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
  • G04B19/00—Indicating the time by visual means
  • G04B19/06—Dials
  • G04B19/14—Fastening the dials to the clock or watch plates
• • 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
  • G04B19/00—Indicating the time by visual means
  • G04B19/06—Dials
  • G04B19/065—Dials with several parts

Definitions

• the invention relates to a connecting ring for a watch dial.
• the invention also relates to a watch dial plate.
• the invention also relates to a watch dial comprising such a ring and / or such a plate.
• the invention also relates to a timepiece comprising such a dial and / or such a ring and / or such a plate.
• the invention also relates to a method of mounting or assembling such a timepiece or such a dial.
• a dial for a timepiece is described by document EP3339970.
• Such a dial comprises feet welded under a dial plate, intended for fixing the dial plate in a frame of a timepiece, for example by screws.
• This solution has the drawback of requiring a material compatible with the weld to form the dial, while requiring tedious manufacturing and assembly operations, in particular welding of the feet and then screwing into a frame.
• this solution is incompatible with certain timepieces for which the available volume is very limited and limits the passage of screws for fixing the dial, for example wristwatches equipped with multiple mechanical functions.
• the aim of the invention is to provide a connecting ring for a watch dial and / or a watch dial plate making it possible to improve the devices known from the prior art.
• the invention provides simple and robust devices which allow reliable and repeatable fixing of a watch dial plate on a connecting ring.
• a connecting ring according to the invention is defined by claim 1.
• a dial plate according to the invention is defined by claim 6.
• a dial according to the invention is defined by claim 11.
• a timepiece according to the invention is defined by claim 14.
• a method of mounting a dial according to the invention is defined by claim 15.
• FIG. 1 is a view of a first embodiment of a timepiece.
• Figure 2 is a detail view in axial section of a dial of the first embodiment.
• Figure 6 is a partial axial sectional view of a dial connecting ring of the first embodiment.
• FIG. 7 is a partial perspective view of a dial of the first embodiment, the dial being disposed near a blank of a watch movement.
• FIG. 8 is a view of a second embodiment of a timepiece.
• FIG. 9 is a first detail view in axial section of a dial of the second embodiment.
• FIG. 10 is a second detail view in axial section of a dial of the second embodiment.
• Fig. 11 is a perspective view of a dial plate of the second embodiment.
• Fig. 12 is a perspective view of a dial link ring of the second embodiment.
• Fig. 13 is a partial perspective view of a detail of a dial link ring of the second embodiment.
• a first embodiment of a timepiece 90 is described below with reference to FIGS. 1 to 7.
• the timepiece 90 is for example a watch, in particular a wristwatch.
• the timepiece 90 comprises a watch movement 30 and a watch dial 10 intended to be mounted in a timepiece case in order to protect them from the external environment.
• the watch movement 30 can be an electronic movement or a mechanical movement, in particular an automatic movement.
• the watch dial 10 comprises a dial plate 1 and a connecting ring 2 for the dial 10.
• the dial plate 1 is assembled on the connecting ring 2 by riveting and / or crimping.
• the connecting ring 2 is intended to connect the dial plate 1 to the movement 30, in particular to a blank 3 of the movement 30.
• the dial plate 1 and the connecting ring 2 are shaped to be mechanically linked or fixed to each other.
• the dial plate 1 and the connecting ring 2 are preferably shaped to be linked by a built-in link or a complete link.
• the connecting ring constitutes a connecting support or a connecting interface between the movement and the dial plate.
• the connecting ring 2 for dial 10 of a timepiece 90 comprises a first connecting portion 21 provided with plastically deformable connecting elements 210 and designed to come to rest against a second portion 11 formed on the dial plate 1.
• the dial plate 1 for dial 10 of a timepiece 90 is intended to be mounted on the connecting ring 2.
• the dial plate comprises: a first lower surface 12 intended to be positioned on the inside of the dial. the 90 timepiece,
• the second portion 11 connecting the first and the second surface and forming a peripheral contour of the dial plate.
• the second portion 11 comprises at least one third surface 110 inclined with respect to the first lower surface 12 and / or with respect to the second upper surface 13 of the dial plate 1.
• the at least one third surface 110a is adapted to cooperate. with plastically deformable connecting elements 210 designed to come to rest against the at least one third surface 110.
• the watch dial here has an axis A.
• This axis is an axis of revolution or symmetry of the dial.
• the A axis is oriented in a z direction perpendicular to the dial plate. If the dial does not have a shape of revolution or symmetrical, the axis A passes through the center of the dial (defined by a barycenter). If the dial plate is not planar, the z direction and the A axis are perpendicular to a plane passing through the first lower surface or the second upper surface. For example, such a plane can be tangent to the first lower surface or to the second upper surface. For example, such a plane can pass through the periphery of the first lower surface or by the periphery of the second upper surface.
• the connecting portion 21 is in the form of an annular portion. It protrudes, in the vertical direction z, from a horizontal or substantially horizontal support surface 211 intended to receive the support of a lateral part, or peripheral part, of the first lower surface 12 of the dial plate 1.
• the tongues 210 are three in number (more particularly visible in FIG. 5).
• the tongues are distinguished from each other with the references 210a, 210b, 210c.
• the tongues 210a, 210b, 210c are respectively provided to cooperate with the third surfaces 110a, 110b, 110c of the peripheral contour 11 of the dial plate 1 (more particularly visible in FIG. 3).
• the number of tabs may be different depending on the expected holding force of the dial plate on the connecting ring and / or depending on the construction constraints.
• the tongues 210a, 210b, 210c can be directly obtained by machining the connecting portion 21. More particularly, each of the tongues can be formed or delimited by a set of slots 214a, 214b, 214c, 214d, 214e, 214f machined within even of the connecting portion 21.
• the sets of slots are arranged on either side of each of said tabs. These slots open out at a horizontal or substantially horizontal surface 212, parallel or substantially parallel to the support surface 211, which constitutes one end of the connecting portion 21 in the vertical direction z.
• the slots form crenellations within the connecting portion 21 itself.
• the tongues 210a, 210b, 210c by virtue of their width L ’and the slots adjoining each of the tongues, are thus shaped so as to be plastically deformable in a direction perpendicular to the respective surfaces 110a, 110b, 110c of the dial plate 1. This direction is shown diagrammatically, for example, by a thick arrow in FIG. 2.
• the surfaces 110a, 110b, 110c form an angle ⁇ with the surface 111 or the axis A, with ⁇ preferably between 20 ° and 70 °, for example 60 °.
• the at least one third surface 110 is inclined at an angle ⁇ with respect to a line perpendicular to the first lower surface 12 and / or with respect to a line perpendicular to the second upper surface 13 of the dial plate. 1 with a between 20 ° and 70 °, for example a equal to 60 °.
• the surfaces 110a, 110b, 11 Oc extend at an angle b in the plane of the dial plate 1, measured from the axis A, with b preferably less than 45 °, or even preferably less than 20 °.
• these surfaces 110a, 110b, 110c thus allow angular indexing between the plate 1 and the ring 2. More preferably, these surfaces 110a, 110b, 110c are evenly distributed around the axis A. Alternatively, these surfaces 110a, 110b, 110c are not evenly distributed around the axis A, so as to constitute keying means when positioning the dial plate on the connecting ring. In other words, the third surfaces are formed in notches 113 made in the peripheral contour of the plate.
• the plate 1 can thus be mounted to bear against the surface 211 of the ring, under the effect of the plastic deformation of the tongues 210a, 210b, 210c as shown.
• the plate 1 can also comprise a surface or bearing surface 15 perpendicular to the first and second surface and defining for example a second contour of said plate, arranged between the first surface 12 and another lower surface 14. This surface 15 can thus cooperate with each other. less play with a vertical surface or opening 23 of the ring 2, so as to guide the dial plate 1 within the ring.
• the surface 212 of the ring 2 can, for example, be masked by a flange of the middle part.
• the surface intended to cooperate by contact with the surface 212 is formed under the flange of the middle part.
• the ring 2 can comprise a surface 213 perpendicular or substantially perpendicular to the first and second surfaces 12 and 13, which is provided to cooperate with a surface of the middle part which is perpendicular or substantially perpendicular to the first and second surfaces 12 and 13.
• the dial ring 2 also has the advantage of allowing the assembly of said dial on the clockwork movement without assembly screws or feet for which spaces must be provided on the upper surface of said movement.
• the ring 2 advantageously comprises a skirt 22 preferably comprising at least one elastic element 220 as shown in FIG. 7.
• this elastic element 220 extends partially over the height of the skirt 22.
• this elastic element 220 is more particularly shaped to cooperate with a protuberance 31 projecting from the periphery of a blank 3 of the movement 30.
• This elastic element 220 may, for example, be in the form of a blade embedded at its two ends and oriented tangentially relative to an axis in an axial direction.
• the skirt 22 of the connecting ring 2 also comprises a surface 222 oriented perpendicular or substantially perpendicular to the first and second surfaces.
• This surface 222 is provided to abut against a surface 33 of the blank 3 similarly oriented perpendicular or substantially perpendicular to the first and second surfaces.
• the function of these elements is to ensure angular indexing of the dial on the blank.
• the connecting ring 2 can directly cooperate with a middle part or any component of the timepiece, so as to allow the angular positioning of the dial 10 within the timepiece.
• a second embodiment of a 90 ′ timepiece is described below with reference to Figures 8 to 13.
• the 90 ’timepiece is for example a watch, in particular a wristwatch.
• the timepiece 90 ' comprises a watch movement 30' and a watch dial 10 'intended to be mounted in a timepiece case in order to protect them from the external environment.
• the watch movement 30 ′ can be an electronic movement or a mechanical movement, in particular an automatic movement.
• the 10 "watch face features a 1" dial plate and a 2 "10" dial binding ring.
• the dial plate 1 ’ is assembled on the connection ring 2’ by riveting and / or crimping.
• the 2 ’connecting ring is intended to connect the 1’ dial plate to the 30 ’movement, in particular to a 3’ blank of the 30 ’movement.
• the connecting ring constitutes a connecting support or a connecting interface between the movement and the dial plate.
• the 1 ’dial plate for 10’ dial of a 90 ’timepiece is intended to be mounted on the 2’ link ring.
• the dial plate includes:
• the second portion 11 comprises at least a third surface 110’ inclined with respect to the first lower surface 12 ’and / or with respect to the second upper surface 13’ of the dial plate 1 ’.
• the at least one third surface 110 ’ is adapted to cooperate with plastically deformable connecting elements 210’ and provided to abut against the at least one third surface 110 ’.
• the connecting portion 21 ′ is provided with connecting elements 210 ′ provided to come to bear against third surfaces 110 ′ formed on the peripheral contour 11 ′ of the dial plate 1 ′.
• the peripheral contour 11 ' can be defined as being a surface connecting the first surface 12 'intended to be positioned on the interior side of a timepiece and a second opposite upper surface 13' intended to be visible by the wearer of the timepiece.
• the third surfaces 110 ′ may extend in a direction not perpendicular to the first surface 12 ’and are inclined inwardly of the dial plate 1’ from said first surface 12 ’.
• the third surfaces 110 ′ when moving on the third surfaces 110 'while moving away from the first surface 12' and / or by approaching the second surface 13 ', one approaches the axis A' or the center of the first surface 12 'or one approaches the axis A' or the center of the second surface 13 '(this approximation being measured parallel to the first surface 12' or parallel to the second surface 13 ').
• the feet are seven in number and are referenced 210a ', 210b', 210c ', 210d', 210e ', 210f, 210g', as shown in Figure 12.
• the feet are formed on lobes or ears 21a ', 21b', 21c ', 21 d', 21e ', 21 f, 21g' of the connecting portion 21 ', projecting outwardly from the ring 2' in the plane a horizontal or substantially horizontal surface 211 'intended to receive the support of a lateral part, or peripheral part, of the first lower surface 12' of the dial plate 1 'or in a plane parallel to the plane of a horizontal or substantially horizontal surface 211' intended to receive the support of a lateral part, or peripheral part, of the first lower surface 12 'of the plate of dial 1 '.
• these feet each protrude from the surface 211 'towards the outside of the dial in a vertical direction z or in a direction substantially parallel to the direction z.
• these feet each comprise an opening so as to minimize the thickness of material forming the foot and / or so that a tool can be lodged in said opening so that it can plasticize the walls of the foot, and thus do so.
• the feet 210a ', 210b', 210c ', 210d', 210e ', 210f', 210g ' can be pressed against the respective surfaces 110a', 110b ', 110c', 110d ', 110e', 110f , 110g 'of the dial plate 1' as shown in Figure 9.
• the surfaces 110a ', 110b', 110c ', 110d', 110e ', 110f, 110g' are generated by portions of circles or are portions of cones.
• the surfaces 110a ', 110b', 110c ', 110d', 110e ', 110f', 110g ' are in the form of circles or cones. More preferably, these surfaces are inclined and form an angle a 'with their respective axes Ai'.
• FIG. 9 illustrates an angle ⁇ 'defined on the order of 45 °.
• the angle is measured between a generating line of the inclined surface 110a 'and the axis Aa' or between a generating line of the inclined surface 110a 'and the axis A' perpendicular to the first surface 12 'or perpendicular to the first surface 13 '.
• the angle a 'can be between 20 ° and 70 °.
• a 'can be 45 ° or 60 °.
• the dial plate 1 ' is guided with minimal play within the connecting ring 2' by means of the contour 11 'of the plate 1', which is provided to cooperate with a guide surface 24 'of the connecting portion 21 'of the ring 2' as shown in FIG. 10.
• other respective surfaces 15 'and 23' of the plate 1 'and of the ring 2' can perform this guiding function.
• the process comprises the following steps:
• the plastic deformation is preferably carried out by exerting mechanical actions on the connecting elements. These mechanical actions can be performed by a watchmaker using a tool.
• the tool can be a crimp or rivet tool or a rivet.
• the dial plate advantageously has the shape of a disc centered on an axis A, A ’.
• the dial plate can be non-circular.
• the dial plate can be polygonal, square, or rectangular.
• the dial plate may or may not be flat.
• the solution for producing a dial is advantageously envisaged to allow the assembly of a dial plate 1, 1 ′ which may be based on ceramic, in particular a zirconia or an alumina, a fluorescent ceramic and / or phosphorescent, or a composite ceramic based on yttriated zirconia and Dy / Eu doped strontium aluminate.
• the plate can in particular be advantageously made of “luminescent zirconia”, for example as described in patent application EP2730636.
• the plate 1 can be based on a composite material.
• it can be based on a stone, in particular onyx, opal, turquoise or sapphire, or based on mother-of-pearl.
• the Vickers hardness of such a dial plate is greater than 600 HV, or even greater than 700 HV, or even greater than 800 HV.
• the connecting ring 2, 2 ’ is preferably made of metal or a metal alloy. It can be made of brass. Alternatively, it can be made from a gold alloy. Preferably, the Vickers hardness of such a ring is less than 180 HV, or even less than 150 HV, or even less than 100 HV. Alternatively again, the connecting ring 2, 2 ’can be made of steel, in particular Nivaflex®.
• a Vickers hardness ratio between the material chosen for the dial plate and that chosen for the connecting ring is greater than 3, or even greater than 4, or even greater than 5.
• dial 10; 10 has the advantage of not requiring a retaining plate disposed under the entire surface of the dial plate. It is therefore possible to offer different aesthetic variations of a solid dial plate by affixing a layer of varnish visible on and / or under said dial plate.
• the dial for example made of “luminescent zirconia”, could be coated with a layer of varnish comprising a fluorescent and / or phosphorescent property, so as to modulate the day and / or night appearance of said dial.
• the dial plate and the connecting ring are configured and / or arranged so that after plastic deformation of the connecting elements 210; 210 'plastically deformable, the connecting elements 210; 210 'plastically deformable do not extend beyond the second surface 13; 13 'upper.
• the dial plate is not part of the link ring and the link ring is not part of the dial plate.

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

Applications Claiming Priority (2)

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• 2020
  • 2020-09-10 WO PCT/EP2020/075373 patent/WO2021104698A1/fr unknown
  • 2020-09-10 CN CN202080082581.1A patent/CN114730157A/zh active Pending
  • 2020-09-10 EP EP20767582.8A patent/EP4066068A1/de active Pending
  • 2020-09-10 US US17/779,404 patent/US20230013124A1/en active Pending
  • 2020-09-10 JP JP2022530651A patent/JP2023503967A/ja active Pending
  • 2020-11-18 US US16/951,611 patent/US20210157273A1/en active Pending
  • 2020-11-19 JP JP2020192233A patent/JP2021099312A/ja active Pending
  • 2020-11-19 EP EP20208563.5A patent/EP3828643A1/de active Pending
  • 2020-11-26 CN CN202011345235.6A patent/CN112947028A/zh active Pending

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