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EP1795978B1 - Timepiece - Google Patents

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Publication number
EP1795978B1
EP1795978B1 EP06022988A EP06022988A EP1795978B1 EP 1795978 B1 EP1795978 B1 EP 1795978B1 EP 06022988 A EP06022988 A EP 06022988A EP 06022988 A EP06022988 A EP 06022988A EP 1795978 B1 EP1795978 B1 EP 1795978B1
Authority
EP
European Patent Office
Prior art keywords
membrane
timepiece according
clamping ring
radially
clamping
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
EP06022988A
Other languages
German (de)
French (fr)
Other versions
EP1795978A3 (en
EP1795978A2 (en
Inventor
Robert Alain Greubel
Stephen Edward Methuen Forsey
Ludovic Philippe Roland Perez
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.)
Lange Uhren GmbH
Original Assignee
Lange Uhren GmbH
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 Lange Uhren GmbH filed Critical Lange Uhren GmbH
Publication of EP1795978A2 publication Critical patent/EP1795978A2/en
Publication of EP1795978A3 publication Critical patent/EP1795978A3/en
Application granted granted Critical
Publication of EP1795978B1 publication Critical patent/EP1795978B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00Cases
    • G04B37/0075Cases with means to enhance sound transmission
    • GPHYSICS
    • G04HOROLOGY
    • G04BMECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B37/00Cases
    • G04B37/08Hermetic sealing of openings, joints, passages or slits
    • G04B37/11Hermetic sealing of openings, joints, passages or slits of the back cover of pocket or wrist watches

Definitions

  • the invention relates to a clock, in particular a wristwatch, with a housing whose housing interior observer has an opening closed by a cover glass and the bottom side has a sound opening which is closed by a membrane, which with its radially peripheral edge region close to a corresponding annular surface of the Housing is in Appendix, with a arranged in the housing interior vibrator, can be generated by the sound vibrations.
  • the membrane ensures that the housing interior, in which the movement and the vibrator are located, is closed to the outside to prevent ingress of dirt and moisture.
  • a clock of the aforementioned type is known in which the radially encircling edge of the membrane in an axial receiving opening of the watch case can be used until it rests against an annular shoulder and axially clamped by a axially screwed on the housing clamping ring against the annular shoulder.
  • the circular outer diameter of the membrane corresponds to the inner diameter of the receiving opening.
  • a wristwatch which has in its bottom region a chamber in which a battery-powered vibrator is arranged. From the chamber go out to the outside leading openings.
  • the chamber together with the openings forms a Helmholtz resonator whose natural frequency corresponds to the frequency of the vibrator, which leads to an amplification of the sound generated by the vibrator.
  • the object of the invention is therefore to provide a clock of the type mentioned, in which there is an optimized transmission of the sound vibrations of the vibrator to the outside.
  • This object is achieved in that the radially encircling edge of the membrane of a pulling device is radially outwardly zugbelastbar.
  • a tensile load is possible in a simple manner when the radially encircling edge of the membrane is tightly connected to a clamping ring, which can be tensioned radially outwardly by the pulling device, wherein preferably the radially encircling edge of the membrane is connected by a non-detachable connection with the clamping ring.
  • the membrane can first be connected to the clamping ring with a certain basic tension and thus a certain natural frequency, before a fine adjustment is then made by the pulling device.
  • a tight and firm connection of the membrane with the clamping ring is possible in that the membrane is connected by soldering or welding, in particular by laser welding with the clamping ring.
  • the laser welding has the additional advantage that a heat load only in the immediate welding area but not in the natural frequency-determining free-stretched area of the membrane he follows. A heat-related change in the natural frequency of the membrane is thus avoided.
  • Another dense and firm connection of the membrane with the clamping ring while avoiding heat influence of the membrane is that the membrane is adhesively bonded to the clamping ring.
  • the membrane can also be clamped between two clamping ring parts which can be connected to one another, which are preferably axially tensioned against one another by means of screws.
  • a sealing ring may be arranged in a radially circumferentially formed groove in the annular surface, on which the membrane or the clamping ring is in axial contact.
  • clamping screws For tight loading of the annular surface by the clamping ring and its fixation of the clamping ring can be tensioned by means of clamping screws against the annular surface, which are screwed into axial threaded holes of the housing and with its screw head on the clamping ring in circulation.
  • the clamping screws are preferably evenly distributed around the clamping ring for even investment.
  • the pulling device may consist in that in the clamping ring radially directed and radially outwardly opening threaded bores are formed, can be screwed into the lag screws, which are supported on the housing against radial inward movement.
  • an adjustment of the natural frequency of the membrane can be carried out in the built-in housing state, so that installation-related changes in the natural frequency of the membrane can not arise.
  • the large stage opens radially outward and at the transition from the large step to the small stage, the lag screw is supported with its screw head.
  • a clamping element axially acted upon, wherein the clamping element acts on the membrane in its radially outer peripheral edge region axially Clamping ring, which allows a uniform radial circumferential loading of the membrane.
  • the clamping element can be axially adjustable by means of adjusting screws.
  • the membrane is preferably covered by a housing bottom fastened to the housing, between the membrane and the housing bottom a space is formed, lead from the sound outlet openings in particular radially outward.
  • the membrane is a metal membrane, which may possibly consist of a corrosion-resistant material, in particular of gold or a gold alloy.
  • a good range of sound vibrations can be achieved by virtue of the fact that the oscillator is a bell which can be hit by a stop hammer or a gong which preferably consists of a metal.
  • the vibration generator consists of niobium (Nb) or a niobium (Nb) -containing alloy.
  • the partial sections of a clock shown in the figures show a housing 1 of the clock whose housing interior 2 has a sound opening 3 which is closed by a metallic membrane 10.
  • a radially encircling annular surface 4 is arranged on the housing 1 in the edge region of the sound opening 3, which extends radially to the sound opening 3 and in which a radially encircling groove 5 is formed.
  • a sealing ring 6 is arranged, which protrudes partially from the groove 5.
  • a clamping ring 7, 7 ' On the annular surface and the sealing ring 6 is a clamping ring 7, 7 'with an approximately rectangular cross section firmly in circulation.
  • the membrane 10 is fixed by laser welding and covers the opening of the clamping ring 7, 7' from.
  • two bells 8, 8 'of a vibrator are arranged centrally, which can be engaged by a stop hammer, not shown, for generating sound vibrations.
  • the membrane 10 is covered to the outside by a cup-shaped housing bottom 11 connected to the housing 1, wherein a space 12 is formed between the membrane 10 and the housing bottom 11, from which sound outlet openings 13 lead radially outward.
  • the space 12 and the sound outlet openings 13 form a Helmholtz resonator.
  • threaded holes 14 are formed, which are closed radially inwardly.
  • stepped holes 15 are formed in the housing 1, whose small steps 16 open radially inward and their large steps 17 radially outward.
  • tension screws 18 are introduced radially from the outside and screwed with their threaded shank in the threaded holes 14.
  • the lag screws 18 are based on the transition from the large step 17 to the small step 16.
  • the lag screws 18 in the threaded holes 14 of the clamping ring 7 is stretched radially outwards and thus the membrane 10 radially stretched, so that their natural frequency is changed.
  • the membrane 10 has a radial stress at the desired natural frequency.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Electromechanical Clocks (AREA)
  • Apparatuses For Generation Of Mechanical Vibrations (AREA)
  • Electric Clocks (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)

Description

Die Erfindung bezieht sich auf eine Uhr, insbesondere eine Armbanduhr, mit einem Gehäuse, dessen Gehäuseinnenraum beobachterseitig eine durch ein Deckglas verschlossene Öffnung und bodenseitig eine Schallöffnung besitzt, die durch eine Membran verschlossen ist, welche mit ihrem radial umlaufenden Randbereich dicht an einer entsprechenden Ringfläche des Gehäuses in Anlage ist, mit einem in dem Gehäuseinnenraum angeordneten Schwingungserzeuger, durch den Tonschwingungen erzeugbar sind.The invention relates to a clock, in particular a wristwatch, with a housing whose housing interior observer has an opening closed by a cover glass and the bottom side has a sound opening which is closed by a membrane, which with its radially peripheral edge region close to a corresponding annular surface of the Housing is in Appendix, with a arranged in the housing interior vibrator, can be generated by the sound vibrations.

Bei derartigen Uhren sorgt die Membran dafür, daß der Gehäuseinnenraum, in dem sich das Uhrwerk und der Schwingungserzeuger befinden, nach außen verschlossen ist, um ein Eindringen von Schmutz und Feuchtigkeit zu verhindern.In such watches, the membrane ensures that the housing interior, in which the movement and the vibrator are located, is closed to the outside to prevent ingress of dirt and moisture.

Gleichzeitig soll durch die Schwingungsfähigkeit der Membran eine gute Übertragung der von dem Schwingungserzeuger erzeugten Tonschwingungen nach außen gewährleistet werden.At the same time a good transmission of the sound vibrations generated by the vibrator to be ensured by the vibration of the membrane to the outside.

Diese Übertragung der Tonschwingungen nach außen erfolgt aber nur dann optimal, wenn die Frequenz der von dem Schwingungserzeuger erzeugten Tonschwingungen und die Eigenfrequenz der Membran gleich sind.However, this transmission of the sound vibrations to the outside is optimal only if the frequency of the sound vibrations generated by the vibration generator and the natural frequency of the membrane are the same.

Aus der CH 323 231 A ist eine Uhr der eingangs genannten Art bekannt, bei der der radial umlaufende Rand der Membran in einer axialen Aufnahmeöffnung des Uhrgehäuses bis zur Anlage an einer Ringschulter einsetzbar und über einen am Gehäuse axial einschraubbaren Spannring axial gegen die Ringschulter spannbar ist. Der kreisförmige Außendurchmesser der Membran entspricht dabei dem Innendurchmesser der Aufnahmeöffnung.From the CH 323 231 A a clock of the aforementioned type is known in which the radially encircling edge of the membrane in an axial receiving opening of the watch case can be used until it rests against an annular shoulder and axially clamped by a axially screwed on the housing clamping ring against the annular shoulder. The circular outer diameter of the membrane corresponds to the inner diameter of the receiving opening.

Aus der US-A-4 216 650 ist eine Armbanduhr bekannt, die in ihrem Bodenbereich eine Kammer aufweist, in der ein batteriebetriebener Schwingungserzeuger angeordnet ist. Von der Kammer gehen nach außen führende Öffnungen aus. Dabei bildet die Kammer zusammen mit den Öffnungen einen Helmholz- Resonator, dessen natürliche Frequenz der Frequenz des Schwingungserzeugers entspricht, was zu einer Verstärkung des von dem Schwingungserzeuger erzeugten Tons führt.From the US-A-4,216,650 a wristwatch is known which has in its bottom region a chamber in which a battery-powered vibrator is arranged. From the chamber go out to the outside leading openings. In this case, the chamber together with the openings forms a Helmholtz resonator whose natural frequency corresponds to the frequency of the vibrator, which leads to an amplification of the sound generated by the vibrator.

Aufgabe der Erfindung ist es daher eine Uhr der eingangs genannten Art zu schaffen, bei der eine optimierte Übertragung der Tonschwingungen des Schwingungserzeugers nach außen erfolgt.The object of the invention is therefore to provide a clock of the type mentioned, in which there is an optimized transmission of the sound vibrations of the vibrator to the outside.

Diese Aufgabe wird erfindungsgemäß dadurch gelöst, daß der radial umlaufende Rand der Membran von einer Zugeinrichtung radial nach außen zugbelastbar ist.This object is achieved in that the radially encircling edge of the membrane of a pulling device is radially outwardly zugbelastbar.

Durch diese Ausbildung ist es möglich die Spannung der Membran zu verändern und damit die Eigenfrequenz der Membran auf die Frequenz der von dem Schwingungserzeuger erzeugten Tonschwingungen einzustellen. Damit können diese Tonschwingungen optimiert aus dem Gehäuseinnenraum nach außen übertragen werden, so daß eine Brillianz der erzeugten Tonschwingungen weitestgehend keine Beeinträchtigung bei der Übertragung nach außen erleidet.By this design, it is possible to change the voltage of the membrane and thus adjust the natural frequency of the membrane to the frequency of the sound vibrations generated by the vibrator. Thus, these sound vibrations can be optimally transmitted out of the housing interior to the outside, so that a brilliance of the generated sound vibrations largely suffered no impairment in the transmission to the outside.

Toleranzbedingte Schwankungen der Tonschwingungen des Schwingungserzeugers sind ebenfalls ausgleichbar.Tolerance-related fluctuations in the sound vibrations of the vibrator are also compensated.

Eine Zugbelastung ist auf einfache Weise möglich, wenn der radial umlaufende Rand der Membran dicht mit einem Spannring verbunden ist, der durch die Zugeinrichtung radial nach außen zugbelastbar ist, wobei vorzugsweise der radial umlaufende Rand der Membran durch eine nichtlösbare Verbindung mit dem Spannring verbunden ist..A tensile load is possible in a simple manner when the radially encircling edge of the membrane is tightly connected to a clamping ring, which can be tensioned radially outwardly by the pulling device, wherein preferably the radially encircling edge of the membrane is connected by a non-detachable connection with the clamping ring. ,

Ist die Membran unter einer bestimmten radialen Vorspannung mit dem Spannring verbunden, so kann zunächst die Membran einfach mit einer bestimmten Grundspannung und somit einer bestimmten Eigenfrequenz mit dem Spannring verbunden werden, ehe dann durch die Zugeinrichtung eine Feineinstellung erfolgt.If the membrane is connected to the clamping ring under a certain radial pretension, the membrane can first be connected to the clamping ring with a certain basic tension and thus a certain natural frequency, before a fine adjustment is then made by the pulling device.

Eine dichte und feste Verbindung der Membran mit dem Spannring ist dadurch möglich, daß die Membran durch Löten oder Schweißen, insbesondere durch Laserschweißen mit dem Spannring verbunden ist.A tight and firm connection of the membrane with the clamping ring is possible in that the membrane is connected by soldering or welding, in particular by laser welding with the clamping ring.

Dabei besitzt das Laserschweißen den zusätzlichen Vorteil, daß eine Wärmebelastung nur im unmittelbaren Schweißbereich nicht aber in dem die Eigenfrequenz bestimmenden frei gespannten Bereich der Membran erfolgt. Eine wärmebedingte Veränderung der Eigenfrequenz der Membran wird so vermieden.In this case, the laser welding has the additional advantage that a heat load only in the immediate welding area but not in the natural frequency-determining free-stretched area of the membrane he follows. A heat-related change in the natural frequency of the membrane is thus avoided.

Eine andere dichte und feste Verbindung der Membran mit dem Spannring unter Vermeidung einer Wärmebeeinflußung der Membran besteht darin, daß die Membran durch Kleben mit dem Spannring verbunden ist.Another dense and firm connection of the membrane with the clamping ring while avoiding heat influence of the membrane is that the membrane is adhesively bonded to the clamping ring.

Die Membran kann aber auch zwischen zwei miteinander verbindbaren Spannringteilen eingeklemmt sein, die vorzugsweise durch Schrauben axial gegeneinander spannbar sind.However, the membrane can also be clamped between two clamping ring parts which can be connected to one another, which are preferably axially tensioned against one another by means of screws.

Zur Abdichtung des Verbindungsbereichs der Membran oder des Spannrings mit dem Gehäuse kann in einer in der Ringfläche radial umlaufend ausgebildeten Nut ein Dichtring angeordnet sein, an dem die Membran oder der Spannring axial in Anlage ist.To seal the connecting region of the membrane or the clamping ring with the housing, a sealing ring may be arranged in a radially circumferentially formed groove in the annular surface, on which the membrane or the clamping ring is in axial contact.

Zum festen Beaufschlagen der Ringfläche durch den Spannring und zu dessen Fixierung kann der Spannring mittels Spannschrauben gegen die Ringfläche spannbar sein, die in axiale Gewindebohrungen des Gehäuses einschraubbar sind und mit ihrem Schraubenkopf auf dem Spannring in Auflage sind. Dabei sind zur gleichmäßigen Anlage vorzugsweise die Spannschrauben um den Spannring herum gleichmäßig verteilt angeordnet.For tight loading of the annular surface by the clamping ring and its fixation of the clamping ring can be tensioned by means of clamping screws against the annular surface, which are screwed into axial threaded holes of the housing and with its screw head on the clamping ring in circulation. In this case, the clamping screws are preferably evenly distributed around the clamping ring for even investment.

Die Zugeinrichtung kann darin bestehen, daß in dem Spannring radial gerichtete und radial nach außen mündende Gewindebohrungen ausgebildet sind, in die Zugschrauben einschraubbar sind, die an dem Gehäuse gegen radiale Einwärtsbewegung abstützbar sind.The pulling device may consist in that in the clamping ring radially directed and radially outwardly opening threaded bores are formed, can be screwed into the lag screws, which are supported on the housing against radial inward movement.

Damit kann eine Einstellung der Eigenfrequenz der Membran im in das Gehäuse eingebauten Zustand erfolgen, so daß einbaubedingte Veränderungen der Eigenfrequenz der Membran nicht entstehen können.Thus, an adjustment of the natural frequency of the membrane can be carried out in the built-in housing state, so that installation-related changes in the natural frequency of the membrane can not arise.

In einfacher Ausbildung sind dabei die Zugschrauben in zu den Gewindebohrungen koaxialen Stufenbohrungen angeordnet, deren große Stufe radial nach außen mündet und an deren Übergang von der großen Stufe zur kleinen Stufe die Zugschraube mit ihrem Schraubenkopf abgestützt ist.In a simple training while the lag screws are arranged in the threaded holes coaxial stepped holes, the large stage opens radially outward and at the transition from the large step to the small stage, the lag screw is supported with its screw head.

Eine weitere Möglichkeit zur Ausbildung der Zugeinrichtung besteht darin, daß die Membran in ihrem radial äußeren Randbereich durch ein Spannelement axial verstellbar beaufschlagbar ist, wobei das Spannelement ein die Membran in ihrem radial äußeren umlaufenden Randbereich axial beaufschlagender Spannring, was eine gleichmäßige radial umlaufende Beaufschlagung der Membran ermöglicht.Another possibility for forming the traction device is that the membrane in its radially outer edge region by a clamping element axially acted upon, wherein the clamping element acts on the membrane in its radially outer peripheral edge region axially Clamping ring, which allows a uniform radial circumferential loading of the membrane.

Zum einfachen Einstellen des Spannrings kann das Spannelement mittels Stellschrauben axial verstellbar sein.For easy adjustment of the clamping ring, the clamping element can be axially adjustable by means of adjusting screws.

Zum Schutz der Membran gegen Beschädigungen und gleichzeitig gutem Austreten der Tonschwingungen nach außen ist vorzugsweise die Membran von einem an dem Gehäuse befestigbaren Gehäuseboden abgedeckt, wobei zwischen Membran und Gehäuseboden ein Raum gebildet ist, von dem Schallaustrittsöffungen insbesondere radial nach außen führen.To protect the membrane against damage and at the same time good exit of the sound vibrations to the outside, the membrane is preferably covered by a housing bottom fastened to the housing, between the membrane and the housing bottom a space is formed, lead from the sound outlet openings in particular radially outward.

Zu einer deutlichen Verstärkung des nach außen abgegebenen Tons der Tonschwingungen führt es, wenn der Raum und die Schallaustrittsöffnungen einen Helmholtz-Resonator bilden.It leads to a significant amplification of the sound emitted to the outside of the sound vibrations, when the space and the sound outlet openings form a Helmholtz resonator.

Vorzugsweise ist die Membran eine Metallmembran, wobei diese möglichst aus einem korrosionsbeständigen Material, insbesondere aus Gold oder einer Goldlegierung bestehen kann.Preferably, the membrane is a metal membrane, which may possibly consist of a corrosion-resistant material, in particular of gold or a gold alloy.

Ein gutes Spektrum an Tonschwingungen ist dadurch erzielbar, daß der Schwingungserzeuger eine von einem Anschlaghammer anschlagbare Glocke oder eine Tonfeder ist, die vorzugsweise aus einem Metall besteht.A good range of sound vibrations can be achieved by virtue of the fact that the oscillator is a bell which can be hit by a stop hammer or a gong which preferably consists of a metal.

Besonders gute Klangeigenschaften sind dabei dann erreichbar, wenn der Schwingungserzeuger aus Niobium (Nb) oder einer Niobium (Nb) enthaltenen Legierung besteht.Particularly good sound properties can be achieved if the vibration generator consists of niobium (Nb) or a niobium (Nb) -containing alloy.

Ausführungsbeispiele der Erfindung sind in der Zeichnung dargestellt und werden im folgenden näher beschrieben. Es zeigen

Figur 1
eine Teil-Querschnittsansicht eines ersten Ausführungs- beispiels einer Uhr
Figur 2
eine Teil-Querschnittsansicht eines zweiten Ausführungs- beispiels einer Uhr.
Embodiments of the invention are illustrated in the drawings and will be described in more detail below. Show it
FIG. 1
a partial cross-sectional view of a first embodiment of a clock
FIG. 2
a partial cross-sectional view of a second embodiment of a clock.

Die in den Figuren dargestellten Teilausschnitte einer Uhr zeigen ein Gehäuse 1 der Uhr deren Gehäuseinnenraum 2 eine Schallöffnung 3 besitzt, die durch eine metallische Membran 10 verschlossen ist.The partial sections of a clock shown in the figures show a housing 1 of the clock whose housing interior 2 has a sound opening 3 which is closed by a metallic membrane 10.

Dabei ist an dem Gehäuse 1 im Randbereich der Schallöffnung 3 eine radial umlaufende Ringfläche 4 angeordnet, die sich radial zur Schallöffnung 3 erstreckt und in der eine radial umlaufende Nut 5 ausgebildet ist.In this case, a radially encircling annular surface 4 is arranged on the housing 1 in the edge region of the sound opening 3, which extends radially to the sound opening 3 and in which a radially encircling groove 5 is formed.

In der Nut 5 ist ein Dichtring 6 angeordnet, der teilweise aus der Nut 5 herausragt.In the groove 5, a sealing ring 6 is arranged, which protrudes partially from the groove 5.

Auf der Ringfläche und dem Dichtring 6 ist ein Spannring 7, 7' mit einem etwa rechteckigen Querschnitt fest in Auflage.On the annular surface and the sealing ring 6 is a clamping ring 7, 7 'with an approximately rectangular cross section firmly in circulation.

An der der Ringfläche 4 abgewandten Seite des Spannrings 7, 7' ist die Membran 10 durch Laserschweißen befestigt und deckt die Öffnung des Spannrings 7, 7' ab.At the side facing away from the annular surface 4 of the clamping ring 7, 7 ', the membrane 10 is fixed by laser welding and covers the opening of the clamping ring 7, 7' from.

Innerhalb des Gehäuseinnenraums 2 sind zentrisch zwei Glocken 8, 8' eines Schwingungserzeugers angeordnet, die zur Erzeugung von Tonschwingungen von einem nicht dargestellten Anschlaghammer anschlagbar sind.Within the housing interior 2, two bells 8, 8 'of a vibrator are arranged centrally, which can be engaged by a stop hammer, not shown, for generating sound vibrations.

Die Glocken 8, 8' sind koaxial zueinander angeordnet und weisen zentrisch Halteelemente 9 zur nicht dargestellten Befestigung im Gehäuse 1 auf.The bells 8, 8 'are arranged coaxially with each other and have centrally holding elements 9 for attachment, not shown, in the housing 1.

Die Membran 10 ist nach außen von einem mit dem Gehäuse 1 verbunden topfartigen Gehäuseboden 11 abgedeckt, wobei zwischen Membran 10 und Gehäuseboden 11 ein Raum 12 gebildet ist, von dem aus Schallaustrittsöffnungen 13 radial nach außen führen.The membrane 10 is covered to the outside by a cup-shaped housing bottom 11 connected to the housing 1, wherein a space 12 is formed between the membrane 10 and the housing bottom 11, from which sound outlet openings 13 lead radially outward.

Dabei bilden der Raum 12 und die Schallaustrittsöffnungen 13 einen Helmholtz-Resonator.The space 12 and the sound outlet openings 13 form a Helmholtz resonator.

Bei dem Ausführungsbeispiel der Figur 1 sind in dem Spannring 7 radial gerichtet und radial nach außen mündende Gewindebohrungen 14 ausgebildet, die radial nach innen geschlossen sind.In the embodiment of the FIG. 1 are radially directed in the clamping ring 7 and radially outwardly opening threaded holes 14 are formed, which are closed radially inwardly.

Zu den Gewindebohrungen 14 koaxiale Stufenbohrungen 15 sind in dem Gehäuse 1 ausgebildet, deren kleine Stufen 16 radial nach innen und deren große Stufen 17 radial nach außen münden.To the threaded holes 14 coaxial stepped holes 15 are formed in the housing 1, whose small steps 16 open radially inward and their large steps 17 radially outward.

In die Stufenbohrungen 15 sind radial von außen Zugschrauben 18 eingeführt und mit ihrem Gewindeschaft in die Gewindebohrungen 14 eingeschraubt.In the stepped holes 15, tension screws 18 are introduced radially from the outside and screwed with their threaded shank in the threaded holes 14.

Mit ihren Schraubköpfen 19 stützen sich die Zugschrauben 18 an dem Übergang von der großen Stufe 17 zur kleinen Stufe 16 ab. Durch weiteres Einschrauben der Zugschrauben 18 in die Gewindebohrungen 14 wird der Spannring 7 radial nach außen gedehnt und damit die Membran 10 radial gespannt, so daß ihre Eigenfrequenz geändert wird.With their screw heads 19, the lag screws 18 are based on the transition from the large step 17 to the small step 16. By further screwing the lag screws 18 in the threaded holes 14 of the clamping ring 7 is stretched radially outwards and thus the membrane 10 radially stretched, so that their natural frequency is changed.

Bei dem Ausführungsbeispiel der Figur 2 sind peripher zum Spannring 7' um diesen herum gleichmäßig verteilt axiale Gewindebohrungen 20 im Gehäuse 1 ausgebildet, in die Spannschrauben 21 einschraubbar sind, die mit einem Teil ihres Schraubenkopfes 22 radial über den Spannring 7' ragen und durch festes Einschrauben in die Gewindebohrungen 20 den Spannring 7' fest auf die Ringfläche 4 pressen, so daß der Spannring 7' in dieser Position fest gehalten wird.In the embodiment of the FIG. 2 are circumferentially to the clamping ring 7 'around this evenly distributed axial threaded holes 20 formed in the housing 1, in the clamping screws 21 are screwed, which protrude with a portion of its screw head 22 radially over the clamping ring 7' and by firmly screwing into the threaded holes 20, the clamping ring 7 'press firmly on the annular surface 4, so that the clamping ring 7' is held firmly in this position.

Wird der Spannring 7' durch eine nicht dargestellte Vorrichtung radial auf die gewünschte Spannung der Membran 10 gedehnt und diesem Zustand durch die Spannschrauben 21 auf der Ringfläche 4 fixiert, besitzt die Membran 10 eine Radialspannung mit der gewünschten Eigenfrequenz.If the clamping ring 7 'radially expanded by a device, not shown, to the desired voltage of the membrane 10 and this state fixed by the clamping screws 21 on the annular surface 4, the membrane 10 has a radial stress at the desired natural frequency.

BezugszeichenlisteLIST OF REFERENCE NUMBERS

11
Gehäusecasing
22
GehäuseinnenraumHousing interior
33
Schallöffnungsound hole
44
Ringflächering surface
55
Nutgroove
66
Dichtringseal
77
Spannringclamping ring
7'7 '
Spannringclamping ring
88th
Glockenbell
8'8th'
Glockenbell
99
Halteelementretaining element
9'9 '
Halteelementretaining element
1010
Membranmembrane
1111
Gehäusebodencaseback
1212
Raumroom
1313
SchallaustrittsöffnungenSound outlets
1414
Gewindebohrungenthreaded holes
1515
Stufenbohrungenstepped holes
1616
kleine Stufesmall step
1717
große Stufebig step
1818
Zugschraubenlag screws
1919
Schraubenköpfescrew heads
2020
Gewindebohrungenthreaded holes
2121
Spannschraubenturnbuckles
2222
Schraubenkopfscrew head

Claims (24)

  1. Timepiece, in particular wristwatch, having a casing, of which the casing interior has, on the viewer's side, an opening closed by a cover glass and, on the base side, a sound aperture which is closed by a membrane which has its radially encircling peripheral region in sealed abutment against a corresponding annular surface of the casing, having a vibration generator which is arranged in the casing interior and can generate sound vibrations, characterized in that the radially encircling periphery of the membrane (10) can be subjected to tensile loading in the radially outward direction by a tensioning means.
  2. Timepiece according to Claim 1, characterized in that the radially encircling periphery of the membrane (10) is connected in a sealed manner to a clamping ring (7, 7') which can be subjected to tensile loading in the radially outward direction by the tensioning means.
  3. Timepiece according to Claim 2, characterized in that the radially encircling periphery of the membrane (10) is connected to the clamping ring (7, 7') by a non-releasable connection.
  4. Timepiece according to either of Claims 2 and 3, characterized in that the membrane (10) is connected to the clamping ring (7, 7') with a certain level of radial prestressing.
  5. Timepiece according to one of Claims 2 to 4, characterized in that the membrane (10) is connected to the clamping ring (7, 7') by soldering or welding, in particular by laser welding.
  6. Timepiece according to one of Claims 2 to 4, characterized in that the membrane is connected to the clamping ring by adhesive bonding.
  7. Timepiece according to Claim 2, characterized in that the membrane is clamped in between two clamping-ring parts which can be connected to one another.
  8. Timepiece according to Claim 7, characterized in that the two clamping-ring parts can be clamped axially in relation to one another by screws.
  9. Timepiece according to one of the preceding claims, characterized in that a groove (5), which is formed in a radially encircling manner in the annular surface, contains a sealing ring (6), against which the membrane or the clamping ring (10) butts axially.
  10. Timepiece according to one of the preceding claims, characterized in that the clamping ring (7') can be clamped against the annular surface (4) by means of clamping screws (21), which can be screwed into axial threaded bores (20) of the casing (1) and have their screw head (22) bearing on the clamping ring (7').
  11. Timepiece according to Claim 10, characterized in that the clamping screws (21) are distributed uniformly around the clamping ring (7').
  12. Timepiece according to one of the preceding claims, characterized in that the clamping ring (7) contains radially directed threaded bores (14) which open out in the radially outward direction and into which it is possible to screw tensioning screws (18), which can be supported on the casing (1) against moving radially inwards.
  13. Timepiece according to Claim 12, characterized in that the tensioning screws (18) are arranged in stepped bores (15) which are coaxial with the threaded bores (14) and of which the large step (17) opens out in the radially outward direction, the tensioning screw (18) having its screw head (22) supported on the transition between the large step (17) and the small step (16).
  14. Timepiece according to one of Claims 1 to 11, characterized in that the membrane can be subjected to axial adjustment by a clamping element in its radially outer peripheral region.
  15. Timepiece according to Claim 14, characterized in that the clamping element is a clamping ring which acts on the membrane axially in its radially outer encircling peripheral region.
  16. Timepiece according to either of Claims 14 and 15, characterized in that the clamping element can be adjusted axially by means of adjusting screws.
  17. Timepiece according to one of the preceding claims, characterized in that the membrane (10) is covered by a casing base (11) which can be fastened on the casing (1), a space (12) from which sound-outlet openings (13) lead outwards being formed between the membrane (10) and casing base (11).
  18. Timepiece according to Claim 17, characterized in that the sound-outlet openings (13) lead radially outwards.
  19. Timepiece according to either of Claims 17 and 18, characterized in that the space (12) and the sound-outlet openings (13) form a Helmholtz resonator.
  20. Timepiece according to one of the preceding claims, characterized in that the membrane (10) is a metal membrane.
  21. Timepiece according to Claim 20, characterized in that the membrane consists of gold or of a gold alloy.
  22. Timepiece according to one of the preceding claims, characterized in that the vibration generator is a gong or a bell (8, 8') which can be struck by a hammer.
  23. Timepiece according to Claim 22, characterized in that the vibration generator consists of a metal.
  24. Timepiece according to Claim 23, characterized in that the vibration generator consists of niobium (Nb) or of a niobium (Nb)-containing alloy.
EP06022988A 2005-12-07 2006-11-04 Timepiece Active EP1795978B1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE102005058322A DE102005058322B4 (en) 2005-12-07 2005-12-07 Clock

Publications (3)

Publication Number Publication Date
EP1795978A2 EP1795978A2 (en) 2007-06-13
EP1795978A3 EP1795978A3 (en) 2008-06-18
EP1795978B1 true EP1795978B1 (en) 2011-01-05

Family

ID=37496432

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06022988A Active EP1795978B1 (en) 2005-12-07 2006-11-04 Timepiece

Country Status (4)

Country Link
US (1) US7995776B2 (en)
EP (1) EP1795978B1 (en)
DE (2) DE102005058322B4 (en)
HK (1) HK1100189A1 (en)

Families Citing this family (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH704940B1 (en) * 2008-02-14 2012-11-15 Patek Philippe Sa Geneve ringing timepiece.
EP3404493B1 (en) * 2010-03-16 2021-09-01 Montres Breguet S.A. Chiming watch provided with an acoustic membrane
CH704184A2 (en) 2010-12-02 2012-06-15 Montres Breguet Sa Acoustic radiation membrane for e.g. music watch, has asymmetrical regions i.e. ellipses, to maximize oscillation frequency of membrane in specific frequency band, where regions are excavated in membrane with different uniform thicknesses
CH708095B1 (en) * 2013-05-28 2021-05-14 Montres Breguet Sa Ringing mechanism provided with means for selecting the vibratory mode of a gong.
CH708956B1 (en) 2013-12-09 2021-08-31 Montres Breguet Sa Acoustic radiation membrane for a musical watch.
EP2942675B1 (en) * 2014-05-07 2016-11-16 Société anonyme de la Manufacture d'Horlogerie Audemars Piguet & Cie Chiming watch
CH710166B1 (en) 2014-10-15 2018-12-14 Montres Breguet Sa Arrangement with acoustic radiation membranes for a musical watch or bell.
EP3537229B1 (en) * 2018-03-05 2024-04-24 Montres Breguet S.A. Musical watch case
JP6866884B2 (en) * 2018-10-04 2021-04-28 カシオ計算機株式会社 Cases, watches, how to make cases and how to make watches
EP3835883A1 (en) * 2019-12-11 2021-06-16 The Swatch Group Research and Development Ltd Arrangement for holding and vibration transmission of an acoustic radiation membrane in a watch case
EP4113219B1 (en) 2021-06-29 2025-02-12 Montres Breguet S.A. Method for frequency tuning of an assembly of plates of a watch, and watch comprising the assembly of tuned plates

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US384412A (en) * 1888-06-12 bapst
DE920958C (en) * 1943-09-27 1954-12-02 Ditischeim & Cie Fabriques Vul Alarm clock
US2644294A (en) * 1943-09-27 1953-07-07 Ditisheim Robert Alarm wrist watch
DE902479C (en) * 1949-09-18 1957-03-28 Junghans Geb Ag Sound body for alarm clocks
CH324394A (en) * 1955-01-27 1957-09-15 Simon Edgar Wristwatch with alarm clock
CH323231A (en) * 1955-06-22 1957-07-15 Simon Edgar Alarm clock timepiece
US3879931A (en) * 1972-12-27 1975-04-29 Citizen Watch Co Ltd Electronic watch with an electronically operated sound producer
US4068461A (en) * 1976-04-15 1978-01-17 Frontier Inc. Digital electronic alarm watch
JPS52151065U (en) * 1976-05-12 1977-11-16
US4216650A (en) * 1976-09-07 1980-08-12 Kabushiki Kaisha Daini Seikosha Alarm wristwatch

Also Published As

Publication number Publication date
DE102005058322A1 (en) 2007-06-21
HK1100189A1 (en) 2007-09-07
EP1795978A3 (en) 2008-06-18
US20070140067A1 (en) 2007-06-21
US7995776B2 (en) 2011-08-09
DE102005058322B4 (en) 2007-09-06
DE502006008655D1 (en) 2011-02-17
EP1795978A2 (en) 2007-06-13

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