EP3769164A1 - Chronograph for a timepiece - Google Patents
Chronograph for a timepieceInfo
- Publication number
- EP3769164A1 EP3769164A1 EP19712150.2A EP19712150A EP3769164A1 EP 3769164 A1 EP3769164 A1 EP 3769164A1 EP 19712150 A EP19712150 A EP 19712150A EP 3769164 A1 EP3769164 A1 EP 3769164A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- clutch
- wheel
- chronograph
- mobile
- seconds
- 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.)
- Granted
Links
- 230000010355 oscillation Effects 0.000 claims abstract description 12
- 238000006073 displacement reaction Methods 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000007246 mechanism Effects 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 230000036461 convulsion Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000004064 dysfunction Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G04—HOROLOGY
- G04F—TIME-INTERVAL MEASURING
- G04F7/00—Apparatus for measuring unknown time intervals by non-electric means
- G04F7/04—Apparatus for measuring unknown time intervals by non-electric means using a mechanical oscillator
- G04F7/08—Watches or clocks with stop devices, e.g. chronograph
- G04F7/0823—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement
- G04F7/0838—Watches or clocks with stop devices, e.g. chronograph with couplings between the chronograph mechanism and the base movement involving a tilting movement
-
- 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
- G04B13/00—Gearwork
-
- 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
- G04B35/00—Adjusting the gear train, e.g. the backlash of the arbors, depth of meshing of the gears
Definitions
- the invention relates to a chronograph for a watch movement.
- the invention also relates to a watch movement and a timepiece including such a chronograph. Finally, it relates to a clutch as such for a watch movement.
- a timepiece chronograph typically includes a clutch to allow its operation and shutdown.
- the operation of a chronograph hand results from a complex gear train including this clutch.
- a first technical problem found in existing solutions is the bucking of such a chronograph hand, because of this complex cog.
- a second technical problem noted in the existing solutions is the departure jump of a chronograph hand, which results from the implementation of the clutch, which is manifested by a sudden displacement of the chronograph hand at the start of the chronograph . This departure jump gives an impression of dysfunction of the chronograph to its user.
- the object of the invention is to provide a chronograph remedying the problems mentioned above and improving the known solutions of the state of the art.
- a first object of the invention is to provide a chronograph which minimizes, or even eliminates, any jerk of a chronograph hand.
- a second object of the invention is to provide a chronograph which minimizes or even eliminates the starting jump of a chronograph hand.
- the invention relates to a chronograph for a watch movement, characterized in that it comprises a chronograph axis capable of carrying a chronograph second hand on which is mounted a chronograph wheel and in that it comprises a mobile second clutch wheel comprising a lower second clutch wheel capable of meshing a seconds wheel driving a second watch movement mobile and a second seconds clutch wheel, this seconds clutch mobile which can occupy two positions by a rotation about an axis of oscillation, corresponding on the one hand to an engaged configuration of the chronograph in which the upper seconds clutch wheel of the seconds clutch mobile meshes the chronograph wheel and on the other hand to a disengaged configuration in which said upper second clutch wheel of the seconds clutch mobile no longer meshes with the chronograph wheel, and characterized in that e at least one of the two upper and lower second clutch wheels of the second clutch mobile is a game-catching wheel.
- the second clutch mover may comprise a second clutch axis, on which are arranged the two upper and lower second clutch wheels, which is pivotable about an axis of oscillation perpendicular to the axis of the clutch.
- second clutch positioned at its lower pivot, to enable it to occupy respectively its two configurations engaged and disengaged.
- the upper second clutch wheel may be a game-catching wheel.
- the two upper and lower second clutch wheels of the seconds clutch mobile can be wheels to catch up games.
- the seconds clutch axis of the second clutch mobile can oscillate between two positions defined by two axes distributed on either side of a vertical axis.
- the upper second clutch wheel can be positioned in the upper half of the height of the seconds clutch axis of the seconds clutch mobile or from the two-thirds inclusive of this height, this height being measured from its oscillation axis and / or the lower second clutch wheel can be positioned in the lower half of the height of the seconds clutch axis of the seconds clutch mobile, or in the included lower third of this height.
- the upper second clutch wheel may include pennant-shaped teeth with a rounded end.
- the lower second clutch wheel may comprise slotted teeth catching play.
- the invention also relates to a watch movement, characterized in that it comprises a chronograph as described above.
- the watch movement may comprise a seconds wheel comprising a driving second wheel which meshes permanently with the lower seconds clutch wheel of the chronograph second clutch wheel.
- the invention also relates to a timepiece, including a wristwatch, characterized in that it comprises a chronograph as described above.
- the invention also relates to a clutch for watch movement, which includes the features explained above.
- Figure 1 is a schematic sectional view along a plane passing through an axis of a second clutch mobile of a chronograph in an engaged position according to one embodiment of the invention.
- Figure 2 is a schematic sectional view of the chronograph in a disengaged position according to the embodiment of the invention.
- Figure 3 shows a view of an upper second clutch wheel of a second clutch mobile according to the embodiment of the invention.
- the vertical direction as the direction of the axis of rotation of a needle a timepiece and a chronograph.
- the horizontal direction is perpendicular to the vertical direction.
- a chronograph according to an embodiment of the invention is partially illustrated in Figures 1 and 2.
- This chronograph comprises a first member comprising a driving seconds wheel 1 secured to the mobile seconds.
- the chronograph comprises a third member which comprises a chronograph wheel 31 intended to drive in rotational movement a chronograph axis 32 carrying a chronograph second hand, not shown.
- the chronograph according to the embodiment further comprises a second intermediate member in the form of an oscillating seconds clutch mobile.
- This seconds clutch mobile comprises a second clutch axis 22, which can be driven by a low amplitude rotation about a substantially horizontal axis positioned at its lower pivot 23, an axis perpendicular to the clutch. second clutch axis 22. Its upper pivot 24 can thus occupy two positions.
- the second clutch axis 22 In a first position corresponding to the engaged configuration of the chronograph shown in FIG. 1, the second clutch axis 22 is inclined at a first side along a first axis Ci relative to a vertical axis C, and in a second axis corresponding to the disengaged configuration of the chronograph shown in FIG. 2, the second clutch axis 22 is inclined by a second opposite side along a second axis C2 with respect to the vertical axis C, its upper pivot 24 is finding discarded. Note, the lower pivot 23 of the second clutch axis 22 remains fixed.
- the seconds clutch shaft 22 of the second clutch mobile carries two seconds clutch wheels and rotates continuously. Indeed, a lower second clutch wheel 21 meshes with Permanently the seconds wheel 1 which performs one revolution per minute around its axis B.
- An upper seconds clutch wheel 25 is intended to cooperate with the chronograph wheel 31: in the engaged configuration of the chronograph, it meshes with the wheel of chronograph 31.
- the oscillating seconds clutch mobile then causes the chronograph wheel 31 to rotate about its axis D.
- the second clutch axis 22 In the disengaged configuration, the second clutch axis 22 is inclined in a direction that moves the wheel away from the wheel. upper seconds clutch 25 of the chronograph wheel 31, so that their respective teeth are no longer in mesh. In this disengaged configuration, the second clutch axis 22 no longer causes the chronograph wheel 31 to rotate and the chronograph second hand is not rotated.
- the seconds clutch mobile thus fulfills the clutch function of the chronograph. It can be controlled during the various functions of the chronograph (start, stop for example) by rotating the clutch rocker seconds 4 around its axis A.
- Figure 3 shows more particularly the upper seconds clutch wheel 25 of the seconds clutch mobile. It is positioned substantially at two thirds of the height of the second clutch axis 22, and more generally in the upper half of the height of the second clutch axis 22 and more precisely from the two-thirds included of this height, this height being measured from its lower axis of rotation.
- this upper seconds clutch wheel 25 is a game-catching wheel. It comprises elastic flag-shaped teeth 26. Each elastic flag 26 is in the form of an elastic blade. extending rearward with respect to the direction of rotation of the wheel. Such a blade has a slight curvature, the center of curvature is positioned on the side of the wheel. Each flag further comprises a rounded end 27.
- This rounded end is similar to a small sphere whose center is not in line with the flag 26, but positioned in front of this extension.
- These elastic flag-shaped teeth 26 with rounded end 27 cooperate with conventional triangular teeth of the chronograph wheel 31.
- This geometry of the teeth of the upper second clutch wheel 25 enables it to achieve a smooth clutch with the wheel chronograph, in addition to the oscillation movement or slight rotation of a few degrees of the second clutch axis 22 which is favorable to a smooth clutch.
- Each end 27 comes to take position between two triangular teeth, its rounded shape allows it not to hit a tip of a tooth of the chronograph wheel but to insert sliding between two points of two teeth, in a continuous movement.
- the elasticity of the flags makes it possible to engage the bottom of the toothing to eliminate any game of meshing and to absorb the concentricity defects of the mobiles.
- Figure 4 shows more particularly the lower second clutch wheel 21 of the seconds clutch mobile. It is positioned substantially at one third of the height of the second clutch axis 22, or in the lower third of this height, and more generally in the lower half of the height of the second clutch axis 22. , this height being measured from its lower axis of rotation. This position close to the axis of rotation induces a low amplitude movement of this lower second clutch wheel 21, which is similar to a weak translation. Due to this slight translational movement during the oscillation of the mobile clutch second, the meshing between the second wheel 1, which is fixed, and the lower seconds clutch wheel 21 is undisturbed and the implementation of the clutch function does not induce or almost no starting jump of the chronograph hand, unlike what would occur with a horizontal clutch of the state of the art.
- this lower second clutch wheel 21 is a clearance wheel. It comprises split teeth 28, formed of two elastic blades distributed on either side of an opening.
- the two second clutch wheels 21, 25 could have other geometries, as long as they implement the catch-up function games.
- the catching of the games can be implemented by elastic arms associated with the serge, the teeth can then take a conventional form.
- the clutch can be made with only one of the two wheels comprising teeth with catch-up profiles, which would already improve the operation of the chronograph, particularly vis-à-vis the jump start .
- the chronograph according to the embodiment is intended for a watch movement and a timepiece.
- the timepiece is for example a watch, in particular a wristwatch.
- the timepiece may include a mechanical watch movement. This watch movement is for example manual winding type or self-winding type.
- the clutch mechanism has been described in the previous embodiment within a watch movement chronograph. Such a mechanism may, however, be implemented to form more generally a clutch between any two mobiles of a watch movement.
- the invention also relates to a clutch for a watch movement, characterized in that it comprises a clutch mobile comprising a lower clutch wheel capable of meshing with a first driving wheel of a first mobile of a watch movement.
- this clutch mobile can occupy two positions by a rotation about an axis of oscillation, corresponding on the one hand to an engaged configuration of the clutch in which the upper clutch wheel the clutch mobile is adapted to mesh a second wheel of a second mobile of a watch movement and secondly to a disengaged configuration in which said upper clutch wheel of the clutch mobile is no longer able to meshing the second wheel of the second mobile of a watch movement, and characterized in that at least one of the two upper and lower clutch wheels of the mobile clutch is a wheel to catch up games.
- This clutch may comprise all or some of the features described above in connection with the seconds clutch mobile for a chronograph.
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Unknown Time Intervals (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00347/18A CH714798B1 (en) | 2018-03-19 | 2018-03-19 | Chronograph mechanism for a timepiece. |
PCT/EP2019/056129 WO2019179824A1 (en) | 2018-03-19 | 2019-03-12 | Chronograph for a timepiece |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3769164A1 true EP3769164A1 (en) | 2021-01-27 |
EP3769164B1 EP3769164B1 (en) | 2023-10-25 |
Family
ID=61971874
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19712150.2A Active EP3769164B1 (en) | 2018-03-19 | 2019-03-12 | Chronograph for a timepiece |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP3769164B1 (en) |
JP (1) | JP7269949B2 (en) |
CN (1) | CN112204476B (en) |
CH (1) | CH714798B1 (en) |
WO (1) | WO2019179824A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP4092491A1 (en) * | 2021-05-19 | 2022-11-23 | Patek Philippe SA Genève | Timepiece movement with clutch |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH288211A (en) * | 1950-12-15 | 1953-01-15 | Le Coultre & Cie | Chronograph watch movement. |
JP2001349966A (en) * | 2001-04-09 | 2001-12-21 | Seiko Epson Corp | Pointer type portable watch |
EP1288743A1 (en) * | 2001-08-30 | 2003-03-05 | Isa Swiss SA | Clutching device for timepiece |
EP1316863A1 (en) * | 2001-11-09 | 2003-06-04 | Manufacture Roger Dubuis S.A. | Shaped watch-movement with chronograph |
EP1445669A1 (en) * | 2003-02-10 | 2004-08-11 | Richemont International S.A. | Constant force escapement mechanism for a timepiece with indirect seconds |
EP1555584A1 (en) * | 2004-01-13 | 2005-07-20 | Rolex S.A. | Toothed wheel for the removal of play, gear, and the use of this gear |
EP2112567B1 (en) * | 2008-04-21 | 2016-07-13 | Rolex Sa | Gear with backlash compensation for a timepiece mechanism |
CH708339B1 (en) * | 2013-07-04 | 2018-01-31 | Mft La Joux-Perret Sa | Timepiece comprising a second dead mechanism and a chronograph mechanism integrated into a basic movement. |
CH709162B1 (en) * | 2014-01-20 | 2017-11-30 | De Bethune Sa | Clutch device for watch movement. |
EP2945029B1 (en) * | 2014-05-15 | 2017-05-31 | Patek Philippe SA Genève | Chronograph locking device (Device for a clock piece) |
EP3032358B1 (en) * | 2014-12-12 | 2020-10-07 | Richemont International S.A. | Chronograph mechanism for a clock movement |
EP3264199A1 (en) * | 2016-07-01 | 2018-01-03 | Montres Breguet S.A. | Timepiece comprising a switching device of a clockwork mechanism |
-
2018
- 2018-03-19 CH CH00347/18A patent/CH714798B1/en unknown
-
2019
- 2019-03-12 EP EP19712150.2A patent/EP3769164B1/en active Active
- 2019-03-12 CN CN201980019902.0A patent/CN112204476B/en active Active
- 2019-03-12 JP JP2020550662A patent/JP7269949B2/en active Active
- 2019-03-12 WO PCT/EP2019/056129 patent/WO2019179824A1/en unknown
Also Published As
Publication number | Publication date |
---|---|
JP2021518538A (en) | 2021-08-02 |
JP7269949B2 (en) | 2023-05-09 |
CH714798B1 (en) | 2022-03-31 |
EP3769164B1 (en) | 2023-10-25 |
CH714798A1 (en) | 2019-09-30 |
CN112204476A (en) | 2021-01-08 |
CN112204476B (en) | 2022-09-27 |
WO2019179824A1 (en) | 2019-09-26 |
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