EP3218770B1 - Motor member for a clock movement - Google Patents
Motor member for a clock movement Download PDFInfo
- Publication number
- EP3218770B1 EP3218770B1 EP15771056.7A EP15771056A EP3218770B1 EP 3218770 B1 EP3218770 B1 EP 3218770B1 EP 15771056 A EP15771056 A EP 15771056A EP 3218770 B1 EP3218770 B1 EP 3218770B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- spring
- barrel
- drum
- motor member
- clock movement
- 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.)
- Active
Links
- 230000002093 peripheral effect Effects 0.000 claims description 5
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000014759 maintenance of location Effects 0.000 description 6
- 238000010276 construction Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 210000000056 organ Anatomy 0.000 description 1
Images
Classifications
-
- 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
- G04B1/00—Driving mechanisms
- G04B1/10—Driving mechanisms with mainspring
- G04B1/18—Constructions for connecting the ends of the mainsprings with the barrel or the arbor
Definitions
- the invention relates to the field of timepieces, and more specifically a motor of a watch movement to accumulate and restore the energy necessary for the movement.
- the invention also relates to a movement and a timepiece equipped with such a motor member.
- a driving member for a timepiece consists of a barrel formed by a circular toothed disc and a drum closed by a cover.
- the barrel rotates freely on a shaft and receives a spring, generally formed of a ribbon wound on itself in a spiral around the barrel shaft, to which it is hooked by an inner coil through a bung, the outer turn being secured to the barrel drum in a fixed manner or in the form of friction.
- Some barrels are built without lids to gain thickness.
- the spring may tend to come out of the drum and come into contact with an element of the movement of the watch, such as a ratchet for example. This contact interferes with the proper functioning of the watch by creating friction and consequently variations and losses of torque.
- the document DE 19 05 046 discloses a barrel for a clockwork movement, the barrel comprising a drum closed by a lid, the drum receiving a spring provided with a sliding flange.
- the drum has on its inner circular wall a shoulder configured to receive the sliding flange.
- the document US 2,880,570 also described a barrel comprising a drum closed by a cover and receiving a motor spring provided with a sliding flange.
- the drum also has on its inner circular wall a shoulder configured to receive the sliding flange.
- An object of the present invention is to overcome all or part of the disadvantages mentioned above by providing a motor member for axially maintaining the spring in the barrel regardless of the type of barrel.
- an object of the invention is to provide a spring having good axial retention within the barrel.
- the invention also aims, at least in a particular embodiment, to provide a drive member which is simple to implement and inexpensive.
- Another object of the invention is to provide a compact drive member to maintain the spring in the barrel and also to reduce the thickness of the watch movement.
- the invention relates to a motor unit for a watch movement provided with a barrel comprising a drum, and at least one spring, the spring being wound inside the barrel, the inner coil of the spring being coupled to a bung, and the outer coil of the spring being in contact with the circular wall of the drum.
- the drum comprises on its inner circular wall axial retention means of the spring in the form of a peripheral groove, and the spring comprises complementary holding means configured to cooperate with the axial holding means so as to maintain the spring axially within the barrel.
- such a motor unit for a clockwork movement makes it possible to improve the stability of the torque provided by the barrel as well as the efficiency of the barrel, the axial retention of the spring in the barrel preventing the spring from coming out of the drum and of come into contact with an element of the drive member, typically the cover or the ratchet.
- the invention also relates to a watch movement comprising at least one motor unit according to the invention.
- the motor unit 100 for a watch movement is provided with a barrel 1 comprising a bottom 10 integral with a drum 11.
- a spring 2 is wound inside the barrel 1, the inner coil 21 of the spring 2 being coupled to a bung 4 disposed around a shaft 5, and the outer coil 20 of the spring 2 being in contact with the circular wall of the drum 11.
- the drum 11 comprises on its inner circular wall axial retention means of the spring 2, and the spring 2 comprises complementary holding means configured to cooperate with the axial holding means so as to maintain the spring 2 axially. within the barrel 1.
- the spring 2 has at its outer turn 20 a lowering so that the height h of the outer turn 20 is lower than the rest of the spring 2 which has a height H.
- the spring 2 can, for example, be lowered on a turn and 15 ° so that the outer turn 20 comes to be housed integrally in the shoulder 13 peripheral.
- the drum 11 has a shoulder 13 on its inner circular wall, the shoulder 13 having a height substantially identical to the height h of the outer turn 20 so as to maintain axially the outer turn 20, and implicitly the spring 2.
- the spring 2 can be equipped with a sliding flange 23 on the inner face of the outer turn 20, so as to hold the spring against the inner wall of the drum 11.
- the motor member 100 has a barrel 1 without lid, a ratchet 3 being disposed above of the barrel 1 and drives the bung 4 disposed around the shaft 5.
- the outer turn 20 is disposed at the shoulder 13.
- the spring 2 whose outer turn 20 has on its outer face a plurality of lugs 22 intended to cooperate with a peripheral groove 12 machined on the inner circular wall of the drum 11.
- the lugs 22 are arranged equidistant from each other on the outer face of the outer turn 20 to ensure a better axial retention of the spring 2.
- the spring 2 can be equipped with a sliding flange 23 on the inner face of the outer turn 20, so as to hold the spring against the inner wall of the drum 11.
- the spring 2 can be made in one piece and is in the form of a ribbon.
- the spring can thus be mounted on the bung 4 around the shaft of the barrel.
- the spring 2 may have a height of 1.30 mm, this height may be slightly greater than that of the barrel as shown in FIG. figure 2 .
- the lugs 22 are located in a transverse plane passing through the center of the spring, and may have a diameter of between 0.4mm and 0.6m, and a depth of between 0.05mm and 0.1mm.
- the drum 11 comprises on its inner circular wall a peripheral groove 12 configured to at least partially receive the lug 22 of the spring 2 so as to maintain the spring 2 axially within the barrel 1.
- the inner circular wall of the drum 11 comprises a shoulder adapted to at least partially retain the lug 22 of the spring 2, the shoulder extending preferably from the bottom 10 of the barrel 1 until halfway up the inner circular wall of the drum 11.
- the motor member 100 has a barrel 1 without a cover, a ratchet 3 being disposed above the barrel 1 and causes the plug 4 disposed around the shaft 5.
- the spring 2 can slightly exceed the barrel 1, thus limiting the size of the barrel 1.
- the invention also relates to a watch movement and a timepiece equipped with a motor member 100 according to the invention.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Connection Of Motors, Electrical Generators, Mechanical Devices, And The Like (AREA)
- Electromechanical Clocks (AREA)
Description
L'invention concerne le domaine des pièces d'horlogerie, et plus précisément un organe moteur d'un mouvement d'horlogerie pour accumuler et restituer l'énergie nécessaire à la marche du mouvement.The invention relates to the field of timepieces, and more specifically a motor of a watch movement to accumulate and restore the energy necessary for the movement.
L'invention concerne également un mouvement et une pièce d'horlogerie équipés d'un tel organe moteur.The invention also relates to a movement and a timepiece equipped with such a motor member.
De manière classique, un organe moteur pour pièce d'horlogerie est constitué d'un barillet formé par un disque circulaire denté et d'un tambour fermé par un couvercle. Le barillet tourne librement sur un arbre et reçoit un ressort, généralement formé d'un ruban enroulé sur lui-même en spirale autour de l'arbre de barillet, auquel il est accroché par une spire intérieure par le biais d'une bonde, la spire extérieure étant solidaire du tambour du barillet de manière fixe ou sous forme de friction.In a conventional manner, a driving member for a timepiece consists of a barrel formed by a circular toothed disc and a drum closed by a cover. The barrel rotates freely on a shaft and receives a spring, generally formed of a ribbon wound on itself in a spiral around the barrel shaft, to which it is hooked by an inner coil through a bung, the outer turn being secured to the barrel drum in a fixed manner or in the form of friction.
Certains barillets sont construits sans couvercles de manière à gagner en épaisseur. Cependant, dans de tels barillets, le ressort peut avoir tendance à sortir du tambour et venir en contact avec un élément du mouvement de la montre, comme un rochet par exemple. Ce contact nuit au bon fonctionnement de la montre en créant des frottements et par conséquent des variations et pertes de couple.Some barrels are built without lids to gain thickness. However, in such barrels, the spring may tend to come out of the drum and come into contact with an element of the movement of the watch, such as a ratchet for example. This contact interferes with the proper functioning of the watch by creating friction and consequently variations and losses of torque.
Pour pallier à cet inconvénient, certaines constructions mettent en oeuvre un tambour avec une face intérieure présentant une surface conique afin de contraindre le ressort vers le fond du barillet. Il apparaît que cette contrainte n'est pas suffisante dans le cas de barillets ayant de grands diamètres ou ayant des couples élevés.To overcome this drawback, some constructions implement a drum with an inner face having a conical surface to constrain the spring towards the bottom of the barrel. It appears that this constraint is not sufficient in the case of barrels having large diameters or having high torques.
Le document
Le document
Dans ces documents de l'art antérieur seule la bride est logée dans un épaulement, ce qui ne permet pas un maintien axial correct du ressort, en particulier lorsque celui-ci est en mouvement. De plus, ces deux documents décrivent un tambour muni d'un couvercle, ce qui augmente leur épaisseur et rend difficile leur utilisation dans des mouvements dits compacts.In these documents of the prior art only the flange is housed in a shoulder, which does not allow a correct axial retention of the spring, especially when it is in motion. In addition, these two documents describe a drum with a lid, which increases their thickness and makes it difficult to use them in so-called compact movements.
Un but de la présente invention est de pallier tout ou partie des inconvénients cités précédemment en fournissant un organe moteur permettant de maintenir axialement le ressort dans le barillet quelle que soit le type de barillet.An object of the present invention is to overcome all or part of the disadvantages mentioned above by providing a motor member for axially maintaining the spring in the barrel regardless of the type of barrel.
Plus précisément, un but de l'invention est de fournir un ressort ayant un bon maintien axial au sein du barillet.More specifically, an object of the invention is to provide a spring having good axial retention within the barrel.
L'invention a également pour but, au moins dans un mode de réalisation particulier, de fournir un organe moteur qui soit simple à mettre en oeuvre et peu coûteux.The invention also aims, at least in a particular embodiment, to provide a drive member which is simple to implement and inexpensive.
Un autre but de l'invention est de fournir un organe moteur compact permettant de bien maintenir le ressort dans le barillet et permettant également de réduire l'épaisseur du mouvement horloger.Another object of the invention is to provide a compact drive member to maintain the spring in the barrel and also to reduce the thickness of the watch movement.
A cet effet, l'invention concerne un organe moteur pour mouvement d'horlogerie muni d'un barillet comprenant un tambour, et au moins un ressort, le ressort étant enroulé à l'intérieur du barillet, la spire intérieure du ressort étant couplée à une bonde, et la spire extérieure du ressort étant en contact avec la paroi circulaire du tambour.For this purpose, the invention relates to a motor unit for a watch movement provided with a barrel comprising a drum, and at least one spring, the spring being wound inside the barrel, the inner coil of the spring being coupled to a bung, and the outer coil of the spring being in contact with the circular wall of the drum.
Selon l'invention, le tambour comprend sur sa paroi circulaire interne des moyens de maintien axiaux du ressort sous la forme d'une rainure périphérique, et le ressort comprend des moyens de maintien complémentaires configurés pour coopérer avec les moyens de maintien axiaux de manière à maintenir axialement le ressort au sein du barillet.According to the invention, the drum comprises on its inner circular wall axial retention means of the spring in the form of a peripheral groove, and the spring comprises complementary holding means configured to cooperate with the axial holding means so as to maintain the spring axially within the barrel.
Grâce à ces caractéristiques, un tel organe moteur pour mouvement d'horlogerie permet d'améliorer la stabilité du couple fourni par le barillet ainsi que le rendement du barillet, le maintien axial du ressort dans le barillet empêchant le ressort de sortir du tambour et de venir en contact avec un élément de l'organe moteur, typiquement le couvercle ou le rochet.Thanks to these characteristics, such a motor unit for a clockwork movement makes it possible to improve the stability of the torque provided by the barrel as well as the efficiency of the barrel, the axial retention of the spring in the barrel preventing the spring from coming out of the drum and of come into contact with an element of the drive member, typically the cover or the ratchet.
Conformément à d'autres variantes avantageuses de l'invention :
- les moyens de maintien axiaux comprennent au moins un ergot radial sur la face extérieure de la spire extérieure, l'ergot logeant au moins partiellement dans la rainure ;
- le ressort comprend plusieurs ergots radiaux répartis sur la face extérieure de la spire extérieure ;
- les ergots sont équidistants les uns des autres ;
- les ergots sont situés dans un plan transverse passant par le centre du ressort ;
- le ressort comprend sur la face interne de sa spire extérieure une bride glissante.
- the axial holding means comprise at least one radial lug on the outer face of the outer turn, the lug housing at least partially in the groove;
- the spring comprises a plurality of radial lugs distributed on the outer face of the outer coil;
- the lugs are equidistant from each other;
- the lugs are located in a transverse plane passing through the center of the spring;
- the spring comprises on the inner face of its outer turn a sliding flange.
L'invention concerne également un mouvement d'horlogerie comprenant au moins un organe moteur conforme à l'invention.The invention also relates to a watch movement comprising at least one motor unit according to the invention.
D'autres caractéristiques et avantages de l'invention apparaîtront plus clairement à la lecture de la description suivante d'un mode de réalisation particulier de l'invention, donné à titre de simple exemple illustratif et non limitatif, et des figures annexées, parmi lesquelles :
- la
figure 1 est une vue en perspective d'un ressort selon un premier mode de réalisation ne faisant pas partie de l'invention ; - la
figure 2 est une vue en coupe selon le plan médian vertical d'un organe selon un premier mode de réalisation ne faisant pas partie de l'invention ; - la
figure 3 est une vue en perspective d'un ressort conforme à l'invention selon un second mode de réalisation ; - la
figure 4 est une vue en coupe selon le plan médian vertical d'un organe moteur conforme à l'invention selon un second mode de réalisation.
- the
figure 1 is a perspective view of a spring according to a first embodiment not forming part of the invention; - the
figure 2 is a sectional view along the vertical median plane of a member according to a first embodiment not forming part of the invention; - the
figure 3 is a perspective view of a spring according to the invention according to a second embodiment; - the
figure 4 is a sectional view along the vertical median plane of a motor member according to the invention according to a second embodiment.
Un organe moteur conforme à l'invention va maintenant être décrit dans ce qui suit faisant référence conjointement aux
Tel qu'illustré aux
Selon l'invention, le tambour 11 comprend sur sa paroi circulaire interne des moyens de maintien axiaux du ressort 2, et le ressort 2 comprend des moyens de maintien complémentaires configurés pour coopérer avec les moyens de maintien axiaux de manière à maintenir axialement le ressort 2 au sein du barillet 1.According to the invention, the
Selon un premier mode de réalisation, non compris dans l'invention, illustrés aux
Le tambour 11 présente un épaulement 13 sur sa paroi circulaire interne, l'épaulement 13 ayant une hauteur sensiblement identique à la hauteur h de la spire extérieure 20 de manière à maintenir axialement la spire extérieure 20, et implicitement le ressort 2.The
Le ressort 2 peut être équipé d'une bride glissante 23 sur la face interne de la spire extérieure 20, de manière à maintenir le ressort contre la paroi interne du tambour 11.The
Comme on peut l'observer à la
Selon un second mode de réalisation, illustré aux
Le ressort 2 peut être équipé d'une bride glissante 23 sur la face interne de la spire extérieure 20, de manière à maintenir le ressort contre la paroi interne du tambour 11.The
Le ressort 2 peut être réalisé de manière monobloc et se présente sous la forme d'un ruban. Le ressort peut ainsi être monté sur la bonde 4 autour de l'arbre du barillet. Le ressort 2 peut présenter une hauteur de 1.30mm, cette hauteur pouvant être légèrement supérieure à celle du barillet comme représenté à la
Les ergots 22 sont situés dans un plan transverse passant par le centre du ressort, et peuvent présenter un diamètre compris entre 0.4mm et 0.6m, et une profondeur comprise entre 0.05mm et 0.1mm.The
Selon l'invention, le tambour 11 comprend sur sa paroi circulaire interne une rainure 12 périphérique configurée pour recevoir au moins partiellement l'ergot 22 du ressort 2 de manière à maintenir axialement le ressort 2 au sein du barillet 1.According to the invention, the
Selon un autre mode de réalisation de l'invention, la paroi circulaire interne du tambour 11 comprend un épaulement apte à retenir au moins partiellement l'ergot 22 du ressort 2, l'épaulement s'étendant préférentiellement depuis le fond 10 du barillet 1 jusqu'à mi-hauteur de la paroi circulaire interne du tambour 11.According to another embodiment of the invention, the inner circular wall of the
Comme on peut l'observer à la
L'invention concerne également un mouvement d'horlogerie ainsi qu'une pièce d'horlogerie équipés d'un organe moteur 100 conforme à l'invention.The invention also relates to a watch movement and a timepiece equipped with a
Grâce à ces différents aspects de l'invention, on dispose d'un organe moteur compact permettant de bien maintenir le ressort dans le barillet et permettant également de réduire l'épaisseur du mouvement horloger.Thanks to these different aspects of the invention, there is a compact motor member for maintaining the spring in the barrel and also to reduce the thickness of the watch movement.
Bien entendu, la présente invention ne se limite pas à l'exemple illustré et est susceptible de diverses variantes et modifications qui apparaîtront à l'homme de l'art.Of course, the present invention is not limited to the illustrated example and is susceptible of various variations and modifications that will occur to those skilled in the art.
- 1.1.
- Barillet,barrel,
- 10.10.
- Fond,Background,
- 11.11.
- Tambour,Drum,
- 12.12.
- Rainure,Groove,
- 13.13.
- Epaulement,shoulder,
- 2.2.
- Ressort,Spring,
- 20.20.
- Spire extérieure,Outdoor spire,
- 21.21.
- Spire intérieure,Inner spire,
- 22.22.
- Ergot,ergot,
- 23.23.
- Bride glissante,Slippery flange,
- 3.3.
- Rochet,Ratchet,
- 4.4.
- Bonde,Crowded,
- 5.5.
- Arbre,Tree,
- 100.100.
- Organe moteur,Motor organ,
- h.h.
- Hauteur spire extérieure,Outside turn height,
- H.H.
- Hauteur ressort.Spring height.
Claims (7)
- Motor member (100) for a clock movement equipped with a barrel (1) comprising a drum (11), and at least one spring (2), the spring (2) being wound inside the barrel (1), the inner coil (21) of the spring (2) being coupled to a core (4), and the outer coil (20) of the spring (2) being in contact with the inner circular wall of the drum (11), the drum (11) comprising, on the inner circular wall thereof, axial means for retaining the spring (2) in the form of a peripheral groove, and the spring (2) comprising complementary retaining means configured to engage with the axial retaining means so as to axially maintain the spring (2) inside the barrel (1).
- Motor member (100) for a clock movement according to claim 1, wherein the axial retaining means comprise at least one radial catch (22) on the outer face of the outer coil (20), the catch being housed at least partially inside the groove.
- Motor member (100) for a clock movement according to either claim 1 or claim 2, wherein the spring (2) comprises a plurality of radial catches (22) distributed on the outer face of the outer coil (20).
- Motor member (100) for a clock movement according to any of claims 1 to 3, wherein the catches (22) are equally spaced from one another.
- Motor member (100) for a clock movement according to any of claims 1 to 4, wherein the catches (22) are located in a transverse plane passing through the centre of the spring (2).
- Motor member (100) for a clock movement according to any of the preceding claims, wherein the spring (2) comprises a slipping bridle (23) on the inner face of the outer coil thereof.
- Clock movement comprising at least one motor member (100) according to one of the preceding claims.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP14192690.7A EP3021172A1 (en) | 2014-11-11 | 2014-11-11 | Motor member for a clock movement |
PCT/EP2015/071262 WO2016074831A1 (en) | 2014-11-11 | 2015-09-16 | Driving mechanism for a clock movement |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3218770A1 EP3218770A1 (en) | 2017-09-20 |
EP3218770B1 true EP3218770B1 (en) | 2019-04-24 |
Family
ID=51868148
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14192690.7A Withdrawn EP3021172A1 (en) | 2014-11-11 | 2014-11-11 | Motor member for a clock movement |
EP15771056.7A Active EP3218770B1 (en) | 2014-11-11 | 2015-09-16 | Motor member for a clock movement |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP14192690.7A Withdrawn EP3021172A1 (en) | 2014-11-11 | 2014-11-11 | Motor member for a clock movement |
Country Status (2)
Country | Link |
---|---|
EP (2) | EP3021172A1 (en) |
WO (1) | WO2016074831A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH712519B8 (en) * | 2016-06-01 | 2023-03-31 | Richemont Int Sa | Engine member for a timepiece. |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US374359A (en) * | 1887-12-06 | Chakles t | ||
CH151392A (en) * | 1930-09-17 | 1931-12-15 | Tavannes Watch Co Sa | Barrel. |
DE1905046A1 (en) * | 1969-02-01 | 1970-08-06 | Durowe Gmbh | Barrel for wristwatches with automatic winding |
-
2014
- 2014-11-11 EP EP14192690.7A patent/EP3021172A1/en not_active Withdrawn
-
2015
- 2015-09-16 EP EP15771056.7A patent/EP3218770B1/en active Active
- 2015-09-16 WO PCT/EP2015/071262 patent/WO2016074831A1/en active Application Filing
Non-Patent Citations (1)
Title |
---|
None * |
Also Published As
Publication number | Publication date |
---|---|
EP3218770A1 (en) | 2017-09-20 |
WO2016074831A1 (en) | 2016-05-19 |
EP3021172A1 (en) | 2016-05-18 |
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