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
  • G04B37/00—Cases
  • G04B37/08—Hermetic sealing of openings, joints, passages or slits
  • G04B37/084—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown
• • 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
  • G04B37/00—Cases
  • G04B37/0008—Cases for pocket watches and wrist watches
  • G04B37/0033—Cases for pocket watches and wrist watches with cover or bottom which can slide or turn (without a spring action)
• • 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
  • G04B37/00—Cases
  • G04B37/0008—Cases for pocket watches and wrist watches
  • G04B37/0041—Cases for pocket watches and wrist watches the cover or the bottom can slide or turn with a spring action

Definitions

• the invention relates to a closure / opening system for a box of a timepiece and such a timepiece box provided with this system.
• the invention also relates to a timepiece comprising such a box.
• timepieces include a box provided with a closing / opening system contributing to participate in the assembly / disassembly of a bottom on a caseband of this box.
• a closing / opening system contributing to participate in the assembly / disassembly of a bottom on a caseband of this box.
• Such a system conventionally comprises a bayonet connection device and a seal generally arranged in a housing defined in this case.
• the seal when mounting the bottom on the middle part, the seal is gradually compressed by this bottom during the movement of the latter relative to the middle part to achieve a tight closure of this box and creating a tightening torque.
• the object of the present invention is to overcome all or part of the disadvantages mentioned above by proposing a timepiece comprising a box provided with a closing / opening system which makes it possible to secure the assembly / disassembly of parts such as a background and a build of this box.
• the invention relates to a closing / opening system for a box of a timepiece, in particular defined in first and second parts of said box, the system comprising a device for producing a mechanical connection in particular a bayonet connection between these first and second parts and a device for creating a friction torque between these first and second parts, the device for creating a friction torque comprising clamping faces configured to cooperate with each other during closure / opening of the box and which are defined in said first and second parts, the system comprising a clamping element comprised in one of these two clamping faces, said clamping element being configured to generate a friction torque constant during a stroke of movement of one of the two pieces relative to the other during the closing / opening of the box of the pi clockwork.
• the system comprises an elastically compressible element included in the same clamping face as the clamping element, said resiliently compressible element being provided to be compressed between these first and second parts; the elastically compressible element and the clamping element protrude from the clamping face in particular from a housing defined in this clamping face in which they are both included; the resiliently compressible member and the clamping member each have a substantially circular shape; the elastically compressible member has a diameter which is greater than the diameter of the clamping member; the elastically compressible member has a thickness that is less than a thickness of the clamping member, said thicknesses being greater than a depth of the housing; the elastically compressible member and the clamping member are arranged in said clamping face concentrically or coaxially; the device for producing a mechanical connection comprises connection faces defined in the first and second parts contributing to ensuring the mechanical connection between these parts; the connecting faces comprise respectively at least one groove and at least one tongue adapted to cooperate with each other during the closing / opening of the box; the connecting face comprising said groove
• the groove comprises a guide zone provided for directing the tongue so as to cause the application of a constant force of stress on the clamping element resulting from the cooperation of the clamping faces between them during the closing / opening of the box ;
• clamping face and the connecting face of the same first or second part are perpendicular or substantially perpendicular to each other;
• the clamping element is a ring made in particular of polymer and the elastically compressible element is a seal including an O-ring; the first piece is a middle and the second piece is a bottom of the box.
• the invention also relates to a box of a timepiece comprising such a closure / opening system.
• the invention also relates to a timepiece comprising such a watch case.
• the closing / opening system of the box comprising such a clamping element contributes to achieving a constant secure tightening / loosening torque between these two parts of the box, for example a bottom and a middle part of this box. and this on a whole race of assembly / disassembly of one of these two parts compared to the other.
• FIG. 1 is a schematic representation of a sectional view of a part of a box of a timepiece including a closure / opening system is in an open configuration, according to an embodiment of the invention
• FIG. 2 is a schematic representation of a sectional view of the part of the timepiece box whose closing / opening system is in a closed configuration, according to the embodiment of the invention.
• FIG. 3 is a schematic representation of the timepiece, according to the embodiment of the invention.
• the invention relates to a timepiece 100 such as a watch comprising a box 2 provided with a closing / opening system 1 defined in a first piece and a second piece 3a, 3b of said box 2, one of which is preferably removable 2. More specifically, this closure / opening system 1 is able to be parameterized in an open or closed configuration for opening or closing the box 2 by assembly / disassembly of these first and second parts 3a, 3b.
• This system 1 comprises a device for producing a mechanical connection 4 including a bayonet connection between these first and second parts 3a, 3b and a device creating a friction torque 5 between the latter 3a, 3b.
• the devices for producing a mechanical connection 4 and for creating a friction torque 5 are two distinct devices of the system 1. These devices 4, 5 are configured to perform different functions when closing / opening the box 2 of watch. Moreover, it will be noted that these two devices 4, 5 consist of different / different elements / parts of the timepiece 100.
• the box 2 has a nonlimiting and non-exhaustive manner a circular shape and comprises a middle part or a middle part-bezel which is closed at an upper face by an ice and at a bottom side by a removable bottom.
• the ice is here arranged above a dial for a particular display of the hour by means of needles driven by a clockwork movement.
• the dial may also include a window for digital or alphanumeric display.
• the timepiece 100 can be placed around the wrist by means of two bracelet strands attached to the box 2 and joined by a clasp of known type.
• the first and second parts 3a, 3b respectively correspond to the middle and the removable bottom, respectively, which can be assembled to one another removably and / or reversibly as specified. previously from a bayonet link.
• These first and second parts 3a, 3b are designed to be displaced in rotation about an axis of rotation A in the context of their assembly or disassembly and this, on a displacement stroke describing an acute angle of preference which may be for example between 15 and 45 degrees, and which is preferably 40 degrees.
• this displacement travel can also be called the angular displacement stroke or the angular stroke of tightening / loosening or the angular stroke of assembly / disassembly of these two parts 3a, 3b.
• this axis of rotation A passes through these two parts 3a, 3b in their center being perpendicular thereto.
• This case 3a thus assembled to the bottom 3b defines an enclosure of the box 2 in which is mounted in particular the movement.
• the device for creating a friction torque 5 comprises clamping faces 6a, 6b which are defined in the first and second parts 3a, 3b and one of these clamping faces 6a, 6b is provided with a clamping element 8 visible in FIGS. 1 and 2.
• These clamping faces 6a, 6b are arranged one opposite the other and are provided to cooperate together so as to create a friction torque between these first and second second parts 3a, 3b in order to thereby configure the friction torque necessary for the secure assembly / disassembly of its two parts 3a, 3b between them during closure / opening of the box 2.
• This friction torque also called safe friction torque or still tightened tightening / loosening torque, is a torque that is constant during the entire displacement stroke performed by one of the two parts 3a, 3b relative to the other.
• the clamping element 8 is configured to generate a constant friction torque during a displacement stroke of one of the two parts 3a, 3b relative to the other during the closing / opening of the box 2 of the timepiece.
• this clamping element 8 is designed to generate a constant friction torque between necessarily rigid parts of the timepiece 100 such as the clamping faces 6a, 6b of each of the first and second parts 3a, 3b and , in particular to ensure a secure closure / opening of the box 2 of the timepiece 100.
• one of the two clamping faces 6a, 6b comprises the clamping element 8.
• this clamping face 6a is defined in the first part 3a here the middle part.
• This clamping face 6a of the middle part 3a comprises a housing 10 in which are arranged an elastically compressible element 9 and this clamping element 8.
• This elastically compressible element 9 is a seal including an O-ring such as for example a O-ring seal.
• Such an elastically compressible element 9 is therefore preferably a circular section gasket which is intended to be compressed between the first and second parts 3a, 3b in order to prevent the infiltration of water between these two parts 3a, 3b.
• Such an element 9 thus makes it possible to ensure an interstitial seal of the box 2 and contributes to improving its service life.
• the clamping element 8 may for example comprise a ring made in particular of polymer, especially Asutane, which is a material marketed by Asulab SA, Marin, Switzerland. This ring is then preferably not threaded because such a mechanical connection with one of the two parts 3a, 3b of the timepiece 100 is not compatible with the expected function of this element 8 which is in particular the generation of a couple constant friction between these two parts 3a, 3b.
• This clamping element 8 is for example a single piece but it can also be formed of several parts cooperating together during the closing / opening of the box 2.
• This clamping element 8 comprises contact faces provided to cooperate with the faces of clamping 6a, 6b of each of the first and second parts 3a, 3b.
• Such a clamping element 8 has characteristics / structural properties specifically defined for the realization of a cooperation with rigid parts of the timepiece 100, such as the clamping faces 6a, 6b of each of the first and second parts 3a. , 3b. Indeed such a clamping element 8 is preferably not adapted to cooperate with parts, or flexible or deformable elements of the timepiece 100. The dimensions of the surfaces of these contact faces participate in setting the intensity of the friction torque between these first and second parts 3a, 3b.
• This housing 10 is an open housing such as a groove January 1 provided with an opening defined in this clamping face 6a. It is considered here that the opening is in the same plane as an outer surface of the clamping face 6a of this first part 3a.
• Such a housing 10 extends longitudinally in this clamping face 6a and has a section having the shape of a half-quadrilateral comprising two parallel walls 12a and a bottom 12b, said walls 12a being perpendicular or substantially perpendicular to this background 12b.
• This elastically compressible element 9 and this clamping element 8 are positioned in this housing 10 so as to project from the clamping face 6a of the first part 3a in which this housing 10 is defined, and this having a part of the body of each of these two elements 8, 9 which passes through the opening of this housing 10.
• the elastically compressible element 9 and the clamping element 8 respectively have thicknesses referenced H1 and H2 in FIG. a depth P of the housing 10.
• the thickness H2 of the clamping element 8 is greater than the thickness H1 of the elastically compressible element 9, and this, so that the element of 8 engages alone with a flat surface of the clamping face 6b of the second part 3b during all or part of the displacement stroke of one of the two parts 3a, 3b relative to the other during the assembly / disassembly of these two parts 3a, 3b together.
• the depth P of this housing 10 is here a distance which is defined between the opening and the bottom 12b of the housing 10.
• this elastically compressible element 9 and the clamping element 8 are concentric or coaxial. In this configuration, it is therefore understood that this elastically compressible element 9 and the clamping element 8 each have a shape essentially circular.
• the elastically compressible element 9 preferably has a diameter d1 which is greater than the diameter d2 of the clamping element 8. It will be noted that the elastically compressible element 9 and the clamping element 8 have shapes preferably similar to those of a horizontal cross section of the box 2, which section is perpendicular to the axis A.
• the system 1 comprises a device for producing a mechanical connection 4 including a bayonet connection between the first and second parts 3a, 3b.
• This device for producing a mechanical connection 4 comprises connecting faces 7a, 7b defined in the first and second parts 3a, 3b and helping to ensure the mechanical connection between the latter.
• the connecting face 7a, 7b and the clamping face 6a, 6b are perpendicular or substantially perpendicular to each other.
• These connecting faces 7a, 7b respectively comprise a groove 11a and a tongue 11b able to cooperate with each other during the closing / opening of the box or during assembly / disassembly of the first and second parts 3a, 3b between them.
• the groove 11a is defined in the connecting face 7a of the first part 3a and the tongue 11b in the connecting face 7b of the second part 3b.
• This groove 11a comprises an inlet through which the tongue 11b can be inserted inside the groove 11a and a bottom that can serve as a stop for this tongue 11b during assembly of the first and second parts 3a , 3b between them. It will be noted that the distance separating the inlet and the bottom of this groove 11a defines the travel path of the first and second parts 3a, 3b relative to each other during assembly / disassembly of these two parts 3a, 3b between them.
• the connecting face 7a of the first part 3a may comprise a guiding portion that can open into the clamping face 6a of this part 3a, this portion being intended to drive the tongue 11b towards the entrance of the groove 11 has in particular during assembly of the first and second parts 3a, 3b between them.
• a guide zone defined on an inner wall of the groove 11a in order to direct the tongue 11b so that the clamping face 6b of the second piece 3b exerts a constant axial pressure on the clamping member 8 as the tongue 11b moves into the interior of the groove 11a until it abuts against the bottom of this groove 11a.
• a guide zone may also include retaining notches, in particular to secure the closure / opening of the box 2, in other words to secure the assembly / disassembly of the first and second parts 3a, 3b between them.
• the device for producing a mechanical connection 4 may comprise several tongues 11b, preferably three, and therefore also several grooves 11, more precisely as many grooves 11a as the face link 7b of the second piece 3b comprises tabs 11b.
• the orientation of one of the two parts relative to the other can be defined by a particular geometry of the tongue 11 b or by integration in the groove 11 has a fixed stop.
• the tongue 11b of the connecting face 7b of the second part 3b is inserted in the guide portion defined in the connecting face 7a of the first part 3a to be directed towards the entrance of the groove 11a.
• This insertion is made in a substantially axial direction relative to the axis of rotation A.
• the flat surface of the clamping face 6b of the second part 3b is positioned by being in contact with the clamping element 8. This flat surface then exerts a constant force of stress causing a reducing the thickness H2 of this clamping element 8 by a value Y (visible in FIG.
• the clamping member 8 is then able to participate by cooperating with the flat surface of the clamping face 6b corresponding here that of the second piece 3b, to the achievement of a friction torque between the first piece 3a. , here the middle part, and the second part 3b, the bottom, to configure the rotational torque required for the assembly / disassembly secure these two parts 3a, 3b and this, over all or part of the angular displacement stroke.
• a clamping element 8 makes it possible to increase this torque by 15-20%, for example with respect to the torque used in the closing / opening systems of the state of the art, in particular when this clamping element 8 is made of a material polymer such as Asutane.
• the clamping member 8 exerts a force friction on the surface of the clamping face 6b of the second 3b, aimed at braking the displacement of the second part 3b about the axis
• the intensity of this friction force is constant due to the shape of the guide zone defined on the inner wall of the groove 11a which is not intended to increase the applied force of stress. to the clamping element 8 but to keep it constant.
• the flat surface of the clamping face 6b of the second part 3b compresses the elastically compressible element 9 to prevent water infiltration between these two parts 3a , 3b.

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• Physics & Mathematics (AREA)
• General Physics & Mathematics (AREA)
• Connection Of Plates (AREA)
• Clamps And Clips (AREA)
• Electric Clocks (AREA)

Applications Claiming Priority (2)

Publications (1)

Family

ID=60673716

Family Applications (2)

Family Applications Before (1)

Country Status (6)

Family Cites Families (35)

• 2017
  • 2017-12-15 EP EP17207783.6A patent/EP3499320A1/de not_active Withdrawn
• 2018
  • 2018-11-19 EP EP18804323.6A patent/EP3724726A1/de active Pending
  • 2018-11-19 US US16/767,409 patent/US11803158B2/en active Active
  • 2018-11-19 KR KR1020207016289A patent/KR102412698B1/ko not_active Expired - Fee Related
  • 2018-11-19 WO PCT/EP2018/081802 patent/WO2019115170A1/fr not_active Ceased
  • 2018-11-19 JP JP2020545862A patent/JP7073515B2/ja active Active
  • 2018-11-19 CN CN201880080974.1A patent/CN111512244B/zh active Active

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