EP1426837A1 - Pièce d'horlogerie avec indication de la réserve de marche - Google Patents
Pièce d'horlogerie avec indication de la réserve de marche Download PDFInfo
- Publication number
- EP1426837A1 EP1426837A1 EP02080135A EP02080135A EP1426837A1 EP 1426837 A1 EP1426837 A1 EP 1426837A1 EP 02080135 A EP02080135 A EP 02080135A EP 02080135 A EP02080135 A EP 02080135A EP 1426837 A1 EP1426837 A1 EP 1426837A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- generator
- timepiece
- power reserve
- barrel
- stator
- 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.)
- Granted
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Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C10/00—Arrangements of electric power supplies in time pieces
- G04C10/04—Arrangements of electric power supplies in time pieces with means for indicating the condition of the power supply
Definitions
- the present invention relates to a timepiece with generator with indication of the power reserve.
- Such a timepiece comprises a barrel, in which is housed a spring. Time display devices are mechanically coupled to the barrel, as well as an electric power generator.
- a regulator circuit is intended for slave the generator frequency to a reference frequency. To this end, the regulator circuit includes switching means arranged to brake electrically the generator during periods of braking, when the circuit regulator finds that the generator frequency is higher than that of reference.
- the timepiece includes a mechanical energy source formed by a barrel 1 in which is housed a spring 1a, with manual or automatic winding, the winding device not being shown here.
- the barrel 1 is mechanically coupled to the magnetic rotor 2a of a generator electric 2 by means of cogs 3.
- the generator 2 comprises at least one coil 2b from which an alternating voltage Ug is generated, when the rotor magnetized 2a is rotated, generating a magnetic field symbolized at means of an arrow and with which said at least one coil 2b is coupled.
- the terminals of coil 2b are connected to a rectifier 4 supplying a rectified voltage Ua as an output, intended to supply the circuit regulator 6, which will be discussed below.
- Analog organs for displaying a time indication 5 are mechanically coupled to the barrel through the cogs 3 of the movement and are integral in rotation with the rotor 2a.
- the rotation speed of the hands 5 is maintained at a constant average value thanks to the regulator circuit 6, which is intended to control the frequency of the generator to a reference frequency, so that the speed of the needles corresponds to the speed required to obtain a correct time indication.
- This regulator circuit 6 comprises an oscillator 6a stabilized by a quartz of watchmaker type and a frequency divider 6b bringing the frequency of this oscillator 6a at a frequency usable by a logic circuit 6c which controls, by means of a control signal 8, a switching member 7, for example a transistor, for brake generator 2 in order to regulate its frequency at a frequency reference corresponding advantageously to a correct indication of the time by the time indication display units 5.
- the timepiece according to this document also includes a device power reserve indicator 9.
- This device includes a counter 9a counting the successive brake signals 8 for a period of time determined by means of an additional frequency divider 9b.
- a memory 9c is connected at the output of counter 9b so as to store the recorded data during the determined period of time, to the output of which is connected a 9d decoder transforming the stored data into a control signal incremental display means 9e of the power reserve 17, produced at means either of a colored strip or of a liquid crystal cell.
- a display 9e comprising successive lines which light up or appear up to the point corresponding to the value of the quantity measured or calculated.
- One of the main advantages of a timepiece with a generator is: ability to reconcile the use of a traditional mechanical watch movement with the precision of quartz.
- the idea according to the invention is to provide an analog indication of the power reserve while using the indications related to generator operation without increasing the power consumption of the timepiece.
- the invention relates to a timepiece as defined in preamble to the description, characterized in that the generator controls means for actuating an analog power reserve member, by through an electrical quantity transmitted by electrical coupling between the actuating means and the generator, during braking periods.
- the actuation means include a stator and a rotor, and are electrically coupled to the generator by the stator, the latter also being magnetically coupled to the rotor which mechanically moves the analog display member of the reserve of walking between a first position corresponding to the armed spring to a second position corresponding to the disarmed spring.
- Figure 2 represents a simplified diagram of a timepiece according to a preferred embodiment of the invention.
- Figure 2 represents a simplified diagram of a timepiece according to a preferred embodiment of the invention.
- the generator 2 is braked during braking periods, when the regulator circuit 6 finds that the generator frequency is greater than a reference frequency determined.
- the Ug voltage across the coil 2b of the generator, shown in Figure 3A, is an alternating voltage, where the braking periods of this coil are represented by the areas marked f1, f2 and f3.
- a power reserve indicator device is therefore provided. He understands actuating means 10 actuating an analog display member of the power reserve 11. These actuating means 10 are advantageously formed an electrically actuated actuator having a stator comprising in particular a coil 10b and a magnetic rotor 10a.
- the control of these actuation means 10 is transmitted by coupling electric between the coils 2b and 10b, via the switching means 7a to 7d, in the form of an electrical quantity G2 depending on the quantity electric G1 dissipated during braking periods.
- This electric quantity G2 which advantageously corresponds to the electric current I passing through the coil additional 10b, allows not only to power the actuating means 10, but also to induce an average magnetic field, causing the rotor to rotate magnetic 10a.
- H-shaped rectifier bridge as switching means comprising 4 switches 7a to 7d.
- the 4 switches 7a to 7d are controlled by a signal command 8 issued by the regulator circuit 6, as explained below.
- the resulting electrical quantity G2 is shown in Figure 3C. It will be noted for this purpose that according to this first variant, the quantity G2 is advantageously transmitted during periods of braking of the generator, that is to say all the time that these periods last.
- the positive and negative alternations of the electrical quantity G1. then positive half-waves one of the switches is switched to the closed position, the other then being switched to the open position. During negative alternations, the reverse switches are then carried out.
- the quantity G2 transmitted only provides information about the power reserve during positive or negative alternations depending on the connection adopted, during the periods braking.
- the quantity G2 is transmitted during braking periods, i.e. not necessarily all the time that these periods last, but for example only during certain periods such as positive alternation.
- the magnetic rotor 10a is arranged to drive the display member 11 of a first position corresponding to the armed spring to a second position corresponding to the disarmed spring.
- This reserve indicator device walk is given below in the context of Figures 4 to 6.
- Figure 4A shows a top view of a control actuator electric according to a preferred embodiment of the invention.
- the actuation means include in particular an actuator 10 comprising a coil 10b secured to a stator 12 having a cavity 13, preferably circular, thus delimiting first and second stator parts 12a and 12b, connected by narrowed areas of material 12c and 12d, said stator parts 12a and 12b defining two magnetic poles opposite (N and S) during the supply of the coil, that is to say during periods of generator braking.
- the stator is formed advantageously by a material with high magnetic permeability.
- the circular cavity 13 has on its periphery two isthmus 14a and 14b substantially diametrically opposed.
- the actuator 10 also comprises a magnetic rotor 10a, preferably circular, centered in the cavity 13 defined by the stator 12 and mounted in rotation on a shaft 15.
- the magnetic poles (N and S) of the magnetic rotor 10a have been shown according to the so-called rest position of the rotor.
- the rest position means the position taken by the rotor 10a when the stator coil 10b is not supplied, i.e. when the field magnetic induced mean in the coil is zero.
- This rest position is defined in in particular, by the geometry of the stator 12 and the position of the isthmus 14a and 14b.
- the rotary movement of the magnetic rotor 10a relative to the stator 12 is given in detail in Figures 6A to 6C.
- Figure 4B shows the drive mechanism preferentially used with actuator 10 in Figure 4A.
- the rotor not visible in this Figure 4B, is mounted on the shaft 15, the latter defining with the drive gear 16, a mobile for driving the power reserve indicator member.
- the useful angle of indication of the reserve of walking being of the order of 60 °
- it is advantageously provided with a mobile of reduction gear formed by a reduction gear 17 in engagement with the drive wheel 16 and mounted on a shaft 18 driving the analog member indication of the power reserve shown in Figure 5.
- a wheel is preferably used.
- reduction 17 having a hollow sector 20, defining first and second bearing surfaces 21 a and 21 b intended to cooperate with a single stop 19.
- the hollow sector 20 has an angle at the center of 120 °. The two extreme positions for which the bearing surfaces 21a and 21b are in contact with the stop 19, correspond to the two extreme positions of the member power reserve indicator, i.e. at a corresponding first position to the armed spring and to a second position corresponding to the disarmed spring.
- stop devices can be provided, in particular in the form of nipples placed on either side of the viewing angle located on the dial of the timepiece.
- Figure 5 shows a sectional view of the entire indicating device of the power reserve according to the embodiment presented in Figures 4A and 4B.
- the plate 22 serves as a support in particular for the stator 12 and the coil 10b as well as for shafts 15 and 18 on which the gear wheels are respectively mounted 16 and reduction gear 17.
- An upper bridge 23 allows to fix the stop 19.
- a recess made in the upper deck and in dial 24 of the timepiece allows passage to the shaft 18 on which is mounted a member analog 11 for power reserve indication, typically a hand moving next to adequate graduations.
- a disc providing an indication through a window can also be provided, or any other suitable analog display means.
- Figures 6A, 6B and 6C show the displacement of the magnetized rotor by relation to the stator as a function of the reinforcement of the spring housed in the cylinder of the part watchmaking. This displacement corresponds to the evolution of the equilibrium position magnetic defined by the opposition between the existing average magnetic coupling between the stator (12) and the rotor due to the electrical quantity transmitted during braking periods and the positioning coupling existing between the stator and the rotor due to the geometry of the stator, the latter being of high magnetic permeability.
- FIG. 6A corresponds to the initial position of the magnetic rotor 10a when the spring is fully armed.
- the generator is then frequently braked by switching means in order to decrease its operating frequency at the reference frequency.
- the coil 10b is coupled electrically to the generator coil 2b, which generates a field magnetic through stator 12.
- the resulting average induced magnetic field assimilates the stator to a magnetic dipole, a first part stator 12a corresponds for example to the north magnetic pole N, and a second stator part 12b at the south magnetic pole S.
- the pole N of the stator part 12a attracts the pole S of the rotor magnetic 10a.
- the torque of positioning whose effect is to attract the magnetic rotor 10a to its rest position shown in Figure 6C.
- the rotor position is given by the equilibrium position magnetic.
- Figure 6B shows an intermediate position for which the spring is no longer fully armed.
- the brakes applied to the generator are then less frequent and the mean magnetic dipole of the stator is less important. So the magnetic equilibrium position of the magnetic rotor 10a is between the initial position defined in Figure 6A and the rest position defined in Figure 6C.
- the rotor turns in the direction indicated by the arrow.
- Figure 6C shows, as mentioned above, the position of rest of the magnetic rotor 10a, that is to say the position for which the generator is not more braked, when the spring is disarmed or when the generator is no longer in able to operate at the reference frequency.
- the magnetic torque between the stator and the rotor is zero and therefore the magnetic equilibrium position of the rotor now only depends on the torque of positioning, the rotor then being in its so-called rest position depending on the stator geometry.
- the stator has narrowed zones of material 12c and 12d and isthmus 14a and 14b formed on the periphery of the circular cavity 13.
- the rest position then forms an angle (a) of about 80 ° between the axis E of the stator and the axis north-south (N-S) of the magnetic rotor.
- the analog power reserve indication unit gives information on the aging of the oil used for the movement of the timepiece, in particular at the level of the cogs, this body no longer indicating a maximum reserve when the spring is fully armed.
- this organ also as indicator of the aging of the oil of the part watchmaking for its replacement.
- a viscous oil is advantageously used at the level of the indicating device in order to increase its stability.
- the generator preferably corresponds to that as defined in Figure 1 of document EP 1 109 083 filed in the name of the present Applicant, incorporated herein by reference.
- a generator includes a rotor having two flanges arranged on either side of three flat coils, connected in series, forming the stator and offset substantially by 120 ° one by relative to the other relative to the axis of the rotor in the same plane orthogonal thereto.
- Six magnets are fixed radially and at regular intervals on each flange, facing each other coils. The polarity of two consecutive or opposite magnets is opposite.
- the actuation means comprise in in particular a connected coil, by means of switching means example of Figure 2, with the generator coil (s) during periods of braking, in which a ferromagnetic body is arranged, such as for example a iron-nickel alloy or a combination of alloys of the steel-brass type.
- a ferromagnetic body is arranged, such as for example a iron-nickel alloy or a combination of alloys of the steel-brass type.
- the coil is supplied via an electrical variable transmitted by the generator, dependent on the power reserve.
- Field magnetic induced depending on this electrical quantity and therefore on the reserve of walking, has the effect of deforming the ferromagnetic body by magnetostriction. This deformation of the ferromagnetic body is used to indicate the power reserve by any appropriate mechanical means.
- the actuation means comprise in in particular a wire formed by a shape memory alloy connected in series with the or the generator coils during its braking periods.
- a shape memory alloy can acquire two different shapes, a tall form temperature and a low temperature form, these two forms being imposed by the electrical quantity transmitted during braking periods which has the effect to increase the temperature of said wire formed by an alloy of this type.
- Alloys most commonly used are CuZnAl, TiNi and CuAlNi. Note that advantageously, the addition of beryllium in the CuAl alloys makes it possible to obtain significantly lower processing temperatures, while ensuring good stability at high temperature.
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Electric Clocks (AREA)
Abstract
Description
Claims (9)
- Pièce d'horlogerie comprenant un barillet (1), un ressort (1a) logé dans le barillet, des organes d'affichage de l'heure (5) couplés mécaniquement audit barillet, une génératrice d'énergie électrique (2) couplée également audit barillet, et un circuit régulateur (6) destiné à asservir la fréquence de ladite génératrice à une fréquence de référence, ledit circuit régulateur comportant à cet effet des moyens de commutation (7) agencés pour freiner électriquement ladite génératrice pendant des périodes de freinage, lorsque ledit circuit régulateur constate que la fréquence de ladite génératrice est supérieure à celle de référence, ladite pièce d'horlogerie étant caractérisée en ce que la génératrice commande des moyens d'actionnement (10) d'un organe analogique de la réserve de marche(11), par l'intermédiaire d'une grandeur électrique (G2) transmise par couplage électrique entre les moyens d'actionnement et la génératrice, pendant lesdites périodes de freinage.
- Pièce d'horlogerie selon la revendication 1, caractérisée en ce que lesdits moyens d'actionnement (10) dudit organe d'affichage de la réserve de marche sont agencés de manière à déplacer cet organe d'affichage (11) d'une première position correspondant au ressort armé à une deuxième position correspondant au ressort désarmé.
- Pièce d'horlogerie selon la revendication 1 ou 2, dans laquelle la génératrice comprend au moins une bobine (2b), et caractérisée en ce que lesdits moyens d'actionnement comprennent une bobine (10b) additionnelle, ledit couplage électrique entre les moyens d'actionnement et la génératrice étant réalisé par lesdits moyens de commutation (7a, 7b, 7c, 7d) agencés pour coupler électriquement lesdites bobines lors desdites périodes de freinage.
- Pièce d'horlogerie selon la revendication 3, caractérisée en ce que ladite grandeur électrique (G1) est alternative, et en ce que lesdits moyens de commutation (7a, 7b, 7c, 7d) sont commutés de manière à transmettre à ladite bobine additionnelle (10b) une grandeur électrique redressée (G2).
- Pièce d'horlogerie selon la revendication 3 ou 4, caractérisée en ce que les moyens d'actionnement (10) comprennent un actionneur à commande électrique formé par un stator (12) comportant ladite bobine additionnelle (10b) et par un rotor aimanté (10a), ce dernier étant d'une part couplé de manière magnétique au stator et d'autre part couplé mécaniquement au dit organe analogique d'affichage de la réserve de marche (11).
- Pièce d'horlogerie selon la revendication 5, caractérisée en ce que le stator (12) présente une cavité circulaire (13) sur laquelle sont ménagées deux isthmes (14a et 14b) agencés de manière à ce que l'angle utile du rotor (10a) correspondant à son déplacement rotatif soit de 60° environ.
- Pièce d'horlogerie selon la revendication 5 ou 6, caractérisée en ce que ledit rotor (10a) est couplé au dit organe d'affichage analogique de la réserve de marche (11) par l'intermédiaire d'un mobile de démultiplication comprenant une roue de démultiplication (17) présentant un secteur évidé (20) et en ce qu'une butée (19) est agencée dans ledit secteur de manière à limiter l'angle de rotation de ladite roue.
- Pièce d'horlogerie selon l'une des revendications 1 à 7, caractérisée en ce qu'une huile visqueuse est utilisée pour obtenir une indication stable de la réserve de marche par l'organe d'affichage.
- Pièce d'horlogerie selon l'une quelconque des revendications précédentes, caractérisée en ce l'organe d'affichage analogique de la réserve de marche fournit également une indication sur le vieillissement des huiles de ladite pièce d'horlogerie, la première position étant légèrement décalée.
Priority Applications (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02080135A EP1426837B1 (fr) | 2002-12-04 | 2002-12-04 | Pièce d'horlogerie avec indication de la réserve de marche |
DE60236810T DE60236810D1 (de) | 2002-12-04 | 2002-12-04 | Uhrwerk mit Gangreserveanzeige |
AT02080135T ATE472122T1 (de) | 2002-12-04 | 2002-12-04 | Uhrwerk mit gangreserveanzeige |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP02080135A EP1426837B1 (fr) | 2002-12-04 | 2002-12-04 | Pièce d'horlogerie avec indication de la réserve de marche |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1426837A1 true EP1426837A1 (fr) | 2004-06-09 |
EP1426837B1 EP1426837B1 (fr) | 2010-06-23 |
Family
ID=32309449
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02080135A Expired - Lifetime EP1426837B1 (fr) | 2002-12-04 | 2002-12-04 | Pièce d'horlogerie avec indication de la réserve de marche |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP1426837B1 (fr) |
AT (1) | ATE472122T1 (fr) |
DE (1) | DE60236810D1 (fr) |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0762243A1 (fr) * | 1995-08-10 | 1997-03-12 | Asulab S.A. | Pièce d'horlogerie avec indication de la réserve de marche |
-
2002
- 2002-12-04 DE DE60236810T patent/DE60236810D1/de not_active Expired - Lifetime
- 2002-12-04 AT AT02080135T patent/ATE472122T1/de not_active IP Right Cessation
- 2002-12-04 EP EP02080135A patent/EP1426837B1/fr not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0762243A1 (fr) * | 1995-08-10 | 1997-03-12 | Asulab S.A. | Pièce d'horlogerie avec indication de la réserve de marche |
Also Published As
Publication number | Publication date |
---|---|
ATE472122T1 (de) | 2010-07-15 |
DE60236810D1 (de) | 2010-08-05 |
EP1426837B1 (fr) | 2010-06-23 |
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