EP3885843A1 - Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist - Google Patents

Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist Download PDF

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Publication number
EP3885843A1
EP3885843A1 EP20165319.3A EP20165319A EP3885843A1 EP 3885843 A1 EP3885843 A1 EP 3885843A1 EP 20165319 A EP20165319 A EP 20165319A EP 3885843 A1 EP3885843 A1 EP 3885843A1
Authority
EP
European Patent Office
Prior art keywords
hammer
oscillation
watch
pulse
impact
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
Application number
EP20165319.3A
Other languages
English (en)
French (fr)
Inventor
Jérôme Favre
Lionel Paratte
Laurent Nagy
Jean-Jacques Born
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.)
Swatch Group Research and Development SA
Original Assignee
Swatch Group Research and Development 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 Swatch Group Research and Development SA filed Critical Swatch Group Research and Development SA
Priority to EP20165319.3A priority Critical patent/EP3885843A1/de
Priority to US17/169,633 priority patent/US11703808B2/en
Priority to JP2021031395A priority patent/JP7143464B2/ja
Priority to CN202110310886.XA priority patent/CN113448239B/zh
Publication of EP3885843A1 publication Critical patent/EP3885843A1/de
Pending legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/04—Indicating the time of the day
    • G04C21/06—Indicating the time of the day by striking mechanism
    • G—PHYSICS
    • G04—HOROLOGY
    • G04B—MECHANICALLY-DRIVEN CLOCKS OR WATCHES; MECHANICAL PARTS OF CLOCKS OR WATCHES IN GENERAL; TIME PIECES USING THE POSITION OF THE SUN, MOON OR STARS
    • G04B23/00—Arrangements producing acoustic signals at preselected times
    • G04B23/02—Alarm clocks
    • G04B23/026—Hammer driving; hammers; devices with several hammers or sounding bodies; vibrators
    • G—PHYSICS
    • G04—HOROLOGY
    • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
    • G04C21/00—Producing acoustic time signals by electrical means
    • G04C21/02—Constructional details

Definitions

  • the invention relates to a striking mechanism for a watch.
  • Said mechanism is capable of generating one or more sounds to signal an alarm or minute repeaters.
  • said system traditionally comprises one or more gongs each consisting of a metal wire generally of circular shape and placed in a plane parallel to the dial of the watch.
  • the metal wire of each gong is generally arranged around the watch movement, in the watch cage and above a plate on which the different parts of the movement are mounted.
  • One end or more ends of each stamp are fixed, for example by soldering, to a stamp holder integral with the plate, for example, which may be unique for all the stamps.
  • the other end of each stamp may be generally free.
  • the striking mechanism comprises at least one hammer actuated at the request of the user, to indicate the time by a series of impact noises of the hammer on the gong.
  • Each hammer is fitted with a return spring allowing it to fall back onto the gongs.
  • the energy reserve for a series of strikes comes from a barrel spring, which is recharged regularly by the user.
  • This type of mechanism is quite complex and bulky and the energy of the impacts is limited and often decreasing with the mechanical unloading of the spring, the interval between the impacts is also dependent on the unloading of the spring.
  • the autonomy of the barrel spring is ultimately limited, and it often has to be reset after the alarm or audible indication has ended.
  • Electronic watches of the quartz or other type are also known, provided with a ringing and / or minute repeater system, in which a piezoelectric actuator acts as a loudspeaker.
  • the ringing takes place using an integrated circuit linked to the actuator.
  • the speaker produces a series of sounds for an alarm, or to indicate the time at the request of the user.
  • this system is less complex and that the autonomy of this type of ringing, as well as the volumes are greater than in the case of a mechanical watch.
  • the sound produced by this mechanism is synthetic and unattractive compared to the natural sound of a mechanical timbre.
  • the aim of the invention is therefore to overcome the drawbacks of the state of the art by providing a striking mechanism for a watch, which uses a new principle for the generation of one or more sounds of at least one gong.
  • the invention relates to a watch provided with a striking mechanism as well as to a method for producing sounds by the mechanism, comprising the characteristics defined in the claims.
  • a watch according to the invention comprises a striking mechanism, comprising at least one fixed gong and at least one hammer, as well as an electric energy accumulator, such as a battery.
  • the mechanism further comprises an integrated circuit supplied by the electric energy accumulator and configured to produce current pulses, and an electrodynamic actuator, which is linked to the integrated circuit and which is capable of receive said pulses, the actuator being integral with the hammer or connected to the hammer so as to generate in response to said pulses a movement of the hammer from a rest position thereof, said movement being able to produce an impact of the hammer on the stamp.
  • the mechanism also comprises a return means, such as a spring linked to the hammer so as to return the hammer to its rest position after impact.
  • a watch according to the invention can comprise a basic mechanical or electronic horological movement.
  • the watch becomes a hybrid watch which overcomes the drawbacks described above.
  • the watch comprises a majority of mechanical components supplemented by an electromechanical striking mechanism, which is more compact and able to increase the autonomy, as well as the energy and the uniformity of the impacts with respect to the state. of technique.
  • the watch comprises a majority of electronic and / or electromechanical components, as well as a tone which generates a natural sound instead of the synthetic sounds produced by electronic watches of the state of the art.
  • the hammer undergoes one or more pre-oscillations before reaching the impact.
  • the hammer and the gong are respectively provided with magnets in attraction.
  • the minute repeater system comprises a gong 4 fixed to the plate (not shown) of the watch by a gong holder 5.
  • the gong 4 can be produced according to an embodiment known from the state of the art.
  • the minute repeater mechanism further comprises an electric energy accumulator 6, such as a battery, and an integrated circuit 7 supplied by the electric energy accumulator 6, as well as detectors 8 and 9 of the position of the axes. needles 1 and 2. These detectors are also known per se. They can be configured to detect for example, but not limited to the position of a series of teeth provided on the respective axes.
  • a hammer 15 is rotatably mounted about an axis of rotation 16, so that the hammer can impact the gong 4.
  • the rotation of hammer 15 can be actuated by an electrodynamic actuator 17, which is connected to integrated circuit 7.
  • Hammer 15 is provided with a spring (not shown) which returns the hammer to its rest position after impact.
  • the actuator 17 receives current pulses generated by the integrated circuit 7, on the basis of the position detected by the detectors 8 and 9, so as to announce the time at the request of the user, by a series of specific sounds.
  • a second gong 4 'and a second hammer provided with its electromechanical actuator (not shown) are present to generate distinct sounds.
  • the dimensions of the actuator 17 and of the hammer 15 are shown only as an indication, but it is clear that all of these components will occupy only a fraction of the space occupied by a purely mechanical striking mechanism, which generally occupies the entire surface of the dial.
  • the figure 2 shows an electronic watch of the quartz type according to the invention, also comprising two mechanical gongs 4 and 4 'and corresponding hammers 15 and electrodynamic actuators 17 (a single hammer and a single actuator is shown), of the same type and dimensions as in the case of the figure 1 .
  • the hands 1 and 2 are set in rotation by a motor 20 supplied by an electric energy accumulator 6, such as a battery, using an integrated circuit 7 linked to a quartz 21, said components forming part of the electronic movement of the watch, as is known from the state of the art.
  • the electrodynamic actuator 17 receives pulses from the integrated circuit 7 of the electronic movement.
  • the presence of detectors 8 and 9 of the position of the axes of needles 1 and 2 is optional in this embodiment. Instead of having the detectors 8 and 9, it is also possible to configure the integrated circuit 7 so that it can determine the time to be announced by the hammers.
  • a watch according to the invention combines one or more mechanical gongs with a hammer actuated by an electrodynamic actuator. Compared to purely mechanical watches, this This solution makes it possible to have a much greater autonomy, a higher sound intensity, an improved repeatability of the pulses, a constant interval between the pulses, as well as a spatial occupation of the ringing system which is much less than mechanical ringing systems.
  • the invention makes it possible to implement a natural sound for alarms and / or minute repeaters.
  • the sound volume of impact noises depends on the performance of the electrodynamic actuator used. Tests using an existing electrodynamic vibrator have been made. As can be seen below, the observation is that the energy of a single impact is comparable, but still lower than the energy of the impact of a mechanical actuator.
  • particular embodiments of the invention are linked to the way in which the current pulses sent to the actuator 17 are configured with respect to the rest position of the hammer 15, and with respect to a number of parameters of the striking mechanism.
  • a schematic diagram of the mechanism is shown in the figure 3 .
  • the hammer 15 is integral with a magnet 25 linked to the plate 26 of the watch by a return means 27, which may be a spring.
  • a coil 28 surrounds the magnet 25 and receives the current pulses l (t) generated by a voltage signal U (t), which actuate axial movements of the hammer 15, in the x direction.
  • the assembly of the magnet 25, the coil 28 and the spring 27 constitutes the electrodynamic actuator 17.
  • the distance between the gong 4 and the hammer 15 in the rest position is the distance xo indicated in the drawing. In this position, the spring 27 is not prestressed. According to the direction of the current I, the movement of the hammer 15 takes place in the direction + x or -x.
  • the spring 27 returns the hammer to the rest position after a number of oscillations determined by the characteristics of the mass-spring system.
  • the system shown in figure 3 is equivalent to the system shown in figures 1 and 2 , since in the latter, the spring could be a torsion spring or a leaf spring and the actuator is configured to actuate a rotation of the hammer about the axis 16.
  • the return means 27 can also be a mechanical cam, or else an electromagnetic force, or another means.
  • the magnitude of the electromechanical force F em applied by the pulse is such that the force actuates an oscillation of 2x 0 amplitude.
  • This oscillation is illustrated by curve 30 up to the moment of impact ti. If the timbre was not present, the oscillation would follow the dotted curve.
  • the test prototype tested used for the actuator - hammer - spring assembly a vibrator 50 striking a mechanical stamp mounted on a brass base 51.
  • the x direction is indicated in the drawing.
  • the dimensions are indicated in mm, for example the diameter of the stamp can be 35.6 mm, the base 51 can be 44 mm by 44 mm, and the vibrator can be 24.15 mm long and 9.56 mm wide.
  • the kinetic energy of the impact achieved by the prototype according to the embodiment of the figure 4a was calculated as 15.3 ⁇ J. This is of the same order of magnitude as the impact achieved by a mechanical ringing system, estimated at 50 ⁇ J, but clearly lower than the last.
  • more powerful current pulses can be applied and / or the actuator can be optimized by modifying its parameters such as mass, spring constant and coupling factor. But as can be seen below, just adding pre-oscillation pulses greatly increases this energy, even with a non-optimized actuator.
  • the impact energy generated by an electromechanical force equal to or less than the force F em applied for the previous case which uses a single impulse is increased by actuating the hammer in a manner different, illustrated for example on figure 4b .
  • a first inverse pulse 35 of the same magnitude F em as the single pulse of the previous form is first applied.
  • the reverse pulse 35 therefore activates a negative pre-oscillation 30, having an amplitude of 2x 0 in the -x direction.
  • the figure 4c represents the impulses and displacements during a double pre-oscillation.
  • the right column expresses the multiplicative factor to be applied to the electrical consumption of the mode in question, to arrive at the same kinetic energy as with 3 pulses ( Figure 4c ).
  • the forms of executions which include at least one pre-oscillation as follows: the hammer is actuated so that it undergoes at least two oscillations before arriving at impact, at least one of which is designated 'pre-oscillation', the pre-oscillations being followed by a final oscillation which leads to impact.
  • 'pre-oscillation' designates the movement between two consecutive extreme positions of a vibration undergone by the hammer.
  • the oscillations are generated by a series of pulses of opposite signs, so that starting from the second pulse, each pulse is applied approximately when the hammer reaches an extreme point of the oscillation generated by the previous pulse .
  • the magnitudes of the impulses which generate the pre-oscillations are equal to or less than the magnitude of the pulse that generates the final oscillation.
  • the number of pre-oscillations may be greater than two, provided that the magnitude of the pulses is adapted so as to avoid impacts during the pre-oscillations.
  • the applied alternating signal of square shape or other, must have a frequency close to the natural frequency of oscillation of the mass-spring system, so as to effectively amplify the oscillations. This resonance phenomenon is well known to those skilled in the art.
  • the hammer 15 and the gong 4 are provided with attracting magnets, one magnet being fixedly mounted on the gong 4 and the other magnet being fixedly mounted on the hammer 15, so that the magnets come into physical contact when the hammer hits the stamp.
  • the force of attraction is such that the hammer and the gong remain in contact while the gong vibrates, until a reverse pulse applied to the electrodynamic actuator causes the hammer to recoil, breaking the contact between the magnets.
  • This prolonged contact between the hammer and the gong is able to improve the transfer of kinetic energy from the hammer to the gong.
  • This embodiment can be combined with the methods described above according to which the ringing is operated without or with pre-oscillations. In the case of several pre-oscillations, it is necessary to adjust their amplitudes to prevent the magnets from sticking the hammer to the gong before the desired moment of impact.
EP20165319.3A 2020-03-24 2020-03-24 Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist Pending EP3885843A1 (de)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP20165319.3A EP3885843A1 (de) 2020-03-24 2020-03-24 Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist
US17/169,633 US11703808B2 (en) 2020-03-24 2021-02-08 Watch with mechanical or electronic movement provided with a striking mechanism
JP2021031395A JP7143464B2 (ja) 2020-03-24 2021-03-01 打ち方機構を備える機械式または電子ムーブメントを有する腕時計
CN202110310886.XA CN113448239B (zh) 2020-03-24 2021-03-24 设有报时机构的带有机械或电子机芯的手表

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP20165319.3A EP3885843A1 (de) 2020-03-24 2020-03-24 Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist

Publications (1)

Publication Number Publication Date
EP3885843A1 true EP3885843A1 (de) 2021-09-29

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Application Number Title Priority Date Filing Date
EP20165319.3A Pending EP3885843A1 (de) 2020-03-24 2020-03-24 Uhr mit mechanischem oder elektronischem uhrwerk, die mit einem schlagwerk ausgestattet ist

Country Status (4)

Country Link
US (1) US11703808B2 (de)
EP (1) EP3885843A1 (de)
JP (1) JP7143464B2 (de)
CN (1) CN113448239B (de)

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1335311A (fr) * 1962-09-20 1963-08-16 Mécanisme d'entraînement et de sonneries pour horlogerie électrique et autres applications
FR2061680A1 (de) * 1969-09-12 1971-06-25 Junghans Gmbh Geb
CH705303A1 (fr) * 2011-07-22 2013-01-31 Hublot Sa Geneve Pièce d'horlogerie à mécanisme sonore.

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US3440814A (en) * 1967-12-18 1969-04-29 Gen Time Corp Electric clock alarm system
CH640688GA3 (fr) * 1980-10-27 1984-01-31 Eterna Sa Montre a mouvement electronique et a deux moyens d'affichage.
DE3247021A1 (de) * 1982-12-18 1984-06-20 Wehrle Uhrenfabrik GmbH, 7741 Schönwald Uhr mit weck- und schlagwerk
CN2442295Y (zh) * 2000-04-07 2001-08-08 王建兰 一种钟用报时机构
JP3761424B2 (ja) * 2001-05-30 2006-03-29 リズム時計工業株式会社 打鈴装置
EP2290480B1 (de) * 2009-08-26 2012-04-25 Montres Breguet SA Glocke für ein Schlagwerk einer Uhr
CH702424A1 (fr) * 2009-12-24 2011-06-30 Montres Breguet Sa Mécanisme de sonnerie d'une montre.
EP2362279B1 (de) * 2010-02-26 2019-05-08 Montres Breguet SA Schlagwerkmechanismus einer Armbanduhr mit aktiver Dämpfungsgegenfeder
EP2428857B1 (de) * 2010-09-13 2016-02-17 Montres Breguet SA Uhr mit Schlagwerk, die mit einem Klangisolator ausgestattet ist
CH704198A2 (fr) * 2010-12-10 2012-06-15 Montres Breguet Sa Mecanisme de sonnerie d'une montre.
JP6087906B2 (ja) * 2011-05-12 2017-03-01 ウブロ ソシエテ アノニム， ジュネーブＨｕｂｌｏｔ Ｓ．Ａ．， Ｇｅｎｅｖｅ 鐘音機構付き時計
CH705679B1 (fr) * 2011-10-28 2017-01-31 Swatch Group Res & Dev Ltd Circuit d'autorégulation de la fréquence d'oscillation d'un système mécanique oscillant, et dispositif le comprenant.
JP6087895B2 (ja) * 2013-12-23 2017-03-01 ザ・スウォッチ・グループ・リサーチ・アンド・ディベロップメント・リミテッド 磁気脱進機機構を含む時計ムーブメント内のホイールセットのための角速度調節デバイス
JP6961463B2 (ja) * 2017-11-01 2021-11-05 セイコーインスツル株式会社 鳴鐘機構、携帯機器、ムーブメントおよび時計
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Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR1335311A (fr) * 1962-09-20 1963-08-16 Mécanisme d'entraînement et de sonneries pour horlogerie électrique et autres applications
FR2061680A1 (de) * 1969-09-12 1971-06-25 Junghans Gmbh Geb
CH705303A1 (fr) * 2011-07-22 2013-01-31 Hublot Sa Geneve Pièce d'horlogerie à mécanisme sonore.

Also Published As

Publication number Publication date
US11703808B2 (en) 2023-07-18
JP7143464B2 (ja) 2022-09-28
CN113448239A (zh) 2021-09-28
JP2021152532A (ja) 2021-09-30
US20210311437A1 (en) 2021-10-07
CN113448239B (zh) 2023-02-10

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