EP0308879B1 - Rouage à deux moteurs, en particulier pour montre réceptrice - Google Patents

Rouage à deux moteurs, en particulier pour montre réceptrice Download PDF

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Publication number
EP0308879B1
EP0308879B1 EP88115449A EP88115449A EP0308879B1 EP 0308879 B1 EP0308879 B1 EP 0308879B1 EP 88115449 A EP88115449 A EP 88115449A EP 88115449 A EP88115449 A EP 88115449A EP 0308879 B1 EP0308879 B1 EP 0308879B1
Authority
EP
European Patent Office
Prior art keywords
wheel
light
work according
beam path
motors
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.)
Expired - Lifetime
Application number
EP88115449A
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German (de)
English (en)
Other versions
EP0308879A2 (fr
EP0308879B2 (fr
EP0308879A3 (fr
Inventor
Wolfgang Ganter
Jürgen Allgaier
Wolfram Hodapp
Arthur Kopf
Roland Maurer
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.)
Junghans Uhren GmbH
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Junghans Uhren GmbH
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Publication date
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Application filed by Junghans Uhren GmbH filed Critical Junghans Uhren GmbH
Publication of EP0308879A2 publication Critical patent/EP0308879A2/fr
Publication of EP0308879A3 publication Critical patent/EP0308879A3/fr
Publication of EP0308879B1 publication Critical patent/EP0308879B1/fr
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    • 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
    • G04C3/14—Electromechanical clocks or watches independent of other time-pieces and in which the movement is maintained by electric means incorporating a stepping motor
    • G04C3/143—Means to reduce power consumption by reducing pulse width or amplitude and related problems, e.g. detection of unwanted or missing step
    • 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
    • G04C3/001—Electromechanical switches for setting or display

Definitions

  • the invention relates to a gear train according to the preamble of claim 1.
  • Such a radio clock is known from EP-A 0 180 880 (corresponding to US-A 4,645,357).
  • a motor drives the part of the gear train via which the minute wheel and the hour wheel are coupled to one another, while the second wheel is assigned its own second motor.
  • each motor is assigned its own light barrier, and with regard to the adjustment requirements, complex optical deflection light guides are required if the transmitting and receiving elements of the two light barriers are arranged on the same circuit board to simplify the electrical circuit should be.
  • Such a two-motor radio clock has proven itself as a consumer clock. However, it still has functional manufacturing disadvantages.
  • the adjustment of the pinhole gears is critical so that the rotation of the hour wheel coupled to the minute hand movement leads to a response of this light barrier that is precise to one motor step, so that the hour hand and the minute hand simultaneously have their reference position when the light barrier responds.
  • the movement resolution of the minute hand which is desirable for clear dial positions, is limited so that the hour hand does not take too long to revolve (as is necessary for winter time or time zone correction), since, on the other hand, the speed of rotation of the minute wheel is not increased arbitrarily for gearbox reasons can.
  • the power distribution is not optimal with regard to the required torques.
  • the invention has for its object to develop a generic type of gear in such a way that more favorable conditions for screwing the pointers into defined positions can be realized in terms of energy and time requirements and at the same time simpler possibilities for the realization of the light barriers and for gear function tests are opened.
  • each of the motors only has to deliver a relatively low torque.
  • the hour bike is operated from its own motor, which at the same time enables a high degree of movement resolution (number of steps for the further movement by an hour division) without taking into account the gear conditions of the rest of the gear train.
  • the other motor is to be designed anyway for the torque required to move the longest of all hands, the second hand, and the movement of the minute hand derived therefrom in the gear ratio 60: 1 does not represent any noticeable additional load for the other motor in these reduction conditions from the own drive of the second hand minute hand wheel part a fine step division and thus a very precise minute display on the minute track of the watch, because the movement from one minute mark to the next minute mark is resolved to 60 increments.
  • the separate drive of the hour wheel also opens up a particularly simple implementation option for the light barrier for angular position detection, because the query of the position of the hour indicator is not necessary for one motor step, so that the position of a single aperture hole in the hour wheel is simply queried by means of a compact reflex light barrier can be. Since no other wheels of the factory are included in this light barrier query, the hour wheel can be set in any angular position, regardless of the current position of any other wheels of the factory, i.e. without the need for a wheel pre-adjustment during factory assembly.
  • Transmitter and receiver of the light barriers can be mounted on a common circuit board, which also carries the other circuits, to reduce the manufacturing and assembly work, with the beam path reflectors being formed by metal mirrors on the walls of the movement housing beyond the respective sub-gear train.
  • an urgent correction of the hour display (for example for the change from summer time to winter time or to the change of time zone) can be done without impairing the momentary setting of the minute and hour hands. be carried out in an optimally short time, since this requires only the fastest possible activation of the hour wheel motor in order to carry out the corresponding number of steps. Because, accordingly, rapid advancement by 11 hours can easily be realized, the effort of a bidirectional drive for the correction by "one hour back" is eliminated without requiring unreasonably long periods of time for this correction.
  • the gear train 11 of a radio-controlled clock 10 is constructed in a movement housing 12 essentially with a floating bearing on a carrier plate 13 with axial play limitation of the bearing position by appropriate distance measurement to the housing rear wall 14, as explained in more detail in detail in US Pat. No. 4,465,378.
  • a motor 15 preferably designed as a miniature stepper motor operated in a time-keeping manner, uses its pinion 16 to drive an intermediate wheel 17 for the movement of a second wheel 18, which in turn is geared to the minute wheel 20 via a small bottom wheel 19 for reducing the movement.
  • the turning of the hour wheel 21 into a certain angular position with respect to the work housing 12 is detected by means of a reflex light barrier 27, which is designed as a compact transmitter-receiver module , if the beam path 28 - without interruption by the hour wheel 21 - is given continuously via a reflector 29.
  • This passage of the beam path 28 can only be achieved in an angular position of the hour wheel 21, namely when an aperture hole 30 formed in the hour wheel 21 has just swung in over the reflector 29 with a sufficient projection surface.
  • the reflex light barrier 27 is equipped with a capture circuit 31 which ensures the first response of the light barrier 27 when screwing in the aperture hole 30.
  • the capture circuit 31 can also be designed simply as a memory circuit which, when it is excited for the first time by the light barrier reception pulse, tilts into a signaling position and continuously delivers the detection signal to the evaluation circuit for a certain time, regardless of whether the transmission clearance causes it shortly thereafter Beam path 28 is interrupted again.
  • a deflection light barrier is shown in the design of the gear train independently of the hour wheel light barrier 27 33 is provided, the beam path 34 of which leads through structurally predetermined holes 35 in the carrier plate 13 and in a circuit board 36 held in front of it - while freeing up a space for the minute wheel 20 - and via deflection reflectors 37 on the rear housing wall 14.
  • This beam path 34 is only released if it also leads through aperture 38 of all gear wheels protruding here.
  • the defined angular position on the part of the second and minute wheel 18, 20 is reached when one of two aperture holes 38 provided in the minute wheel 20 lies simultaneously with the aperture hole 38 provided in the intermediate wheel 17 and with the aperture hole 38 provided in the second wheel 18 in the path of the steel gear 34.
  • the reflectors 29, 37 can simply be designed as small, if necessary surface-treated metal parts fastened to the corresponding wall 14, 40 of the work housing 12; the deflecting reflectors 37 can be designed as angled ends of a metal strip 41 (as indicated in the drawing) or as individual metal plates inserted into the rear wall holding slots 42.
  • the control circuits 31, 32 and the light barriers 27, 33 (irrespective of whether in a one-piece transmitter-receiver design according to the reflex light barrier 27 or with separate mounting of the transmitter and receiver as in the case the deflecting light barrier 33) so that all wiring can be implemented as printed line lamination on the printed circuit board 36.
  • This also expediently carries a test circuit 43 (possibly integrated in one of the other circuits), which delivers a pulse packet with a predetermined number of motor control pulses during commissioning. This number is predetermined so that the corresponding part of the gear train 11 would have to rotate straight out of a detection position into the next detection position (ie until the next occurrence of the uninterrupted beam path 28 or 34). As a result, it can be determined in a particularly simple manner and independently of one another for the hour hand and for the minute hand whether there are any gear or other errors in the gear train 11.
  • a time zone correction circuit 44 can be provided which, when the time zone is changed, rotates the hour stepper motor 24 (and only this) for one or more hours (30 degree angle) for further rotation of the hour wheel 21, or by rotates one hour or eleven hours to switch between summer time and winter time. Because the entire gear train 11 does not have to be moved for such hour jump time display corrections, but only the hour wheel 21 is driven, this can be achieved particularly quickly with low energy requirements.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Electromechanical Clocks (AREA)

Claims (8)

1. Horloge radio-commandée (10), comportant deux moteurs (24,15) et un rouage (11), dont des roues dotées de trous servant d'écrans à trous (30,38) s'engagent dans deux systèmes à cellule photoélectrique (27,33) associées à la commande des moteurs, en vue de la détection de positions prédéterminées de roues, et ainsi d'aiguilles, caractérisée en ce que le premier moteur (15) est couplé dynamiquement aux roues des minutes et des secondes (18,20), tandis que le deuxième moteurs (24), couplé en transmission à la roue des heures (21), est équipé, quant à l'attaque de sa commande, d'un circuit de captage (31) du signal de passage de son système à cellule photoélectrique (27).
2. Horloge radio-commandée selon la revendication 1, caractérisée en ce qu'un trajet de rayon à réflexion (28) du système à cellule photoélectrique (27) est réalisé, entre un composant émetteur-récepteur, situé sur un plaquette à circuit imprimés (36) commune, et un réflecteur (29), situé sur la paroi avant de boiter de mouvement.
3. Horloge radio-commandée selon la revendication 2, caractérisée en ce qu'un trajet de rayon à déviation (34) du système à cellule photoélectrique (33) est réalisé, entre des composants émetteur et récepteur, mutuellement décalés, situés sur une plaquette à circuit imprimé (36) commune; et des réflecteurs de déviation (37), maintenus par la paroi arrière de boîtier de mouvement (14).
4. Horloge radio-commandée selon la revendication 2 ou 3, caractérisée en ce que les réflecteurs (29,37) sont réalisés sous forme de petites tôles, positionnées sur le boîtier de mouvement (12).
5. Horloge radio-commandée selon l'une des revendications précédentes, caractérisée en ce que le circuit de captage (31) est prévu sous forme de circuit de temporisation ou de mémorisation pour des impulsions de réception des systèmes à cellules photoélectriques, pour une rotation, balayant une grande surface, du trou de diaphrragme de roue des heures (30) dans le trajet de rayon (28) de son système à cellule photoélectrique (27).
6. Horloge radio-commandée selon l'une des revendications précédentes, caractérisée en ce qu'est prévu une petite roue de fond (19), avec deux trous de diaphragme (38) diamétralement opposés, alternativement situés dans le trajet de rayon de déviation (34) du système à cellule photoélectrique de roue des minutes (33).
7. Horloge radio-commandée selon l'une des revendications précédentes caractérisée en ce que la plaquette à circuits imprimés (36) est équipée d'un circuit de test (43) destiné à commander au moins l'un des moteurs (24,15), avec un nombre prédéterminé d'impulsions de cadencement qui correspond à un tour de la roue des heures (12), ou de la roue des minutes (20).
8. Horloge radio-commandée selon l'une des revendications précédentes caractérisée par un fonctionnement, temporellement décalé des deux moteurs (15,24) et des systèmes à cellules photoélectriques (28,33) leur étant associées.
EP88115449A 1987-09-23 1988-09-21 Rouage à deux moteurs, en particulier pour montre réceptrice Expired - Lifetime EP0308879B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE8712809U DE8712809U1 (de) 1987-09-23 1987-09-23 Zweimotoren-Räderwerk, insbesondere für eine Funkuhr
DE8712809U 1987-09-23

Publications (4)

Publication Number Publication Date
EP0308879A2 EP0308879A2 (fr) 1989-03-29
EP0308879A3 EP0308879A3 (fr) 1991-03-27
EP0308879B1 true EP0308879B1 (fr) 1993-04-28
EP0308879B2 EP0308879B2 (fr) 1996-05-08

Family

ID=6812342

Family Applications (1)

Application Number Title Priority Date Filing Date
EP88115449A Expired - Lifetime EP0308879B2 (fr) 1987-09-23 1988-09-21 Rouage à deux moteurs, en particulier pour montre réceptrice

Country Status (2)

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EP (1) EP0308879B2 (fr)
DE (2) DE8712809U1 (fr)

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DD277540A1 (de) * 1988-11-30 1990-04-04 Ruhla Uhren Veb K Raederwerk
US5363348A (en) * 1992-09-04 1994-11-08 Damle Madhav N High resolution, remotely resettable time clock
GB2352061B (en) * 1996-11-06 2001-03-28 Seiko Clock Inc Timepiece movement
JP3328518B2 (ja) * 1996-11-06 2002-09-24 セイコークロック株式会社 時計機械体
EP1357448A1 (fr) * 2002-04-26 2003-10-29 Kienzle Time (Hong Kong) Limited Montre contrôlée par radio
US20040125702A1 (en) * 2002-10-21 2004-07-01 Hideki Kitajima Rotational position detection device, hand position detection device and clock using the hand position detection device

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CH646301GA3 (fr) * 1981-12-23 1984-11-30
DE3510861C2 (de) * 1984-11-09 1986-09-25 Gebrüder Junghans GmbH, 7230 Schramberg Anzeigestellungs-Detektionseinrichtung für eine Uhr, insbesondere eine Funkuhr
DE3513961A1 (de) * 1985-04-18 1986-10-23 Forschungsgesellschaft für Feingeräte-, Mikro- und Uhrentechnik e.V., 7000 Stuttgart Getriebestandserfassungseinrichtung bei einer elektronischen uhr insbesondere funkgesteuerte uhr

Also Published As

Publication number Publication date
DE8712809U1 (de) 1987-11-05
EP0308879A2 (fr) 1989-03-29
EP0308879B2 (fr) 1996-05-08
EP0308879A3 (fr) 1991-03-27
DE3880603D1 (de) 1993-06-03

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