of equal vibration for the two plates. Thanks to this, it is possible to space the two plates by a small defined distance, for example 0.1 mm from each other, while ensuring that they do not come into contact against each other. another following a mechanical shock.
Il est à noter que pour la configuration de l'une ou l'autre des plaques 4, 5, il peut être utilisé un modèle numérique développé (
Il est nécessaire de caractériser les fréquences propres du cadran et celles de la plaque saphir (car elles dépendent des tolérances de fabrication de ces composants) pour ajuster au cas par cas la masse ajoutée au centre de la plaque en saphir.It is necessary to characterize the natural frequencies of the dial and those of the sapphire plate (because they depend on the manufacturing tolerances of these components) to adjust the mass added to the center of the sapphire plate on a case-by-case basis.
L'appareil de test de fréquences pour l'accordage fréquentiel du procédé ne sera pas décrit plus en détail, car les éléments composant l'appareil sont déjà connus pour d'autres domaines.The frequency test apparatus for the frequency tuning of the method will not be described in more detail, since the elements making up the apparatus are already known for other fields.
Comme précisé précédemment, l'ensemble de plaques formant cadran peut aussi servir comme des membranes de rayonnement acoustique d'une montre à sonnerie ou musicale et pour lequel il est cherché d'accorder lesdites plaques ou membranes de manière à ce qu'elles vibrent en phase sans venir en contact l'une contre l'autre.As specified above, the set of plates forming a dial can also serve as acoustic radiation membranes of a striking or musical watch and for which it is sought to tune said plates or membranes so that they vibrate in phase without coming into contact with each other.
À titre illustratif, la
A partir de la description qui vient d'être faite, plusieurs variantes du procédé d'accordage fréquentiel d'un ensemble de plaques d'une montre peuvent être conçues par l'homme du métier sans sortir du cadre de l'invention définie par les revendications.From the description which has just been given, several variants of the frequency tuning method of a set of plates of a watch can be designed by those skilled in the art without departing from the scope of the invention defined by the claims.
Claims (11)
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
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EP21182417.2A EP4113219A1 (en) | 2021-06-29 | 2021-06-29 | Method for frequency tuning of an assembly of plates of a watch, and watch comprising the assembly of tuned plates |
US17/663,119 US11978427B2 (en) | 2021-06-29 | 2022-05-12 | Method for frequency tuning a set of plates of a watch, and watch comprising the set of tuned plates |
JP2022085803A JP7337999B2 (en) | 2021-06-29 | 2022-05-26 | Method for frequency adjustment to plate set of watch and watch with adjusted plate set |
CN202210748860.8A CN115542706A (en) | 2021-06-29 | 2022-06-29 | Method for frequency tuning a set of plates of a watch and watch comprising such a set of tuned plates |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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EP21182417.2A EP4113219A1 (en) | 2021-06-29 | 2021-06-29 | Method for frequency tuning of an assembly of plates of a watch, and watch comprising the assembly of tuned plates |
Publications (1)
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EP4113219A1 true EP4113219A1 (en) | 2023-01-04 |
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EP21182417.2A Pending EP4113219A1 (en) | 2021-06-29 | 2021-06-29 | Method for frequency tuning of an assembly of plates of a watch, and watch comprising the assembly of tuned plates |
Country Status (4)
Country | Link |
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US (1) | US11978427B2 (en) |
EP (1) | EP4113219A1 (en) |
JP (1) | JP7337999B2 (en) |
CN (1) | CN115542706A (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
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GB2234369A (en) * | 1989-07-27 | 1991-01-30 | Fuji Keiki Co Ltd | Rotatable reference watchglass watch |
EP1795978A2 (en) | 2005-12-07 | 2007-06-13 | Lange Uhren GmbH | Timepiece |
EP3009894A1 (en) | 2014-10-15 | 2016-04-20 | Montres Breguet SA | Arrangement with sound-projecting membranes for a chiming watch |
Family Cites Families (9)
Publication number | Priority date | Publication date | Assignee | Title |
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JPS5493391A (en) * | 1977-12-30 | 1979-07-24 | Seiko Instr & Electronics Ltd | Small sized audio unit |
JPS564087A (en) * | 1979-06-26 | 1981-01-16 | Citizen Watch Co Ltd | Sound emitting body for electromagnetic watch |
US4233679A (en) * | 1979-09-28 | 1980-11-11 | Timex Corporation | Adjustable piezoelectric transducer for a watch |
FR2726127B1 (en) * | 1994-10-19 | 1996-11-29 | Asulab Sa | MINIATURIZED ANTENNA FOR CONVERTING AN ALTERNATIVE VOLTAGE TO A MICROWAVE AND VICE-VERSA, PARTICULARLY FOR WATCHMAKING APPLICATIONS |
EP2461219B1 (en) | 2010-12-02 | 2020-10-14 | Montres Breguet SA | Acoustic membrane for a musical box or an alarm watch |
CH704183A2 (en) * | 2010-12-02 | 2012-06-15 | Montres Breguet Sa | Acoustic radiation membrane for e.g. music watch, has cavities or projecting portions formed in form of honeycomb, where shape and dimensions of cavities are adapted based on type of material as well as notes to be radiated by membrane |
KR101575800B1 (en) * | 2014-08-19 | 2015-12-08 | 주식회사 이노칩테크놀로지 | Piezoelectric device and electronic device having the same |
EP3644132B1 (en) * | 2018-10-26 | 2022-06-08 | Blancpain SA | Striking or musical watch with at least one acoustic radiation membrane, and method of manufacturing said membrane |
EP3696618A1 (en) * | 2019-02-14 | 2020-08-19 | Montres Breguet S.A. | Chiming or musical watch with arrangement for guiding the acoustic waves |
-
2021
- 2021-06-29 EP EP21182417.2A patent/EP4113219A1/en active Pending
-
2022
- 2022-05-12 US US17/663,119 patent/US11978427B2/en active Active
- 2022-05-26 JP JP2022085803A patent/JP7337999B2/en active Active
- 2022-06-29 CN CN202210748860.8A patent/CN115542706A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2234369A (en) * | 1989-07-27 | 1991-01-30 | Fuji Keiki Co Ltd | Rotatable reference watchglass watch |
EP1795978A2 (en) | 2005-12-07 | 2007-06-13 | Lange Uhren GmbH | Timepiece |
EP3009894A1 (en) | 2014-10-15 | 2016-04-20 | Montres Breguet SA | Arrangement with sound-projecting membranes for a chiming watch |
Also Published As
Publication number | Publication date |
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CN115542706A (en) | 2022-12-30 |
US20220415294A1 (en) | 2022-12-29 |
JP2023007417A (en) | 2023-01-18 |
JP7337999B2 (en) | 2023-09-04 |
US11978427B2 (en) | 2024-05-07 |
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