EP4150410A1 - Boite de montre comprenant un élément tournant - Google Patents
Boite de montre comprenant un élément tournantInfo
- Publication number
- EP4150410A1 EP4150410A1 EP21725749.2A EP21725749A EP4150410A1 EP 4150410 A1 EP4150410 A1 EP 4150410A1 EP 21725749 A EP21725749 A EP 21725749A EP 4150410 A1 EP4150410 A1 EP 4150410A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- watch case
- faces
- rings
- transverse
- rotating element
- 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.)
- Pending
Links
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
- G04B19/28—Adjustable guide marks or pointers for indicating determined points of time
- G04B19/283—Adjustable guide marks or pointers for indicating determined points of time on rotatable rings, i.e. bezel
-
- 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
- G04B37/081—Complete encasings for wrist or pocket watches also comprising means for hermetic sealing of the winding stem and crown
- G04B37/082—Complete encasings for wrist or pocket watches also comprising means for hermetic sealing of the winding stem and crown without special hermetic sealing pieces
-
- 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
- G04B37/085—Complete encasings for wrist or pocket watches without means for hermetic sealing of winding stem or crown without special hermetic sealing pieces
Definitions
- the present invention relates to a watch case comprising at least one middle part, a concentric rotating element mounted on the middle part, being in communication with the inside of the watch case and arranged to be able to be moved in rotation in a transverse plane of the case. watch case, and a sealing device arranged to seal the watch case at least between the middle part, the rotating element and the inside of the watch case.
- the present invention also relates to a timepiece comprising such a watch case.
- a watch case is traditionally used to protect the movement of a watch against dust, humidity, and shock. It comprises a caseband, closed on the bridge side by a caseback, and on the dial side by a bezel bearing the crystal.
- the rotating element provided on the watch case can be actuated by a user, on demand, in the normal operating mode of the watch, in order to perform a function of the watch. Due to its rotation, the surfaces of the rotating element in contact with the middle part are not in permanent contact in normal operating mode.
- Such a rotating element may for example be a selector, a rotating bezel or a lock.
- the rotating element being mounted on the caseband, can create a communication between the outside and the inside of the case either because of the configuration of the watch case, or because the rotating element is arranged to cooperate. , on each actuation, with at least one member or mechanism contained in said watch case.
- Such a rotating element may for example be a lock as described in patent CH 74 655.
- the lock cooperates with an arm arranged in the watch case, said arm being provided with a feeler to read the hours or minutes on a cam, so that the latch rotates through a certain angle to uncover a certain number of teeth provided on the latch in order to allow a blind user to "read" the hours or minutes by counting the number of teeth discovered.
- the lock comprises a rod which passes through the box through a slot, with sufficient play to slide effortlessly. The rod is extended by an internal expansion which cooperates with the arm.
- this document does not mention and does not propose any solution to solve the problem of sealing the box which appears very clearly due to the slot provided on the box to receive the lock rod and the play that must be provided.
- Such a rotating element can also be a lock positioned at 8 o'clock for example on the caseband and secured to a ring arranged to move in rotation with respect to the center of the watch case, for example at an angle of 45 °, at each actuation of the lock between a neutral initial position and a maximum position, by sliding in particular on the caseband.
- the ring is arranged to cooperate with a member or a mechanism provided in the box. This type of lock can be used, for example, to raise and activate a ringtone.
- Such a rotating element can also be a rotating bezel, which carries the crystal, notched and provided with a mark as well as a division into minutes perfectly coinciding with that of the dial, used for example on diving watches.
- a rotating bezel because of its construction, when mounted on the caseband, is in communication with the interior of the case.
- the rotating element could also be a case back or a fixed bezel, bearing the crystal, of a watch case.
- This rotating element once moved in rotation for its mounting on the caseband, remains fixed during normal operation of the watch.
- a back is known for example from patent CH 340451 which describes a steel back screwed onto the soft metal middle part.
- the contact surfaces of the caseband and the back are ground so that the seal is ensured by the direct contact of these two surfaces.
- this construction makes it necessary to limit the choice of materials for the back and middle part to ensure tightness while allowing slippage, especially at the start of unscrewing, allowing the back to be easily unscrewed.
- the soft metal surface of the caseband is generally forced by deforming during screwing to conform perfectly to the caseback and ensure a seal.
- the soft metal surface of the caseband can therefore deteriorate after several disassembly and reassembly, which will cause a loss of waterproofness.
- the present invention aims to remedy these drawbacks by proposing several variations of watch case having a rotating element and for which the tightness can be ensured in the long term, in order to guarantee its reliability.
- the present invention relates to a watch case comprising at least one middle part, a concentric rotating element mounted on the middle part being in communication with the inside of the case and arranged to be able to be moved in rotation in a transverse plane of the watch case when it is actuated by a user, on demand, in normal operation of the watch, and a sealing device arranged to ensure the tightness of the watch case at least between the middle part, the rotating element and the inside of the watch case.
- the sealing device comprises at least a first concentric ring integral with the rotating element and comprising two first transverse faces and two first lateral faces and a second concentric ring integral with the middle part and comprising two second transverse faces and two second lateral faces, said first and second rings being positioned relative to each other so as to have respectively one of the first transverse faces and one of the second transverse faces in contact with each other , or one of the first lateral faces and one of the second lateral faces in contact with one another, said first and second transverse faces, respectively lateral, respectively having a first contact surface and a second contact surface in contact with one another and arranged to form sealing surfaces guaranteeing the sealing between said first and two th ring while allowing sliding of one relative to the other during actuation of the rotating element in normal operation.
- Such a sealing device makes it possible to obtain dynamic sealing, between at least the caseband, the rotating element and the inside of the case, without an elastomer or polymer seal.
- the reliability of the watch case according to the invention is thus obtained.
- At least one of the first and second rings is attached and at least that of the rotating element or the middle part which is integral with the attached ring comprises a peripheral circular housing arranged to receive the first or the middle. second reported ring respectively.
- the rotating element may be the bezel which carries the crystal and which forms the watch case with the middle part.
- the rotating element is a selector or a lock arranged between the middle part and said bezel.
- the first and second surfaces in contact with the first and second rings have a flatness defect less than or equal to 6 ⁇ m, and preferably less than or equal to 5 ⁇ m, and a roughness Ra less than or equal to 0.15 ⁇ m, and of preferably less than or equal to 0.1 pm.
- attached pressure means are provided, such as at least one pressing member, arranged to exert pressure at the level of the contact surfaces of the transverse or lateral faces of the rings, making it possible to guarantee the tightness while by allowing rotation of the rotating element.
- the surfaces in contact with the rings being perfectly fitted and extremely smooth, and held together, form sealing surfaces making it possible to guarantee dynamic sealing between said contacting surfaces without any elastomer or polymer seal, while allowing said surfaces to slide. contact with each other when the rotating element is actuated.
- the invention relates to a watch case comprising at least one middle part, a concentric rotating element mounted on the middle part being in communication with the inside of the watch case and arranged to be able to be moved in rotation in a transverse plane of the watch case, and a sealing device arranged to ensure the sealing of the watch case at least between the middle part, the rotating element and the inside of the watch case, said sealing device comprising at least a first concentric ring integral with the rotating element and comprising two first transverse faces and two first lateral faces and a second concentric ring integral with the middle part and comprising two second transverse faces and two second lateral faces, said first and second rings being positioned relative to each other so as to present respectively one first transverse faces and one of the second transverse faces in contact with one another, or one of the first side faces and one of the second side faces in contact with each other, said first and second transverse faces, respectively lateral, respectively having a first contact surface and a second contact surface in contact with one another and arranged to form sealing surfaces guaranteeing the
- the invention in another variant, relates to a watch case comprising at least one middle part, a concentric rotating element mounted on the middle part being in communication with the inside of the case and arranged to be able to be moved in rotation in a transverse plane. of the watch case, and a sealing device arranged to ensure the sealing of the watch case at least between the middle part, the rotating element and the inside of the watch case, said sealing device comprising at least at least one first concentric ring integral with the rotating element and comprising two first transverse faces and two first lateral faces and a second concentric ring integral with the middle part and comprising two second transverse faces and two second lateral faces, said first and second rings being positioned one relative to the other so as to present respectively one of the first faces transverse and one of the second transverse faces in contact with each other, or one of the first side faces and one of the second side faces in contact with each other, said first and second faces transverse, respectively lateral, respectively having a first contact surface and a second contact surface in contact with one another and arranged to form
- the present invention also relates to a timepiece comprising such a watch case.
- FIG. 1 is a perspective view of a first embodiment of a watch case according to the invention.
- FIG. 2 is a sectional view along the plane 3H-9H of the first embodiment of Figure 1;
- FIG. 3 is a sectional view at the level of the actuating head of an alternative embodiment of the first embodiment
- FIG. 4 is a perspective view of a second embodiment of a watch case according to the invention.
- FIG. 5 is a sectional view at the level of the lock of the second embodiment of Figure 4
- - Figure 6 is a partial sectional view of a third embodiment of a watch case according to the invention.
- FIG. 7 to 10 are sectional views of the rings showing different possible shapes of contact surfaces.
- FIG. 1 there is shown a watch case 1 according to a first embodiment of the invention.
- the watch case 1 conventionally comprises a middle part 2 in which the watch movement is fixed.
- the caseband 2 is closed, on the bridge side, by a back 4, and on the dial side 6, by a bezel 8 carrying the crystal 10.
- the watch case 1 also comprises a rotating element of annular shape, mounted on the middle part 2 concentrically thereto.
- the configuration of the rotating element is such that said rotating element is in communication with the interior of the case.
- the rotating element is arranged to be able to be displaced in rotation in a transverse plane of the watch case 1 relative to the center of said watch case 1, when it is actuated by a user, on demand, in normal operation of the watch, by sliding on at least the middle part 2, in order to perform a function of the watch in connection with the watch movement.
- the rotating element is movable in rotation in a "horizontal" plane parallel to the dial 6 or perpendicular to a central axis of the box 1 around which said box 1 has a general symmetry of revolution, at a certain angle (by example less than 45 °), each time the user is actuated, between a neutral initial position and a maximum position.
- a return spring may be provided to return the rotating element to its initial position after its actuation, depending on the intended application for the rotating element.
- the rotating element is the bezel 8 itself, which carries the crystal 10, arranged to be mounted to be movable in rotation with respect to the middle part 2 by sliding on said middle part 2.
- the rotating bezel 8 is integral with an actuating head 12 perpendicular to said bezel 8 and flush with the outer surface of the middle part 2.
- the outer head 12 is positioned in its initial neutral position, for example at 8 o'clock.
- Such a rotating bezel is used for example to measure a dive time, in connection with the display of the current time on the dial.
- said watch case 1 is provided with a sealing device.
- the sealing device comprises a first ring 14, concentric with the watch case 1 and integral with the rotating element, here the bezel 8, and a second ring 16, concentric, integral with the middle part 2 .
- the first ring 14 comprises two first transverse faces, namely a first lower transverse face 14a, and a first upper transverse face 14b, and two first lateral faces, namely a first outer lateral face 40a and a first inner lateral face 40b.
- the second ring 16 comprises two second transverse faces, namely a second upper transverse face 16a, and a second lower transverse face 16b, and two second lateral faces, namely a second outer lateral face 42a and a second inner lateral face 42b.
- transverse faces of the rings, the annular faces of the rings, upper and lower which are located in a transverse plane of the case, that is to say in the "horizontal" plane parallel to the dial 6 or perpendicular to the case.
- central axis of the box 1 and the term “side faces” of the rings means the inner and outer circular peripheral walls of the rings, which extend parallel to the central axis of the box 1.
- said first and second rings 14, 16 are superimposed, along the central axis of the box 1, so as to present respectively one of the first transverse face, here the first lower transverse face 14a, and one of the second transverse faces, here the second upper transverse face 16a in contact with each other, said first and second transverse faces 14a , 16a respectively having a first contact surface and a second contact surface, in contact with one another, arranged to form sealing surfaces ensuring the sealing between said first and second transverse faces 14a, 16a, while by allowing a sliding of one relative to the other when the rotating element, here the bezel 8, is moved in rotation, during an actuation of the bezel 8, in normal operation, for example during a diving.
- the first and second rings 14, 16 are positioned relative to each other concentrically with respect to the central axis of the box 1, so as to present respectively one of the first side faces, here the first inner side face 40b, and one of the second side faces, here the second outer side face 42a in contact with each other, said first and second side faces 40b , 42a having respectively a first contact surface and a second contact surface, in contact with one another, arranged to form sealing surfaces ensuring the sealing between said first and second side faces 40b, 42a, while by allowing a sliding of one relative to the other when the rotating element, here the bezel 8, is moved in rotation, when the bezel 8 is actuated, in normal operation.
- At least one of the first and second rings 14, 16 is attached and at least that of the rotating element 8 or of the middle part 2 which is integral with the attached ring comprises a peripheral circular housing arranged for receiving said first attached ring 14 or the second attached ring 16. It is possible that only one of the rings is attached, or that both rings are attached.
- the rotating bezel 8 comprises an inner peripheral circular housing 18 arranged to receive the first ring 14, which is therefore attached.
- the first ring 14 is made integral with the rotating bezel 8 by fixing its outer peripheral wall 40a to the housing 18 in the bezel 8 by any known means, such as gluing or assembly by driving in a gasket I 20.
- the middle part 2 comprises an inner peripheral circular housing 22 arranged to receive the second ring 16, which is also attached.
- the second ring 16 is made integral with the middle part 2 by fixing its outer peripheral wall 42a to the housing 22 in the middle part 2 by any known means, such as gluing or assembly by driving in a gasket i 24.
- the gaskets i 20, 24 have the advantage of allowing the rings 14, 16 of the bezel 8 and the caseband 2 to be removed, respectively, if necessary.
- first and second contact surfaces of the first and second transverse faces 14a, 16a or of the first and second side faces 40b, 42a are of complementary shapes allowing the rotation of the rotating element 8.
- the contact surfaces may for example be both plane in the transverse plane of the box, as shown in FIG. 2 or 3, or, viewed in section along a plane perpendicular to the transverse plane of the box, form at least two contiguous inclined planes as in figure 7, or a single inclined plane as in figure 8, or crenellated U-shaped shapes as in figures 9 and 10, or any other suitable shape allowing a displacement of one with respect to the other.
- the first and second contact surfaces of the first and second transverse faces 14a, 16a or of the first and second lateral faces 40b, 42a of the first and second rings 14, 16 have a flatness defect less than or equal to 6 ⁇ m, preferably less than or equal to 5 ⁇ m, and preferably less than or equal to 2 ⁇ m, and more preferably less than or equal to 1 ⁇ m, and a roughness Ra less than or equal to 0.15 ⁇ m, and preferably less than or equal to 0.1 ⁇ m, and more preferably less than or equal to 0.05 ⁇ m.
- first and second contact surfaces of the first and second transverse faces 14a, 16a or of the first and second lateral faces 40b, 42a of the first and second rings 14, 16 have a hardness greater than or equal to 500 HV, and preferably greater than or equal to 1500 HV, and more preferably greater than 1900 HV.
- the rings 14 and 16 are very thin and have, for example, in the first embodiment, a height of less than 1 mm for a width of 2 mm, and an outside diameter of approximately 40 mm.
- the contact surfaces of the first and second transverse faces 14a, 16a or of the first and second lateral faces 40b, 42a of the rings 14, 16 are made of a material chosen from the group comprising ceramics, such as alumina AI2O3. , metallic glass, silicon, silicon oxide, glass, titanium, a metallic alloy, such as brass, CuBe, and hardened steel.
- the entire ring 14, 16 is made of said material.
- the material chosen is alumina AI2O3, worked so as to have a flatness defect less than or equal to 6 ⁇ m, a roughness Ra less than or equal to 0.15 ⁇ m, and a hardness greater than or equal to 1500 HV.
- the invention makes it possible to use rings 14, 16, or at least their contact surfaces, which are made of a material different from the materials of the rotating element and of the middle part, so as to optimize both the 'sealing and sliding, in the event that the materials of the caseband and the rotating element are not suitable for ensuring sealing and sliding at the contact surfaces.
- said ring 14, 16 may be in one piece with the rotating bezel. 8 or the middle 2 respectively, projecting from the inside of the wall of the rotating bezel 8 or the middle 2 respectively, in the direction of the center. At least the part of the part corresponding to the ring 14 or 16 is treated so as to have the appropriate flatness and roughness to ensure sealing and at the same time sliding at the contact surfaces.
- the rings 14 and 16 are shaped to have a certain elasticity or flexibility, optimized as a function of the geometry of the rings, in order to be able to conform to the contact surface of the other ring, and thus improve the sealing.
- said rings can be made of a steel which has a Young's modulus of 210 GPa.
- the first and second contact surfaces of the first and second transverse faces 14a, 16a or of the first and second side faces 40b, 42a of the first and second rings 14, 16 are coated a lubricating agent.
- This lubricating agent is, for example, a standard watchmaking oil or grease, or one based on silicone.
- attached pressure means are provided arranged to exert a pressure, that is to say a normal force, at the level of the contact surfaces of the first and second transverse faces 14a, 16a or of the first and second lateral faces. 40b, 42a of the rings 14, 16, said pressure being chosen for guarantee the water-resistance of the watch case while allowing rotation of the rotating element 8.
- these pressure means comprise a plurality of attached pressing members 26, elastic, for example distributed over the inner circular periphery of the rings 14, 16 as in the first embodiment.
- the pressing members have a sufficiently thin width so as not to have to take into account the curvature of the ring 14, 16.
- the housings 18, 22 in the rotating bezel 8 and the middle part 2 respectively are sufficiently dimensioned to be able to accommodate there also the pressers 26 in order to hold together the rings 14 and 16 superimposed or concentric.
- the pressing member 26 is in the form of a hook or a U-shaped staple overlapping the two rings 14, 16.
- the pressing member 26 is in the form of a U-shaped clip lying in the direction of the rings 14, 16, and comprising a bottom 26a perpendicular to the plane of the dial and two walls perpendiculars 26b, 26c, parallel to the rings 14, 16, so as to define an internal housing arranged to receive said rings 14, 16 at least in part by their free internal peripheral edges.
- the pressing member can also be a spring washer, of the Belleville washer type.
- the pressing member is made, for example, of a spring steel, metallic glass or a suitable shape memory alloy, allowing it to fit over the rings to hold them by exerting a normal force on them.
- the pressing member 26 is also arranged to allow the rotational movement of the first ring 14 integral with the rotating bezel 8 when the latter is moved, while applying sufficient pressure to ensure sealing. of the watch box.
- the pressing member 26 has an internal housing corresponding substantially to the height of the rings 14 and 16 superimposed, so that its wall 26b rests on the upper transverse face 14b of the ring 14, parallel to the lower transverse face 14a of the ring 14, and that its wall 26c rests on the lower transverse face 16b of the ring 16, parallel to the upper transverse face 16a of the ring 16.
- the pressing member 26 holds the two rings 14 and 16 together by exerting sufficient pressure on them ensuring dynamic sealing, without elastomer or polymer seal, at the contact surfaces of the first and second transverse faces 14a, 16a or first and second side faces 40b, 42a, perfectly nested and extremely smooth in shape, while allowing the first ring 14 to rotate with the rotating bezel 8 when the latter is moved, the contact surface of the lower transverse face 14a or of the inner lateral face 40b of the first ring 14 sliding on the contact surface of the upper transverse face 16a or of the outer lateral face 42a of the second ring 16 integral with the middle part 2, the other upper transverse face 14b or l 'other outer lateral face 40a sliding on the wall, for example 26b, of the pressing member 26.
- the surfaces involved can be treated by any suitable method, for example by microtexturing to ensure self-lubrication.
- the materials and the surface state of the surfaces in contact, the flexibility of the rings are chosen so as to have the best possible compromise between the pressure to be applied to the rings to obtain the seal and the forces to be applied to set the rings in motion. rotating element which must be reduced.
- the force applied axially on the rings to guarantee dynamic and static sealing is of the order of 5 N
- the torque to be applied by a user to actuate the rotating element is of the order of 20 N. mm, for a total operating torque of the mechanism to be actuated of the order of 100 N. mm.
- the pressing member 26 has an interior housing dimensioned to house the superimposed rings 14 and 16 as well as the ball bearing 28, allowing a normal force to be exerted on said rings 14 and 16.
- the ball bearing 28 comprises a lower ring 28a integral with the upper transverse face 14b of the first ring 14 and an upper ring 28b here advantageously integral with the wall 26b of the pressing member 26, and therefore integral with the middle part 2 via the wall 26c of said pressing member which bears on the lower transverse face 16b of the second ring 16 which is itself integral with said middle part 2.
- the housings 18, 22 in the rotating bezel 8 and the middle part 2 respectively are sufficiently dimensioned to be able to house also the pressing members 26 and the ball bearing 28 in order to hold the rings 14 and 16 together by pressing them one on the one. 'other.
- the ball bearing 28 is placed in the sealed zone of the watch case 1, making it possible to preserve its integrity.
- the pressing member 26 holds together the two rings 14 and 16 by exerting sufficient pressure on them guaranteeing dynamic sealing, without elastomer or polymer seal, at the contact surfaces of the first and second.
- second side transverse 14a, 16a perfectly nested and extremely smooth, while allowing the first ring 14 to rotate with the rotating bezel 8 when the latter is moved, the contact surface of the lower transverse face 14a of the first ring 14 sliding on the contact surface of the upper transverse face 16a of the second ring 16 integral with the caseband 2 and the upper transverse face 14b of the first ring 14 rolling on the wall 26b of the pressing member 26 via the bearing ball 28.
- the 1 ’watch case includes a 2’ caseband, a 4 ’caseback, and an 8’ bezel bearing the 10 ’crystal.
- the bezel 8 ' is integral with the middle part 2' as will be detailed below, and the rotating element is a selector, a lock or a bolt 30 disposed between the middle part 2 'and the bezel 8 '.
- a lock is defined as a part that allows an organ to be moved from the outside to perform a function.
- the lock 30 comprises a ring 32, mounted between the middle part 2 ’and the bezel 8’ concentrically thereto.
- the ring 32 is arranged to be able to move in rotation in a transverse plane of the watch case 1 'relative to the center of said watch case 1', for example by an angle of less than 45 ° between its initial neutral position and its maximum position, when the lock 30 is actuated by a user, on demand, in normal operation of the watch, with the aim of fulfilling the function which is dedicated to it, by sliding between the middle part 2 'and the bezel 8'.
- a return spring is provided to return the latch 30 to its initial position after it has been actuated by a user.
- the lock 30 also comprises an actuating head 12 'appearing on the outside of the watch case 1'.
- the head 12 ' is integral with the ring 32, perpendicular to said ring 32 and flush with the outer surface of the middle part 2 '.
- the outer head 12 ' is positioned in its initial neutral position, for example at 8 o'clock.
- the sealing device comprises a first ring 14 ', concentric with the watch case 1' and integral with the rotating element, here the lock 30, and a second ring 16 ', concentric, integral with the middle part 2 ', said first and second rings 14', 16 'being superimposed so as to present respectively one of the first transverse faces, here the first lower transverse face 14'a, and one of the second transverse faces, here the second upper transverse face 16'a in contact with one another, said first and second transverse faces 14'a, 16'a respectively having a first contact surface and a second contact surface, in contact with one another on the other, arranged to form sealing surfaces guaranteeing the seal between said first and second transverse faces 14'a, 16'a, of the first and second rings 14 ', 16', while allowing a sliding of the 'in relation to each other when as the rotating element, here the latch 30 is rotated.
- the sealing device also comprises a third ring 34 concentric with the watch case 1 ', and integral with the bezel 8', and comprising two third transverse faces, namely a third lower transverse face 34a and a third upper transverse face 34b , and two third side faces, namely a third outer side face 44a and a third inner side face 44b.
- the third ring 34 is positioned, and more particularly superimposed on the first ring 14 'integral with the rotating element, here the latch 30, so that the first ring 14' and the third ring 34 have respectively the other of the first transverse faces, either the first upper transverse face 14'b of the first ring 14 ', and one of the third transverse faces, or the third lower face 34a in contact with one on the other, said first upper transverse faces 14'b and said third lower transverse face 34a respectively having a third contact surface and a fourth contact surface, in contact with each other, arranged to form surfaces d 'seal guaranteeing the seal between said first and third transverse faces 14'b, 34a of the first and third rings 14', 34, while allowing a sliding of one relative to the other, when the rotating element, here the lock 30 is moved in rotation, during actuation of said lock 30.
- the third ring 34 is positioned concentrically with respect to the first ring 14 ', so that the first ring 14' and the third ring 34 respectively have the another of the first side faces of the first ring, here the first outer side face 40'a, and one of the third side faces, here the third inner side face 44b, in contact with each other, said first and third lateral faces 40'a, 44b respectively having a third contact surface and a fourth contact surface, in contact with one another, arranged to form sealing surfaces ensuring the sealing between said first and third faces lateral 40'a, 44b, while allowing a sliding of one relative to the other when the rotating element is displaced in rotation, during actuation by a user, in normal operation.
- At least one of the rotating element 30, of the caseband 2 or of the bezel 8 ' comprises a peripheral circular housing arranged to receive the first 14', second 16 'or associated third ring 34, which is then attached. It is therefore possible that only one of the rings is reported, or that two rings or all three rings are reported.
- the first ring 14 ' is attached, and has been made integral with the lock 30 by fixing from its outer peripheral wall to the inner peripheral edge of the ring 32 of the lock by any known means, such as gluing or assembly by driving in a joint I.
- the first ring 14 comprises, in particular on its inner peripheral wall 40'b, means for cooperating, on each actuation and displacement of the lock, with at least one member or a mechanism provided inside the box. shows 1.
- These means can be a finger, a lever, or a set of teeth, for example.
- the bezel 8 comprises an inner peripheral circular housing 18’ arranged to receive the third ring 34, which is also attached.
- the third ring 34 is made integral with the bezel 8 ’by fixing its outer peripheral wall 44a to the housing 18’ in the bezel 8 by any known means, such as gluing or assembly by driving in a seal 120 ’.
- the caseband 2 ’ comprises an inner peripheral circular housing 22’ arranged to receive the second ring 16 ’, which is also attached.
- the second ring 16 ' is made integral with the middle part 2' by fixing its outer peripheral wall 42'b to the housing 22 'in the middle part 2' by any known means, such as gluing or assembly by driving in a gasket i 24 ' .
- first and second contact surfaces of the first and second transverse faces 14'a, 16'a or of the first and second side faces 40'b, 42'a are of complementary shapes allowing rotation of the lock 30.
- the third and fourth contact surfaces of the first 14'b and third 34a transverse faces or of the first 40'a and third 44b side faces respectively of the first 14 'and third 34 rings are of complementary shapes allowing rotation of the latch 30. .
- the contact surfaces can be for example all plane in the transverse plane of the box, as shown in Figure 5, or sectional views in a plane perpendicular to the transverse plane of the box, form one or more contiguous inclined planes, or crenellated U-shaped shapes, or any other suitable shape allowing movement of one relative to the other.
- the first and second contact surfaces of the first and second transverse faces 14'a, 16'a or of the first and second lateral faces 40'b, 42'a first and second rings 14 ', 16' have a flatness defect less than or equal to 6 ⁇ m, preferably less than or equal to 5 ⁇ m, and preferably less than or equal to 2 ⁇ m, and more preferably less than or equal to 1 ⁇ m , and a roughness Ra less than or equal to 0.15 ⁇ m, and preferably less than or equal to 0.1 ⁇ m and more preferably less than or equal to 0.05 ⁇ m.
- the third and fourth contact surfaces of the first and third transverse faces 14'b, 34a or of the first and third lateral faces 40'a, 44b of the first and third rings 14 ', 34 have a less than or equal flatness defect. at 6 ⁇ m, preferably less than or equal to 5 ⁇ m, and preferably less than or equal to 2 ⁇ m, and more preferably less than or equal to 1 ⁇ m, and a roughness Ra less than or equal to 0.15 ⁇ m, and preferably less than or equal at 0.1 pm, and more preferably less than or equal to 0.05 pm.
- first and second contact surfaces of the first and second transverse faces 14'a, 16'a or of the first and second lateral faces 40'b, 42'a of the first and second rings 14 ', 16 'as well as the third and fourth contact surfaces of the first and third transverse faces 14'b, 34a or of the first and third lateral faces 40'a, 44b of the first and third rings 14', 34 have a hardness greater than or equal to 500 HV, and preferably greater than or equal to 1500 HV, and more preferably greater than 1900 HV.
- the rings 14 ', 16' and 34 are very thin and have for example, in the embodiment of FIG. 5, a height less than 1 mm for a width of 2 mm, and an outside diameter of approximately 40 mm.
- the contact surfaces of the transverse faces 14a ', 14'b, 16'a, 34a or lateral 40'b, 42'a, 40'a, 44b of the rings 14', 16 ', 34 are made in a material selected from the group consisting of ceramics, such as alumina AI2O3, metallic glass, silicon, silicon oxide, glass, titanium, metallic alloy, such as brass, CuBe, and steel soaked.
- ceramics such as alumina AI2O3, metallic glass, silicon, silicon oxide, glass, titanium, metallic alloy, such as brass, CuBe, and steel soaked.
- the entire ring 14 ’, 16’, 34 is made of said material.
- the material chosen is alumina AI2O3, worked so as to have a flatness defect less than or equal to 6 ⁇ m, a roughness Ra less than or equal to 0.15 ⁇ m, and a hardness greater than or equal to 1500 HV.
- the invention makes it possible to use rings 14 ', 16', and 34 or at least their contact surfaces, which are made of a material different from the materials of the rotating element, of the middle part and of the bezel, so as to optimize both the tightness and the sliding, in the event that the materials of the middle part, of the rotating element and of the bezel are not suitable for guaranteeing sealing and sliding at the level of the contact surfaces.
- said ring 34, 16' can be in one piece with the bezel 8 'or the middle 2' respectively, projecting from the inside of the wall of the bezel 8 'or the middle 2' respectively, in the direction of the center.
- At least the part of the part corresponding to the ring 34 or 16 ’ is treated so as to have the appropriate flatness and roughness to ensure the seal and at the same time the sliding at the contact surfaces with the latch 30.
- the rings 14 ', 16' and 34 are shaped to present a certain elasticity or flexibility, optimized according to the geometry of the rings, to be able to conform to the contact surface of the other ring in contact, and thus improve the seal.
- said rings can be made of a steel which has a Young's modulus of 210 GPa.
- the contact surfaces of the transverse faces 14'a, 14'b, 16'a, 34a or of the lateral faces 40'b, 42'a , 40'a, 44b of the first, second and third rings 14 ', 16', 34 are coated with a lubricating agent.
- This lubricating agent is, for example, an oil or a standard horological grease, or one based on silicone.
- pressing members 26 ' resilient, similar to the pressing members 26 of the first variant described below with reference to Figure 2, arranged to exert pressure at the contact surfaces of the transverse faces 14a', 14 'b, 16'a, 34a or side 40'b, 42'a, 40'a, 44b of the rings 14', 16 ', 34, said pressure being chosen to ensure the tightness of the watch case while allowing a rotation of the rotating element 30.
- the housings 18 ', 22' in the bezel 8 'and the caseband 2' respectively are sufficiently dimensioned to be able to also accommodate the pressing members 26 'therein in order to hold together the rings 16', 14 'and 34 superimposed or concentric by exerting on they a normal force.
- the pressing member 26 ′ in the form of a clip as described above for the pressing member 26, comprises a bottom 26 ′ a perpendicular to the plane of the dial and two walls. perpendicular 26'b, 26'c, parallel to the rings 16 ', 14', 34, so as to define an internal housing arranged to receive at least part of said superimposed rings 16 ', 14 ', 34 by their free inner peripheral edges.
- the pressing member may also be a spring washer, of the Belleville washer type.
- the pressing member 26 ' has an internal housing corresponding substantially to the height of the superimposed rings 16', 14 'and 34, so that its wall 26'b rests on the upper transverse face 34b of the third ring 34, parallel to the lower transverse face 34a of the third ring 34, and to the upper transverse face 14'b of the first ring 14 ', and that its wall 26'c rests on the lower transverse face 16'b of the second ring 16', parallel to the upper transverse face 16'a of the second ring 16 ', and to the lower transverse face 14'a of the first ring 14'.
- the wall 26'b of the pressing member 26 'resting on the third ring 34 integral with the bezel 8' and the wall 26'c of the pressing member 26 'resting on the second ring 16 'integral with the middle part 2' allow said pressing member 26 'to firmly link the middle part 2' to the bezel 8
- the pressing member 26 holds together the three superimposed rings 16', 14 'and 34 by exerting sufficient pressure on them guaranteeing dynamic sealing, without elastomer or polymer seal, at the contact surfaces of the transverse faces 16 'a, 14'a, and 14'b, 34a, or side faces 40'b, 42'a, 40'a, 44b, perfectly nested and extremely smooth in shape, while allowing the first ring 14' to rotate with the latch 30 when the latter is moved, the contact surface of the lower transverse face 14'a or of the internal lateral face 40'b of the first ring 14 'sliding on the contact surface of the upper transverse face 16'a or of the outer lateral face 42'a of the second ring 16 'integral with the middle part 2' and the contact surface of its upper transverse face 14'b or of the inner lateral face 40'a sliding on the surface contact of the lower transverse face 34a or of the outer lateral face 44b of the third ring 34 integral with the bezel 8 '.
- the present invention provides a sealing device for a watch case with a rotating element, which makes it possible to obtain direct dynamic sealing, between at least the middle part, the rotating element and the inside of the case, without a seal. elastomer or polymer, the seal being maintained even when the rotating element is actuated in normal operating mode, so that the watch case according to the invention is particularly reliable.
- a seal of at least 10 m, preferably greater than 20 m and more preferably greater than 30 m can thus be obtained.
- rotating elements described above relate to the bezel or a lock arranged between the middle part and the bezel. It is obvious that the rotating element could also be provided for example between the back and the caseband, between two parts of the caseband if the latter is in several parts, or be a movable part of the caseband if the latter is in several parts or the background itself.
- the invention relates to a watch case 1, 1 'comprising at least one caseband 2, 2', a rotating element 8, 30 concentric mounted on the caseband 2, 2 'while being in communication with the case. 'inside the watch case and arranged to be able to be moved in rotation in a transverse plane of the watch case 1, 1', and a sealing device arranged to seal the watch case 1, 1 ' at least between the caseband 2, 2 ', the rotating element 8, 30 and the inside of the watch case, said sealing device comprising at least a first concentric ring 14, 14' integral with the rotating element 8 , 30 and comprising two first transverse faces 14a, 14b; 14'a, 14'b and two first side faces 40a, 40b, 40'a, 40'b, and a second concentric ring 16, 16 'integral with the middle part 2, 2' and comprising two second transverse faces 16a, 16b ; 16'a, 16'b and two second side faces 42a, 42b, 42'a
- the watch case comprises at least one attached pressing member 26, 26 'arranged to exert pressure at the level of the contact surfaces of the transverse faces 14a, 14a', 14'b, 16a, 16'a, 34a or lateral faces. 40b, 42a, 40'b, 42'a, 40'a, 44b of the rings 14, 14 ', 16, 16', 34, said pressure being chosen to guarantee the tightness of the watch case while allowing rotation of the rotating element 8, 30.
- the present invention proposes a sealing device for a watch case with a rotating element, which makes it possible to obtain dynamic sealing (no loss of sealing when the rotating element is actuated in normal operating mode, as described above) or static, between at least the middle part, the rotating element and the inside of the case, without elastomer or polymer seal, very reliable, the pressure to guarantee the water resistance of the watch case being optimized by means of attached pressing members while allowing rotation of the rotating element to actuate the rotating element in the case of dynamic sealing or for example to unscrew the bottom in the case of static sealing.
- the invention relates to a watch case 1, 1 'comprising at least one caseband 2, 2', a rotating element 8, 30 concentric mounted on the caseband 2, 2 'while being in communication with the interior. of the box and arranged to be able to be displaced in rotation in a transverse plane of the watch case 1, 1 ', and a sealing device arranged to ensure the tightness of the watch case 1, 1' at least between the middle part 2, 2 ', the rotating element 8, 30 and the interior of the watch case, said sealing device comprising at least a first concentric ring 14, 14' integral with the rotating element 8, 30 and comprising two first transverse faces 14a, 14b; 14'a, 14'b and two first side faces 40a, 40b, 40'a, 40'b and a second concentric ring 16, 16 'integral with the middle part 2, 2' and comprising two second transverse faces 16a, 16b; 16'a, 16'b and two second side faces 42a, 42b, 42'a, 42'b,
- the present invention provides a sealing device for a watch case with a rotating element, which makes it possible to obtain dynamic or static sealing between at least the middle part, the rotating element and the inside of the case.
- the attached ring (s) making it possible to choose materials favoring their sliding with respect to one another, independently of the material of the caseband and / or of the rotating element, facilitating the unscrewing of a caseback, for example in the case of a static seal, or guaranteeing sealed sliding while the rotating element is actuated in normal operating mode, in the case of dynamic sealing, as described above.
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Electric Clocks (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| EP20174416 | 2020-05-13 | ||
| PCT/EP2021/062625 WO2021228938A1 (fr) | 2020-05-13 | 2021-05-12 | Boite de montre comprenant un élément tournant |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP4150410A1 true EP4150410A1 (fr) | 2023-03-22 |
Family
ID=70682781
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP21725749.2A Pending EP4150410A1 (fr) | 2020-05-13 | 2021-05-12 | Boite de montre comprenant un élément tournant |
Country Status (2)
| Country | Link |
|---|---|
| EP (1) | EP4150410A1 (fr) |
| WO (1) | WO2021228938A1 (fr) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CH74655A (fr) | 1916-07-28 | 1917-09-01 | Ch Guinand | Montre pour aveugles |
| CH340451A (fr) | 1957-08-14 | 1959-08-15 | Piquerez Sa Ervin | Boîte étanche pour montre |
| DE1964685U (de) * | 1967-04-15 | 1967-07-20 | Karl Rexer Uhrgehaeusefabrik | Armbanduhr-skalenring. |
| DE1964685C3 (de) | 1969-12-23 | 1979-02-22 | Inst Fiz An Latvssr | Verfahren und Vorrichtung zur Orientierung von verschiedenartig ausgebildeten Körpern |
| CH691633A5 (fr) * | 1997-04-04 | 2001-08-31 | Kelek S A | Montre à glissoire étanche. |
| EP3141969A1 (fr) | 2015-09-10 | 2017-03-15 | Omega SA | Élément d'habillage à circuit de communication intégré |
-
2021
- 2021-05-12 EP EP21725749.2A patent/EP4150410A1/fr active Pending
- 2021-05-12 WO PCT/EP2021/062625 patent/WO2021228938A1/fr not_active Ceased
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021228938A1 (fr) | 2021-11-18 |
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