EP1213626A1 - Dispositif de transmission antichoc pour l'entraínement d'une génératrice par une masse oscillante, notamment dans une montre - Google Patents
Dispositif de transmission antichoc pour l'entraínement d'une génératrice par une masse oscillante, notamment dans une montre Download PDFInfo
- Publication number
- EP1213626A1 EP1213626A1 EP00204370A EP00204370A EP1213626A1 EP 1213626 A1 EP1213626 A1 EP 1213626A1 EP 00204370 A EP00204370 A EP 00204370A EP 00204370 A EP00204370 A EP 00204370A EP 1213626 A1 EP1213626 A1 EP 1213626A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- central shaft
- generator
- oscillating mass
- notch
- 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
Links
- 230000005540 biological transmission Effects 0.000 title claims description 33
- 230000000703 anti-shock Effects 0.000 abstract description 7
- 230000001133 acceleration Effects 0.000 description 3
- 230000035939 shock Effects 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 238000004873 anchoring Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013016 damping Methods 0.000 description 1
- 230000002427 irreversible effect Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
- 210000000707 wrist Anatomy 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04C—ELECTROMECHANICAL CLOCKS OR WATCHES
- G04C10/00—Arrangements of electric power supplies in time pieces
Definitions
- the present invention relates to an anti-shock transmission device for driving the rotor of an electric generator by an oscillating mass in a portable device, comprising a central shaft and an intermediate gear, of which one is likely to be rotated by mass movements oscillating and the other is coupled to the generator rotor by a kinematic link, the central shaft and the intermediate wheel having a common axis of rotation, and a spring spiral shaped having an inner end coupled to the central shaft and a outer end coupled to the intermediate wheel.
- the invention also relates to a wristwatch with an electric generator driven by a mass oscillating via such a transmission device.
- Such a device can be used in particular in a device of small volume worn by a user whose movements will cause the mass to swing oscillating, which is usually rotary.
- This is for example, but not limitatively, of a wristwatch whose watch movement and / or others functional elements are powered by an energy accumulator charged by the electric generator.
- the oscillating mass generally rotates at a speed fairly low in normal operation and the generator rotor should rotate at high speed to produce sufficient electrical voltage it is necessary to use a multiplying transmission between these two organs.
- the required transmission ratio is in the range of 100 and it is usually obtained by means of a two-stage gear transmission.
- Such an arrangement may be damaged in the event of an impact caused by example by an accidental fall of the device and producing a very strong acceleration of the oscillating mass.
- their inertia creates a non-resistant torque negligible, due to the high transmission ratio.
- Such a shock can thus permanently damage the transmission or generator. This is why various anti-shock devices have been proposed for such a transmission.
- the object of the present invention is to improve a transmission device anti-shock of this kind, avoiding the need for friction damping and creating a simple and inexpensive construction that prevents breakage of the spring or its attachments when the device is struck by a certain amount of force, for example example (but not limited to) up to the value of 5,000 g prescribed by the standard ISO 1413.
- the invention relates to an anti-shock transmission device for genre indicated in the preamble, characterized in that the central shaft has a series notches distributed around its periphery and in that the inner end of the spring is arranged to engage in any one of said notches by the elasticity of the spring and being able to free itself from the notch when it is subjected to sufficient force in at least one direction of rotation of the device.
- each notch has an inclined flank and the inner end of the spring has an inward projecting portion, capable of abutting against said inclined flank for receive said force and slide over it as soon as said force exceeds a limit value.
- Mechanism 1 is constructed in a conventional manner. Its bearing support central 6, fixed to the plate 3 by means of a screw 7 and a tubular nut 8, supports a toothed wheel 10 by a ball bearing 11.
- the semi-circular oscillating mass 2 is fixed to the toothed wheel 10 by means of a ring 12 and can rotate around of the central axis 13 of the watch.
- the rotor 4 of the generator comprises a permanent magnet 14 fixed on a shaft 15 provided with a pinion 16.
- the pivots at the end of the shaft 15 are mounted by respective stones 17 and 18 in the plate 3 and in a bridge 19 which is fixed to the stator 20 of the generator by means of feet 21.
- the magnet 14 of the rotor rotates in a recess 22 of the stator.
- the transmission device 5 carries a central shaft 24 provided with a pinion 25 and which meshes with the teeth 26 of the wheel 10, an intermediate wheel formed by a barrel 27 provided with an external toothing 28 which meshes with the pinion 16 of the rotor 4, and a spiral spring 30 which connects elastically in rotation the shaft 24 and the barrel 27.
- the shaft 24 is rotatably mounted in the plate 3 and the bridge 19 by stones respectively 31 and 32 to rotate around an axis 33.
- the barrel 27 will be described in more detail with reference to Figures 2 to 6.
- the figure 3 shows the shape of the spiral spring 30 in the rest state, before it is mounted in the barrel 27.
- Its inner end has a bent portion 34 at an angle obtuse 35 of about 135 ° with the adjacent part of the first inner turn 36 of the spring.
- the bent part 34 has a free end 37.
- the outer end 38 of the spring is welded to an anchor plate 39.
- the spring 30 is formed of a steel blade with a section of 0.04 x 0.5 mm and present at rest between its two ends, 8.5 turns which are separated from each other by an interval.
- the inner coil 36 has a diameter of about 1.3 mm and the outer coil 40 has a diameter of about 3.4 mm.
- spiral springs of this kind are usually made in groups of three to obtain the desired interval between the turns at rest.
- the springs are formed by winding the three blades around a mandrel with three pliers to hold the ends interior of the springs, then removing internal tensions by treatment thermal. This process automatically creates the bent part 34 at the end of each spring, i.e. obtaining this end shape requires no additional operation.
- the barrel 27 has a part molded plastic comprising a cylindrical drum 41, a flat bottom 42 which pivots around a cylindrical seat 43 of the shaft 24, the toothing 28 around the periphery of the barrel 41, as well as three feet 44 used to fix a cover 45 which constitutes the face upper barrel and which pivots around a bearing 46 of the shaft 24.
- the courvercle is deleted in Figures 5 to 6 to show the inside of the barrel.
- the plaque anchor 39 of the spring 30 is locked in a recess 47 of the drum 41.
- the central shaft 24 has an enlarged part 50 provided with a series of notches 51 distributed around its periphery.
- four notches 51 are provided having, in a plane perpendicular to the shaft 24, an asymmetrical profile substantially V-shaped, the most branch long forms an inclined flank 52 (FIG. 5), while its other flank 53 extends approximately radially to an edge 54 of the notch.
- the spring 30 can rest on spans 55 in an arc of a circle which are bordered by two flanges 56 ( Figure 2) to guide the spring.
- the defined diameter by the spans 55 is slightly larger than that of the first turn 36 of the spring at rest, so that the elasticity of the spring tends to engage its end angled 34 in any one of the notches 51 and to lightly tighten the first turn 36 on the bearing surfaces 55 of the tree.
- the oscillating mass 2 When the watch does not undergo movement, the oscillating mass 2 is stopped and the transmission device 5 does not transmit any torque to the rotor 4 of the generator, except possibly a low magnet positioning torque 14 relative to the stator 20. The device 5 is then in the equilibrium position shown in Figure 4.
- the mass oscillating 2 starts to rotate in any direction and causes the shaft to rotate 24 via the toothing 26 and the pinion 25.
- the spring 30 is then energized and transmits a torque to the barrel 27, which also starts to rotate and causes it to rotate fast the rotor 4 via the toothing 28 and the pinion 16.
- the device reaches the position shown in FIG. 7, where the inclined flank 52 exerts a force F, approximately perpendicular to the sidewall 52, on the end 37 of the spring. If the force F exceeds a certain limit capable of pushing the end 37 outwards, it slides on the inclined flank 52 towards the outside and escapes from the notch from the position of Figure 8, so that the spring and the barrel rotate slower than the tree.
- the end 37 of the spring thanks to the elasticity of the latter, will tend to automatically engage in one of the following notches 51 and there remain engaged to transmit torque again to the spring when the dynamic conditions will allow this.
- FIG. 6 represents a situation where the torque applied by the shaft 24 to the spring in direction B has such a high value that all the turns are pressed against the shaft, except the end part of the outer coil.
- the absolute value of this torque is substantially the same as in the case illustrated in Figure 5, but the force resulting between the outer end 38 of the spring and the anchor plate 39 is that a fraction of the force to be transmitted for the same torque at the spans 55 of the tree, because it acts with a much larger lever arm.
- a rupture of the weld between the elements 38 and 39 is not to fear for such a value of the torque to be transmitted.
- a sliding flange system of the type well known for barrels driving mechanical watch movements.
- the scope of the present invention is not limited to watches and can be extended in particular to all portable devices fitted with a generator electric, for example mobile phones, measuring devices or medical devices.
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electromechanical Clocks (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Electric Clocks (AREA)
Abstract
Description
- la figure 1 est une vue en coupe verticale d'un ensemble générateur électrique pour une montre, dans lequel un dispositif de transmission anti-choc selon l'invention est interposé entre un mécanisme à masse oscillante et une micro-génératrice électrique;
- la figure 2 est une vue en coupe agrandie du dispositif de transmission, suivant la ligne II-II de la figure 4;
- la figure 3 représente le ressort à l'état de repos;
- la figure 4 est une vue en plan de l'objet de la figure 2, après enlèvement du couvercle de barillet, et montre le dispositif de transmission en position d'équilibre;
- la figure 5 est une vue analogue à la figure 4 et montre le dispositif de transmission lorsqu'il transmet un couple maximal dans un premier sens;
- la figure 6 est une vue analogue à la figure 4 et montre le dispositif de transmission lorsqu'il transmet un couple maximal dans le sens opposé; et
- les figures 7 et 8 sont des vues analogues à la figure 5 et illustrent le fonctionnement du dispositif de transmission lorsque le couple maximal dans le premier sens tend à être dépassé.
Claims (11)
- Dispositif de transmission antichoc pour l'entraínement du rotor (4) d'une génératrice électrique par une masse oscillante (2) dans un appareil portable, comportant :un arbre central (24) et une roue intermédiaire dentée (28), dont l'un est susceptible d'être entraíné en rotation par des mouvements de la masse oscillante et l'autre est couplé au rotor de la génératrice par une liaison cinématique, l'arbre central et la roue intermédiaire ayant un axe de rotation commun (33), etun ressort (30) en forme de spirale ayant une extrémité intérieure couplée à l'arbre central et une extrémité extérieure couplée à la roue intermédiaire,
- Dispositif selon la revendication 1, caractérisé en ce que chaque échancrure (51) comporte un flanc incliné (52) et en ce que l'extrémité intérieure du ressort comporte une partie (34) saillante vers l'intérieur, apte à buter contre ledit flanc incliné pour recevoir ladite force et à glisser sur lui lorsque ladite force dépasse une valeur limite.
- Dispositif selon la revendication 2, caractérisé en ce que la partie saillante du ressort est formée par une partie coudée (34) ayant une extrémité libre (37) apte à buter contre ledit flanc incliné.
- Dispositif selon la revendication 3, caractérisé en ce que la partie coudée (34) forme un angle obtus (35) avec la partie adjacente du ressort, la face intérieure dudit angle étant agencée pour prendre appui contre un bord (54) de l'échancrure.
- Dispositif selon la revendication 2, caractérisé en ce que chaque échancrure (51) a, dans un plan perpendiculaire à l'arbre, un profil dissymétrique sensiblement en forme de V dont la branche la plus longue forme ledit flanc incliné (52).
- Dispositif selon l'une des revendications 1 à 5, caractérisé en ce que l'arbre central est muni d'un pignon (25) couplé par engrènement à la masse oscillante et en ce que la roue intermédiaire (28) est couplée par engrènement au rotor de la génératrice.
- Dispositif selon la revendication 6, caractérisé en ce que le ressort (30) est logé dans un barillet (27) comportant un tambour (41) muni d'un fond et d'un couvercle, l'extrémité extérieure (38) du ressort étant ancrée dans le tambour, et en ce que la roue intermédiaire est formée par une denture extérieure (28) sur ledit tambour.
- Dispositif selon la revendication 7, caractérisé en ce que l'arbre central (24) comporte, à l'intérieur du barillet, une partie élargie (50) dans laquelle sont ménagées lesdites échancrures (51) et comportant, entre les échancrures, des portées (55) en arcs de cercle pour l'appui du ressort.
- Dispositif selon la revendication 8, caractérisé en ce qu'une première spire intérieure (36) du ressort présente, au repos lorsque le ressort n'est pas monté sur l'arbre central, un plus petit diamètre que le diamètre défini par lesdites portées (55).
- Dispositif selon l'une des revendications 1 à 9, caractérisé en ce que l'arbre central est susceptible d'être entraíné dans les deux sens (A et B) par la masse oscillante.
- Montre-bracelet comportant une génératrice électrique entraínée par une masse oscillante via un dispositif de transmission (5) selon l'une des revendications 1 à 10.
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00204370A EP1213626B1 (fr) | 2000-12-07 | 2000-12-07 | Dispositif de transmission antichoc pour l'entraînement d'une génératrice par une masse oscillante, notamment dans une montre |
DE60042597T DE60042597D1 (de) | 2000-12-07 | 2000-12-07 | Stossfeste Übertragungsmittel zum Antrieb eines Generators durch eine Schwungmasse, insbesondere in einer Uhr |
US09/987,997 US6587401B2 (en) | 2000-12-07 | 2001-11-16 | Anti-shock transmission device for driving a generator by an oscillating weight in particular in a watch |
JP2001371011A JP4188589B2 (ja) | 2000-12-07 | 2001-12-05 | 特にウォッチにおいて振動重錘により発電器を駆動するためのアンチショック伝達装置 |
CNB011435313A CN1239968C (zh) | 2000-12-07 | 2001-12-06 | 适用于手表的用于摆动锤驱动发电机的防震传动机构 |
HK02109068A HK1047322A1 (en) | 2000-12-07 | 2002-12-13 | Anti-shock transmission device for driving a generator by an oscillating weight in particular in a watch |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP00204370A EP1213626B1 (fr) | 2000-12-07 | 2000-12-07 | Dispositif de transmission antichoc pour l'entraînement d'une génératrice par une masse oscillante, notamment dans une montre |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1213626A1 true EP1213626A1 (fr) | 2002-06-12 |
EP1213626B1 EP1213626B1 (fr) | 2009-07-22 |
Family
ID=8172391
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP00204370A Expired - Lifetime EP1213626B1 (fr) | 2000-12-07 | 2000-12-07 | Dispositif de transmission antichoc pour l'entraînement d'une génératrice par une masse oscillante, notamment dans une montre |
Country Status (6)
Country | Link |
---|---|
US (1) | US6587401B2 (fr) |
EP (1) | EP1213626B1 (fr) |
JP (1) | JP4188589B2 (fr) |
CN (1) | CN1239968C (fr) |
DE (1) | DE60042597D1 (fr) |
HK (1) | HK1047322A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9298162B2 (en) * | 2010-10-01 | 2016-03-29 | Rolex Sa | Timepiece barrel with thin disks |
DE102011106785B4 (de) * | 2011-07-06 | 2015-07-23 | JuB-Creative Product GmbH | Kinetischer Wandler |
ES2744586T3 (es) * | 2012-08-23 | 2020-02-25 | Audemars Piguet Renaud Et Papi Sa | Mecanismo de relojería con reserva de marcha extendida |
EP2765462B1 (fr) * | 2013-02-12 | 2018-04-04 | ETA SA Manufacture Horlogère Suisse | Roue de centre anti-choc |
CN104133362B (zh) * | 2013-05-01 | 2021-05-18 | 劳力士有限公司 | 钟表振荡器的摆锤的减震体 |
CN106586945B (zh) * | 2017-01-07 | 2018-02-09 | 杭州电子科技大学 | 低驱动电压的微型冲击锤 |
CN107957670B (zh) * | 2017-10-13 | 2020-03-24 | 烟台职业学院 | 一种大型机械表的智能上条机构 |
NL2021361B1 (en) * | 2018-07-20 | 2020-01-29 | Kinetron Bv | Electric low-power supply system for devices and device comprising such a low-power supply system |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB662225A (en) * | 1949-07-25 | 1951-12-05 | Junghans Geb Ag | Improvements in or relating to spring mountings for pivots in precision gears |
EP0681228A1 (fr) * | 1994-05-04 | 1995-11-08 | Eta SA Fabriques d'Ebauches | Dispositif de couplage entre une source d'énergie mécanique et une génératrice électrique dans une pièce d'horlogerie |
EP0791867A1 (fr) * | 1995-09-13 | 1997-08-27 | Citizen Watch Co. Ltd. | Petit appareil electronique equipe d'un generateur |
US6016289A (en) * | 1997-11-20 | 2000-01-18 | Eta Sa Fabriques D'ebauches | Generator driving device for an instrument of small volume |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US1276456A (en) * | 1918-08-20 | Otto Heineman Phonograph Supply Co Inc | Fastening device. | |
NL85867C (fr) | 1948-12-31 | |||
US2721627A (en) * | 1952-02-01 | 1955-10-25 | Eastman Kodak Co | Shock-absorber for spring motors |
FR2268293B3 (fr) * | 1974-04-18 | 1977-02-18 | Valroger Pierre | |
NL9001976A (nl) * | 1990-09-07 | 1992-04-01 | Kinetron Bv | Generator. |
JP3497708B2 (ja) | 1997-10-09 | 2004-02-16 | 株式会社東芝 | 半導体集積回路 |
-
2000
- 2000-12-07 EP EP00204370A patent/EP1213626B1/fr not_active Expired - Lifetime
- 2000-12-07 DE DE60042597T patent/DE60042597D1/de not_active Expired - Lifetime
-
2001
- 2001-11-16 US US09/987,997 patent/US6587401B2/en not_active Expired - Lifetime
- 2001-12-05 JP JP2001371011A patent/JP4188589B2/ja not_active Expired - Fee Related
- 2001-12-06 CN CNB011435313A patent/CN1239968C/zh not_active Expired - Fee Related
-
2002
- 2002-12-13 HK HK02109068A patent/HK1047322A1/xx not_active IP Right Cessation
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB662225A (en) * | 1949-07-25 | 1951-12-05 | Junghans Geb Ag | Improvements in or relating to spring mountings for pivots in precision gears |
EP0681228A1 (fr) * | 1994-05-04 | 1995-11-08 | Eta SA Fabriques d'Ebauches | Dispositif de couplage entre une source d'énergie mécanique et une génératrice électrique dans une pièce d'horlogerie |
EP0791867A1 (fr) * | 1995-09-13 | 1997-08-27 | Citizen Watch Co. Ltd. | Petit appareil electronique equipe d'un generateur |
US6016289A (en) * | 1997-11-20 | 2000-01-18 | Eta Sa Fabriques D'ebauches | Generator driving device for an instrument of small volume |
Also Published As
Publication number | Publication date |
---|---|
DE60042597D1 (de) | 2009-09-03 |
JP2002250781A (ja) | 2002-09-06 |
US20020071348A1 (en) | 2002-06-13 |
CN1239968C (zh) | 2006-02-01 |
EP1213626B1 (fr) | 2009-07-22 |
US6587401B2 (en) | 2003-07-01 |
JP4188589B2 (ja) | 2008-11-26 |
CN1357804A (zh) | 2002-07-10 |
HK1047322A1 (en) | 2003-02-14 |
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