Classifications

• • G—PHYSICS
  • G04—HOROLOGY
  • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
  • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
  • G04C3/008—Mounting, assembling of components
• • G—PHYSICS
  • G04—HOROLOGY
  • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
  • G04C3/00—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means
  • G04C3/04—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means wherein movement is regulated by a balance
• • G—PHYSICS
  • G04—HOROLOGY
  • G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
  • G04C10/00—Arrangements of electric power supplies in time pieces
• • G—PHYSICS
  • G04—HOROLOGY
  • G04F—TIME-INTERVAL MEASURING
  • G04F8/00—Apparatus for measuring unknown time intervals by electromechanical means
  • G04F8/02—Apparatus for measuring unknown time intervals by electromechanical means using an electromechanical oscillator
  • G04F8/04—Apparatus for measuring unknown time intervals by electromechanical means using an electromechanical oscillator using a piezoelectric oscillator

Definitions

• the present invention relates to a regulator member for a wristwatch, in particular an electronic regulator member for a mechanical wristwatch.
• CH-A-597636 (Ebauches SA) proposes a mechanical movement with a mainspring and a generator.
• the spring actuates, by means of a gear train, a time indicator and the generator that delivers an alternating voltage.
• the generator supplies a rectifier that charges a storage capacity to power a crystal oscillator and an electronic control circuit.
• the electronic control circuit comprises a comparison logic circuit and a control circuit. energy dissipation connected to the output of the comparison logic circuit, the power absorption of which can be controlled by the comparison logic circuit.
• An input of the comparison logic circuit is connected to the reference circuit and another input of the comparison logic circuit is connected to the generator.
• EP-A-0239820 and EP-A-679968 disclose various electronic circuits for controlling the speed of a microgenerator in which a control circuit continuously monitors the angular position of the rotor and brakes it as soon as its angular position is in position. advanced. Because of their sensitivity to component errors and phase variations, these circuits are difficult to adjust.
• EP816955 describes an improvement to the electronic control circuits of watchmaking microgenerators, in which the voltage rectifier comprises transistors controlled by comparators to replace the diodes after the start of the circuit.
• EP0851322 discloses a microgenerator for watch movement comprising a stator with three coils electrically connected and a rotor provided with magnetized regions. The coils are arranged asymmetrically about the axis of the rotor, to facilitate assembly.
• WO0063749 the content of which is incorporated by reference, describes a watch movement with a microgenerator.
• the wheels and gears of the gear train are electrically connected to the ground (that is to say to the plate) and made of a non-magnetic material.
• An object of the present invention is to provide a mechanical chronograph watch movement, quartz controlled, which offers high precision, and which is suitable for measuring durations with a fine resolution.
• a quartz chronograph-controlled mechanical chronograph-watch movement construction that makes it possible to achieve these first goals is illustrated in FIG. 1, which schematically illustrates a sectional view of an example of a gear train for such a watch.
• mechanical chronograph with electronic regulation The wheel has a gear main R H for displaying the current time (hours, minutes, seconds), and a chronograph wheel R c for displaying timed durations.
• the chronograph wheel is driven by the seconds wheel 4 of the main wheel R H only when the chronograph is started; otherwise it is disengaged.
• the reference 1 designates a barrel with the winding of the barrel 10 and a toothing 1 1 which meshes with the pinion of high average 20 on the mobile of large average 2.
• the wheel of large average 21 meshes with its pinion average 30 on the mobile of average 3, whose average wheel 31 meshes with the second gear 40 on the mobile of the second 4.
• a second hand 43 can be mounted on the mobile of the second 4 to display the second of the current time.
• the second wheel 41 of the second mobile 4 meshes with the pinion 50 of the first intermediate mobile 5, the wheel 51 drives the pinion 60 of the second intermediate mobile 6.
• This second intermediate mobile 6 comprises a wheel 61 which drives the reversing gear 7 in engagement with the toothing 80 on the axis of a generator 8.
• the generator 8 produces an electric current when it is driven, which makes it possible to supply an electronic speed adjustment circuit 80 in order to compare the frequency rotating the rotor with a reference frequency given by a crystal oscillator 81 and braking the rotor when it rotates too quickly.
• Known generators of this type are usually dimensioned and regulated to perform between 4 and 8 revolutions per second, for example 5.33 revolutions per second.
• the device of Figure 1 further comprises a chronograph wheel R c with a fifth mobile 9 whose pinion 90 can be engaged with the wheel 42 of the second mobile 4
• the fifth mobile 9 for example performs one revolution in six seconds. It comprises a wheel 91 which drives the pinion 120 of the sixth mobile 12, performing 10 revolutions per second, and whose wheel drives the pinion 130 on the axis of which is mounted a display needle 131 of a hundredth of a second (the display another fraction of second of course also possible). In this embodiment, the needle 131 performs one revolution per second.
• the main wheel R H thus allows to multiply the speed of rotation from the barrel 1 to the mobile of the second 4, then between the second mobile and the generator 8.
• the chronograph wheel R c when it is engaged, makes it possible to multiply the speed of rotation from the mobile of second 4 to the pinion of hundredth of a second 130.
• This new construction achieves the above objectives, and in particular to benefit from the accuracy of quartz to regulate a mechanical chronograph to the hundredth of a second (or another fraction of the second).
• the gear R c between the wheel of the second 4 and the mobile 13 display hundredths of a second has several driven gears 90, 120, 130.
• Each of these gears has a smaller number of teeth than the one of the wheel that drives it, creating a positioning game.
• the pinion 130 has a significantly smaller number of teeth than the wheel 121 which drives it. This results in an accumulation of games that accumulate in the gear train RC, and thus an inaccurate positioning of the display needle hundredths of a second, which gives the impression of floating.
• An additional object of the present invention is therefore to provide a chronograph watch movement that allows to limit games in the wheel.
• Another object of the present invention is to provide a chronograph watch movement that allows positioning of Precisely the display needle a fraction of a second (for example, one hundredth of a second) of the chronograph.
• a chronograph-watch movement comprising a barrel; a main cog in driving one or more indicators of the current time; a regulator member comprising a generator driven by the main wheel, the generator supplying an electronic control circuit for controlling the speed of rotation of the main wheel according to a crystal oscillator; a chronograph cogwheel geared to the main gear train to drive a timed time indicator; and in which the chronograph wheel is engageable on a mobile of the main train which performs more than one revolution per minute.
• the chronograph wheel gear engages on a mobile that performs at least one turn per second, no multiplication is necessary.
• the chronograph wheel is engageable on a pinion or a wheel mounted on the axis of the generator, that is to say on the fastest mobile linked to the main wheel.
• the generator is then driven by the main wheel, and in turn drives the chronograph wheel when it is engaged.
• the chronograph wheel is therefore divisive between the second wheel and the mobile display hundredths of a second. For example, in the case of a generator rotating at a speed of 4 to 8 revolutions per second, no multiplication is necessary to display the hundredth of a second by means of a mobile performing a tenth of a revolution per second or even a turn per second. This results in a much improved accuracy in the positioning of this mobile.
• the main wheel may comprise a second mobile and one or more intermediate mobile, the generator being downstream of the second mobile.
• the chronograph train is arranged to be driven by one of the intermediate mobiles or the generator when the
• the gears of the chronograph workpiece portion R c between the clutch and the fastest mobile Rc gear are all leading; this portion of RC train does not have driven sprockets. This results in a more precise positioning of the chronograph indicators.
• Figure 1 schematically illustrates a sectional view of the main elements of the main wheel and chronograph wheel of a mechanical chronograph watch controlled by a quartz oscillator.
• Figure 2 schematically illustrates a sectional view of the main elements of the main wheel and gear chronograph of a mechanical chronograph watch regulated by a quartz oscillator according to the invention.
• Figure 2 schematically illustrates the main elements of the main train and the chronograph wheel of a mechanical chronograph watch regulated by a quartz oscillator according to the invention. Elements identical or similar to those of Figure 1 already described bear the same reference numbers.
• the movement comprises a main wheel R H which is permanently driven for the display of the time when the watch is running, and a chronograph wheel R c which is engaged by the main wheel only when the chronograph is started ; the rest of the time, the chronograph wheel R c is stopped.
• a barrel 1 with an armature 10 and a toothing cylinder 1 1 stores in mechanical form the energy required for the running of the watch and the chronograph.
• the barrel can be reassembled for example by a winding crown or by an automatic winding system with an oscillating weight.
• the toothing 1 1 meshes with the pinion 20 of the mobile of medium 2, whose wheel 21 drives the pinion 30 of the mobile of average 3.
• This mobile of average 3 also comprises a wheel of average 31 meshing with the pinion seconds 40 ' on the mobile of the second 4 '.
• the second mobile is regulated to perform one revolution in 60 seconds and carries the second hand 43.
• the regulation of the second mobile is through the first intermediate mobile 5, carrying the pinion 50 and the wheel 51, the second intermediate mobile 6 with the pinion 60 and the wheel 61, and the inverter pinion 7 which causes the Generator 8.
• This portion of the train makes it possible to multiply the speed of rotation to the generator.
• the generator 8 comprises for example a rotor with two magnetic plates 82, 83 whose rotation produces a field
• the frequency or the phase of the AC voltage induced in these coils is compared by the electronic control circuit 80 with the frequency or the phase of a reference signal delivered by a crystal oscillator 81. .
• the electronic circuit 80 reduces the load impedance seen by the coils, so as to at least partially short-circuit and brake thus the rotor.
• the chronograph wheel R c includes a clutch 14 which engages directly on a wheel or pinion mounted on the axis of the generator 8, see the rotor of the
• the clutch 14 drives the mobile 1 5 with its wheel 150 and pinion 1 51; in an advantageous embodiment, the mobile 15 performs one revolution per second and makes it possible to indicate the hundredths of a second timed, by means of the hundredth of a second hand 1 52 pointing to a corresponding index.
• the gear 1 51 drives the wheel 160 of the driver 16 seconds counter
• the pinion 161 drives the wheel 170 of the second mobile chronograph 17, which is here coaxial with the mobile 1 5 and performs a turn by minute to display the timed seconds.
• a return 18 and an inverter pinion 19 then to drive the mobile 21 minutes counter, which performs, for example, one turn per hour to indicate the minutes timed.
• the mobile 20 with its pinion 201 and its wheel 200 is placed between the reversing pinion 19 and the mobile 21; it is advantageously provided with flexible fingers positioned by a jumper.
• the mobile RH and RC gear are preferably all electrically connected to the plate of the movement, to avoid the accumulation of electrical charges and a van-den-Graaf effect.
• At least the closest movable rotor 82,83 are advantageously made in a non-magnetic material so as not to disturb the magnetic field.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Measurement Of Unknown Time Intervals (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=49293597

Family Applications (1)

Country Status (6)

Families Citing this family (1)

Family Cites Families (17)

• 2012
  • 2012-09-25 CH CH01734/12A patent/CH707005B1/fr unknown
• 2013
  • 2013-09-18 WO PCT/EP2013/069402 patent/WO2014048819A2/fr active Application Filing
  • 2013-09-18 EP EP13771081.0A patent/EP2901218A2/de not_active Withdrawn
  • 2013-09-18 JP JP2015532397A patent/JP6267204B2/ja not_active Expired - Fee Related
  • 2013-09-18 CN CN201380049673.XA patent/CN104813242B/zh not_active Expired - Fee Related
  • 2013-09-18 US US14/424,468 patent/US9348316B2/en active Active

Non-Patent Citations (1)

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