EP3364254A1 - Shock-absorbing mechanical device, in particular for clockmaking - Google Patents
Shock-absorbing mechanical device, in particular for clockmaking Download PDFInfo
- Publication number
- EP3364254A1 EP3364254A1 EP17156420.6A EP17156420A EP3364254A1 EP 3364254 A1 EP3364254 A1 EP 3364254A1 EP 17156420 A EP17156420 A EP 17156420A EP 3364254 A1 EP3364254 A1 EP 3364254A1
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- EP
- European Patent Office
- Prior art keywords
- movable member
- flip
- stop
- movable
- mechanical device
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- 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.)
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- 230000035939 shock Effects 0.000 claims abstract description 53
- 230000000694 effects Effects 0.000 claims abstract description 15
- 230000003042 antagnostic effect Effects 0.000 claims abstract description 13
- 239000005557 antagonist Substances 0.000 claims 1
- 238000000034 method Methods 0.000 claims 1
- 230000001133 acceleration Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 230000002349 favourable effect Effects 0.000 description 2
- 210000000056 organ Anatomy 0.000 description 2
- 241001080024 Telles Species 0.000 description 1
- 230000001955 cumulated effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 230000000284 resting effect Effects 0.000 description 1
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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
- G04B43/00—Protecting clockworks by shields or other means against external influences, e.g. magnetic fields
- G04B43/002—Component shock protection arrangements
-
- 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
- G04B11/00—Click devices; Stop clicks; Clutches
-
- 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
- G04B3/00—Normal winding of clockworks by hand or mechanically; Winding up several mainsprings or driving weights simultaneously
- G04B3/04—Rigidly-mounted keys, knobs or crowns
- G04B3/048—Operation exclusively by axial movement of a push-button, e.g. for chronographs
Definitions
- the present invention relates to a shockproof mechanical device, in particular for watchmaking.
- the present invention further provides a method of making such a mechanical device.
- the movable member is for example a rocker or a member guided in translation.
- the or each said movable element may be a rocker or a member guided in translation.
- rocker in the present invention a rocker proper or any similar pivoting member such as a lever or a finger.
- support refers to direct or indirect support.
- the first flip-flop B is held in abutment against a fixed or movable stop T by the additional flip-flops B1, B2.
- the additional flip-flops B1, B2 are themselves held in abutment against the first flip-flop B by springs respective S1, S2 (cf. figure 1 ) or by a single spring S connecting the additional flip-flops B1, B2 (cf. figure 2 ).
- a single spring S it can be in one piece with one of the additional latches B1, B2 to act on the other additional latch as shown in FIG. figure 2 .
- the latter could have its own spring which would press against the stop T.
- the flip-flops B, B1, B2 are typically rigid and are rotatable about centers (more exactly around axes) respectively distinct C, C1, C2 which are fixed relative to a support on which is mounted the mechanical device.
- Said support is for example the fixed frame of the watch mechanism or a mobile frame mounted on this fixed frame.
- the first flip-flop B Under the action of an external member (not shown) the first flip-flop B can leave its position where it bears against the stop T and move with it the additional flip-flops B1, B2 by overcoming the force of the spring or springs S, S1, S2 to fulfill a particular function and / or disable the function it filled when it was in abutment against the stop T.
- R b is the distance between the center of mass G and the center of rotation C of the first flip-flop B
- R 1 the distance between the center of mass G1 and the center of rotation C1 of the additional flip-flop B1
- R 2 the distance between the center of mass G2 and the center of rotation C2 of the other additional flip-flop B2.
- L b1 is the distance (lever arm) between the center of rotation C of the first flip-flop B and the action line D1 of the reaction-action forces exerted between the first flip-flop B and the additional flip-flop B1
- L 1 the distance between the center of rotation C1 of the additional rocker B1 and said line of action D1
- L b2 the distance between the center of rotation C of the first flip-flop B and the action line D2 of the action-reaction forces exerted between the first flip-flop B and the additional flip-flop B2
- L 2 the distance between the center of rotation C2 of the additional flip-flop B2 and said right-hand d action D2.
- each flip-flop B, B1, B2 is defined as being the angle oriented between the half-axis (O, x) and the half-line starting from the center of rotation of the rocker and passing through its center of mass.
- ⁇ designates the direction (including the direction) of any linear shock received by the mechanical device and the clock mechanism comprising it.
- the angle ⁇ is an angle oriented between the half-axis (O, x) and the vector at representing the acceleration of the shock.
- the half-axis (O, x) is parallel to the line joining the center of rotation C and the center of mass G of the first flip-flop B, but it could be otherwise.
- the force of the springs S1, S2, S in the present invention is not taken into account. These are considered to serve only to position, in the absence of shock, the first flip-flop B against the stop T and the additional flip-flops B1, B2 against the first flip-flop B.
- the geometry, the mass and the position of the additional flip-flops B1, B2 are therefore chosen so that during any linear shock (whatever its direction ⁇ and its intensity) tending to move the first flip-flop B away from the stop T , one or more moments are exercised by the set of additional flip-flops B1, B2 on the first flip-flop B under the effect of the shock, according to one of the configurations a), b) and c) above, this moment or the sum of these moments maintaining the first flip-flop B against the stop T.
- the 1 M 2 at .
- the 2 M b at . m b . R b . sin ⁇ - ⁇ b and where is the norm of the vector acceleration at shock.
- Example 1 Example 2 R b 0.66 mm 0.4 mm m b 100 mg 80 mg ⁇ b 180 ° 70 ° R 1 0.49 mm 1 mm m 1 390 mg 120 mg ⁇ 1 240 ° 130 ° L 1 0.48 mm 0.48 mm L b1 0.88 mm 0.88 mm R 2 0.27 mm 1 mm m 2 150 mg 30 mg ⁇ 2 120 ° 10 ° L 2 0.79 mm 0.79 mm L b2 0.3 mm 0.3 mm
- the A1 and A2 curves figures 3 and 4 represent, respectively for the numerical examples 1 and 2 above, the total moment M, in Nmm, received by the first flip-flop B under the effect of the shock as a function of the direction ⁇ of said shock and for an acceleration equal to 1 g (9.81 m / s 2 ).
- This total moment M is equal to M 1 + M 2 - M b cumulated with the conditional executions (I5) and (I6) above.
- the total moment M is strictly positive regardless of the direction ⁇ of the shock, which implies that the first latch B always remains in contact with the stop T.
- a safety factor, c that is to say that the total moment M is always greater than a predefined value, for example equal to 0.2 Nmm, illustrated by the circles A3 and A4.
- the stop T can be mobile.
- the figure 5 illustrates an example of application of the mechanical device according to the first embodiment of the invention, wherein the stop T is a drive wheel and the first lever B is a clutch rocker carrying a clutch wheel B ' which meshes with the drive wheel T when the clutch lever B is in its engaged position.
- the additional flip-flops B1, B2 make it possible to maintain the meshing between the wheels B 'and T even in the event of a linear impact. Such meshing is prestressed. It can operate thanks to the flexibility given by the spring S.
- the clutch lever B could be in abutment against a fixed stop positioned so that the wheels B 'and T mesh with each other.
- the stop T is a cam and the rocker B has a feeler or cam follower. The device according to the invention is then dimensioned on the basis of the most unfavorable angular position of the cam.
- the figure 6 shows a mechanical device, in particular for a watch mechanism, according to a second embodiment of the invention.
- a single additional flip-flop B1 is provided and the centers of rotation C, C1 and mass G, G1 of the first flip-flop B and the additional flip-flop B1 are (in plan view from above) aligned all four. on a straight line D.
- This additional flip-flop B1 is subjected to the action of a spring S1 and plates the first flip-flop B against the stop T.
- condition I5 is applicable by giving N the value 1, the moment M i being calculated in the same way as for one or the other of the additional flip-flops B1, B2 of the first embodiment.
- this second embodiment has the advantage of having only one additional flip-flop.
- it requires a precise alignment of the centers of rotation C, C1 and mass G, G1 of the first flip-flop B and of the additional flip-flop B1 so that the additional flip-flop B1 can act on the first flip-flop B in all directions of rotation. shock tending to move the first flip-flop B from the stop T.
- the flip-flops B, B1, B2 are mounted around physical axes of rotation, in a conventional manner. These latches could nevertheless be mounted around virtual axes of rotation, by means of flexible guide systems.
- the figure 7 shows a variant of the second embodiment in which the additional rocker B1 is connected to a fixing portion F by an elastic blade E allowing the rotation of the additional rocker B1 around a virtual axis, represented by the center of rotation C1, located about 1/3 of the length of the E blade.
- the figure 8 shows a mechanical device, in particular for a watch mechanism, according to a third embodiment of the invention.
- the rocker B is held in abutment against the stop T, and is prevented from losing contact with the stop T in the event of a linear shock, not by an additional rocker but by a pusher element P1 guided by translation.
- the pusing element P1 is guided in translation for example by elastic strips E1 which also fulfill a return function tending to apply the pusing element P1 against the rocker B.
- the geometry, the mass and the position of the pusher element P1 are chosen so that during any linear shock at (Whatever its direction ⁇ and intensity) tending to move the flip-flop B from the stop T, the pusher element P1 exerts on the latch B (with respect to the center of rotation C of the latter) a moment antagonistic and superior to the one exerted by the shock directly on the rocker B, thus maintaining the rocker B in abutment against the stop T.
- This can be expressed by the following inequality: The b 1 . m 1 . cos ⁇ 1 - ⁇ > m b . R b .
- ⁇ b and m 1 are the respective masses of the flip-flop B and the pusher element P1
- R b is the distance between the center of mass G and the center of rotation C of the flip-flop B
- ⁇ b is the angular position , as measured previously, of the flip-flop B
- ⁇ is the direction (including the direction), measured as before, of any linear shock received
- L b1 is the distance (lever arm) between the center of rotation C of the rocker B and the line of action of the action-reaction forces exerted between the flip-flop B and the pusing element P1
- ⁇ 1 is the angular position of the pusher element P1, that is to say the angle oriented between the half-axis (O, x) of the mark (O, x, y) and the force of action exerted by the pusher element P1 on the latch B, this action force being parallel to the direction of movement Dp of the push element P1.
- the angle between the displacement direction Dp of the pusing element P1 and the straight line D 'passing through the center of rotation C and the center of mass G of the rocker B must be an angle right so that the push member P1 can act on the rocker B in all directions of shock tending to move the flip-flop B of the stop T.
- the push member P1 can be used several push elements, to like the additional flip-flops B1, B2 of the first embodiment.
- the above equation I4 'combined with the conditional execution I5' is applicable by analogy. It is also possible to use one or more push elements and one or more additional rockers.
- the figure 9 shows a mechanical device, in particular for a watch mechanism, according to a fourth embodiment of the invention.
- flip-flop B is replaced by a member H guided in translation for example by elastic strips E2 which also fulfill a return function tending to apply the member H against the stop T.
- the member H is for example a pusher element of a watch mechanism.
- a flip-flop B1 subjected to the action of a return spring S1 acts on the member H to hold it against the abutment T in the event of a linear impact.
- the geometry, the mass and the position of the rocker B1 are chosen so that during any linear shock at (Whatever its direction ⁇ and its intensity) tending to move the organ H away from the stop T, the rocker B1 exerts on the organ H under the effect of the shock an antagonistic force and greater than that which exerts the shock directly on the member H, thus maintaining the member H bearing against the stop T.
- This can be expressed by the following inequality: R 1 . m 1 . sin ⁇ - ⁇ 1 The 1 > m h .
- ⁇ h and m 1 are the respective masses of the member H and the flip-flop B1
- R 1 is the distance between the center of mass G1 and the center of rotation C1 of the flip-flop B1
- ⁇ 1 is the angular position, measured as before, of the flip-flop B1
- ⁇ is the direction (including the direction), measured as before, of any linear shock received
- L 1 is the distance (lever arm) between the center of rotation C1 of the flip-flop B1 and the action-force of the action-reaction forces exerted between the latch B1 and the member H
- ⁇ h is the angular position of the member H, that is to say the angle oriented between the half-axis (O, x) of the reference (O, x, y) and the force exerted by the member H on the latch B1, this force being parallel to the direction of movement D h of the member H.
- the angle between the direction of movement D h of the member H and the line D1 'passing through the center of rotation C1 and the center of mass G1 of the flip-flop B1 must be a right angle so that the flip-flop B1 can act on the member H in all directions of shock tending to move the member H away from the stop T. avoid having to precisely position the flip-flop B1 can use several flip-flops, like the additional flip-flops B1, B2 of the first embodiment.
- one or more push elements of the type of the element P1 of the third embodiment can be used.
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Abstract
Dispositif mécanique comprenant un organe mobile (B) tel qu'une bascule, une butée (T) fixe ou mobile et un dispositif de maintien (B1, B2, S1, S2) pour maintenir l'organe mobile (B) en appui contre la butée (T). Le dispositif de maintien comprend au moins un élément mobile (B1, B2), tel qu'une bascule, en appui contre l'organe mobile (B). Les géométrie(s), masse(s) et position(s) de l'au moins un élément mobile (B1, B2) sont telles que, lors de tout choc linéaire tendant à éloigner l'organe mobile (B) de la butée (T), l'au moins un élément mobile (B1, B2) exerce sur l'organe mobile (B) sous l'effet du choc une action antagoniste à l'action exercée par le choc sur l'organe mobile (B), cette action antagoniste maintenant l'organe mobile (B) contre la butée (T).Mechanical device comprising a movable member (B) such as a rocker, a stop (T) fixed or movable and a holding device (B1, B2, S1, S2) for holding the movable member (B) in abutment against the stop (T). The holding device comprises at least one movable element (B1, B2), such as a rocker, bearing against the movable member (B). The geometry (s), mass (s) and position (s) of the at least one movable element (B1, B2) are such that, during any linear shock tending to move the movable member (B) away from the stop (T), the at least one movable member (B1, B2) exerts on the movable member (B) under the effect of the shock an action that is antagonistic to the action exerted by the impact on the movable member (B) this antagonistic action now the movable member (B) against the stop (T).
Description
La présente invention concerne un dispositif mécanique antichoc, notamment pour l'horlogerie.The present invention relates to a shockproof mechanical device, in particular for watchmaking.
Dans l'horlogerie on utilise souvent des organes mobiles, en particulier des bascules, en appui contre des butées fixes ou mobiles telles que des cames ou roues.In watchmaking, mobile members are often used, in particular flip-flops, resting against fixed or moving stops such as cams or wheels.
La plupart de ces organes mobiles sont sensibles aux chocs. Pour les bascules, cela est dû à leur balourd. Par conséquent, lorsque la montre reçoit un choc il peut arriver que l'organe mobile perde le contact avec la butée ce qui peut avoir des conséquences négatives sur le fonctionnement ou le réglage de la montre.Most of these moving parts are shock sensitive. For the scales, this is due to their imbalance. Therefore, when the watch receives a shock it may happen that the movable member loses contact with the stop which may have negative consequences on the operation or the setting of the watch.
La présente invention vise à remédier à cet inconvénient et propose à cette fin un dispositif mécanique comprenant :
- un organe mobile ;
- une butée fixe ou mobile ; et
- un dispositif de maintien pour maintenir l'organe mobile en appui contre la butée,
- a movable member;
- a fixed or movable stop; and
- a holding device for holding the movable member in abutment against the stop,
La présente invention propose en outre un procédé de réalisation d'un tel dispositif mécanique.The present invention further provides a method of making such a mechanical device.
L'organe mobile est par exemple une bascule ou un organe guidé en translation. De même, le ou chaque dit élément mobile peut être une bascule ou un élément guidé en translation.The movable member is for example a rocker or a member guided in translation. Similarly, the or each said movable element may be a rocker or a member guided in translation.
Par le terme « bascule » on entend dans la présente invention une bascule proprement dite ou tout organe pivotant similaire tel qu'un levier ou un doigt.By the term "rocker" is meant in the present invention a rocker proper or any similar pivoting member such as a lever or a finger.
Par ailleurs, le terme « appui » s'entend d'un appui direct ou indirect.In addition, the term "support" refers to direct or indirect support.
D'autres caractéristiques et avantages de la présente invention apparaîtront à la lecture de la description détaillée suivante faite en référence aux dessins annexés dans lesquels :
- la
figure 1 est une vue plane de dessus d'un dispositif mécanique selon un premier mode de réalisation de l'invention ; - la
figure 2 est une vue plane de dessus d'une variante du dispositif mécanique selon le premier mode de réalisation de l'invention ; - les
figures 3 et4 sont des diagrammes de valeurs de moments de force obtenus avec deux exemples numériques du dispositif mécanique selon le premier mode de réalisation de l'invention ; - la
figure 5 est une vue plane de dessus d'un dispositif mécanique selon un exemple d'application du premier mode de réalisation de l'invention ; - la
figure 6 est une vue plane de dessus d'un dispositif mécanique selon un deuxième mode de réalisation de l'invention ; - la
figure 7 est une vue plane de dessus d'un dispositif mécanique selon une variante du deuxième mode de réalisation de l'invention ; - la
figure 8 est une vue plane de dessus d'un dispositif mécanique selon un troisième mode de réalisation de l'invention ; et - la
figure 9 est une vue plane de dessus d'un dispositif mécanique selon un quatrième mode de réalisation de l'invention.
- the
figure 1 is a plan view from above of a mechanical device according to a first embodiment of the invention; - the
figure 2 is a plan view from above of a variant of the mechanical device according to the first embodiment of the invention; - the
figures 3 and4 are diagrams of values of moments of force obtained with two numerical examples of the mechanical device according to the first embodiment of the invention; - the
figure 5 is a plan view from above of a mechanical device according to an exemplary application of the first embodiment of the invention; - the
figure 6 is a plan view from above of a mechanical device according to a second embodiment of the invention; - the
figure 7 is a plan view from above of a mechanical device according to a variant of the second embodiment of the invention; - the
figure 8 is a plan view from above of a mechanical device according to a third embodiment of the invention; and - the
figure 9 is a plan view from above of a mechanical device according to a fourth embodiment of the invention.
En référence à la
Les bascules B, B1, B2 sont typiquement rigides et sont rotatives autour de centres (plus exactement autour d'axes) respectifs distincts C, C1, C2 qui sont fixes par rapport à un support sur lequel est monté le dispositif mécanique. Ledit support est par exemple le bâti fixe du mécanisme horloger ou un bâti mobile monté sur ce bâti fixe.The flip-flops B, B1, B2 are typically rigid and are rotatable about centers (more exactly around axes) respectively distinct C, C1, C2 which are fixed relative to a support on which is mounted the mechanical device. Said support is for example the fixed frame of the watch mechanism or a mobile frame mounted on this fixed frame.
Sous l'action d'un organe extérieur (non représenté) la première bascule B peut quitter sa position où elle est en appui contre la butée T et déplacer avec elle les bascules supplémentaires B1, B2 en vainquant la force du ou des ressorts S, S1, S2 pour remplir une fonction particulière et/ou désactiver la fonction qu'elle remplissait lorsqu'elle était en appui contre la butée T.Under the action of an external member (not shown) the first flip-flop B can leave its position where it bears against the stop T and move with it the additional flip-flops B1, B2 by overcoming the force of the spring or springs S, S1, S2 to fulfill a particular function and / or disable the function it filled when it was in abutment against the stop T.
Sur la
Les bascules supplémentaires B1, B2 servent à empêcher la première bascule B de perdre le contact avec la butée T lors d'un choc linéaire. L'effet d'un choc linéaire sur chacune des bascules B, B1, B2 dépend de la position du centre de masse de la bascule et de la direction α du choc. Le choc exerce en effet au centre de masse de la bascule une force qui se traduit en un moment de force par rapport au centre de rotation de la bascule. En fonction de la direction α du choc, deux cas sont possibles pour le dispositif illustré à la
- 1) Le choc produit sur la première bascule B un moment tendant à plaquer la première bascule B contre la butée T. La direction α du choc est donc favorable et il n'y a pas de risque que la première bascule B s'éloigne de la butée T. Dans l'exemple de la
figure 1 , ce cas correspond à un angle α compris entre 0° et 180°. - 2) Le choc produit sur la première bascule B un moment tendant à éloigner la première bascule B de la butée T. La direction α du choc est donc défavorable et ce sont les bascules supplémentaires B1, B2, ou seulement l'une d'entre elles, qui, sous l'effet du choc, maintiennent la première bascule B contre la butée T. Dans l'exemple de la
figure 1 , ce cas correspond à un angle α compris entre 180° et 360°. La configuration où la direction α du choc est neutre pour la première bascule B (c'est-à-dire égale à 180° ou 360° dans l'exemple de lafigure 1 ) est considérée comme comprise dans ce cas. Les bascules supplémentaires B1, B2 peuvent aussi agir, bien entendu, dans le cas 1).
- 1) The shock produced on the first latch B a moment tending to press the first latch B against the stop T. The direction α of the shock is therefore favorable and there is no risk that the first latch B away from the stop T. In the example of the
figure 1 this case corresponds to an angle α between 0 ° and 180 °. - 2) The shock produced on the first flip-flop B a moment tending to move the first flip-flop B from the stop T. The direction of the shock is therefore unfavorable and it is the additional flip-flops B1, B2, or only one of them, which, under the effect of the shock, keep the first rocker B against the stop T. In the example of the
figure 1 this case corresponds to an angle α of between 180 ° and 360 °. The configuration where the direction α of the shock is neutral for the first flip-flop B (that is to say equal to 180 ° or 360 ° in the example of thefigure 1 ) is considered to be included in this case. The additional flip-flops B1, B2 can also act, of course, in the case 1).
Dans un but de simplification il n'est pas tenu compte de la force des ressorts S1, S2, S dans la présente invention. Ceux-ci sont considérés comme servant uniquement à positionner, en l'absence de choc, la première bascule B contre la butée T et les bascules supplémentaires B1, B2 contre la première bascule B.For the purpose of simplification, the force of the springs S1, S2, S in the present invention is not taken into account. These are considered to serve only to position, in the absence of shock, the first flip-flop B against the stop T and the additional flip-flops B1, B2 against the first flip-flop B.
Dans le cas 2) ci-dessus, trois sous-cas sont possibles en fonction de la direction α du choc :
- a) Sous l'effet du choc les deux bascules supplémentaires B1, B2 agissent sur la première bascule B pour maintenir cette dernière contre la butée T. Chaque bascule supplémentaire B1, B2 exerce donc un moment sur la première bascule B et la somme de ces deux moments (par rapport au centre de rotation de la première bascule B) est antagoniste et supérieure au moment qu'exerce directement le choc sur la première bascule B. Cette configuration peut s'exprimer de la manière suivante :
- b) Sous l'effet du choc seule la bascule supplémentaire B1 agit sur la première bascule B pour maintenir cette dernière contre la butée T, l'autre bascule supplémentaire B2 étant entraînée par le choc dans le sens qui l'éloigne de la première bascule B (sens horaire sur la
figure 1 ). La bascule supplémentaire B1 exerce donc sur la première bascule B un moment (par rapport au centre de rotation de la première bascule B) antagoniste et supérieur à celui qu'exerce directement le choc. Cette configuration peut s'exprimer de la manière suivante : - c) Sous l'effet du choc seule la bascule supplémentaire B2 agit sur la première bascule B pour maintenir cette dernière contre la butée T, l'autre bascule supplémentaire B1 étant entraînée par le choc dans le sens qui l'éloigne de la première bascule B (sens horaire sur la
figure 1 ). La bascule supplémentaire B2 exerce donc sur la première bascule B un moment (par rapport au centre de rotation de la première bascule B) antagoniste et supérieur à celui qu'exerce directement le choc. Cette configuration peut s'exprimer de la manière suivante :
- a) Under the effect of the shock the two additional flip-flops B1, B2 act on the first flip-flop B to hold it against the stop T. Each additional flip-flop B1, B2 thus exerts a moment on the first flip-flop B and the sum of these two moments (relative to the center of rotation of the first flip-flop B) is antagonistic and greater than the moment that the shock directly exerts on the first flip-flop B. This configuration can be expressed as follows:
- b) Under the effect of the shock only the additional rocker B1 acts on the first rocker B to maintain it against the stop T, the other additional rocker B2 being driven by the shock in the direction that away from the first rocker B (clockwise on the
figure 1 ). The additional flip-flop B1 thus exerts on the first flip-flop B a moment (with respect to the center of rotation of the first flip-flop B) that is antagonistic and greater than that which the shock exerts directly. This configuration can be expressed as follows: - c) Under the effect of the shock only the additional rocker B2 acts on the first rocker B to maintain the latter against the stop T, the other additional rocker B1 being driven by the shock in the direction that away from the first rocker B (clockwise on the
figure 1 ). The additional flip-flop B2 thus exerts on the first flip-flop B a moment (with respect to the center of rotation of the first flip-flop B) that is antagonistic and greater than that exerted directly by the shock. This configuration can be expressed as follows:
Dans la présente invention on choisit donc la géométrie, la masse et la position des bascules supplémentaires B1, B2 pour que lors de tout choc linéaire (quelles que soient sa direction α et son intensité) tendant à éloigner la première bascule B de la butée T, un ou des moments soient exercés par l'ensemble de bascules supplémentaires B1, B2 sur la première bascule B sous l'effet du choc, selon l'une des configurations a), b) et c) ci-dessus, ce moment ou la somme de ces moments maintenant la première bascule B contre la butée T. Ceci peut être exprimé par l'inéquation suivante :
Il existe une multitude d'agencements permettant d'obtenir l'effet souhaité. Deux exemples numériques sont présentés ci-dessous en relation avec le premier mode de réalisation illustré à la
Les courbes A1 et A2 des
Il va de soi que le nombre de bascules supplémentaires n'est pas limité à deux mais peut être plus grand. L'inéquation I4 peut en effet être généralisée ainsi :
Comme déjà indiqué, la butée T peut être mobile. La
La
Par rapport au premier mode de réalisation, ce deuxième mode de réalisation présente l'avantage de ne comporter qu'une bascule supplémentaire. Par contre, il nécessite un alignement précis des centres de rotation C, C1 et de masse G, G1 de la première bascule B et de la bascule supplémentaire B1 pour que la bascule supplémentaire B1 puisse agir sur la première bascule B dans toutes les directions de choc tendant à éloigner la première bascule B de la butée T.Compared to the first embodiment, this second embodiment has the advantage of having only one additional flip-flop. On the other hand, it requires a precise alignment of the centers of rotation C, C1 and mass G, G1 of the first flip-flop B and of the additional flip-flop B1 so that the additional flip-flop B1 can act on the first flip-flop B in all directions of rotation. shock tending to move the first flip-flop B from the stop T.
Dans les exemples illustrés aux
La
Dans l'exemple de la
La
Dans l'exemple de la
Claims (14)
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00178/17A CH713473A2 (en) | 2017-02-16 | 2017-02-16 | Anti-shock mechanical device, in particular for watchmaking. |
EP17156420.6A EP3364254B1 (en) | 2017-02-16 | 2017-02-16 | Shock-absorbing mechanical device, in particular for clockmaking |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CH00178/17A CH713473A2 (en) | 2017-02-16 | 2017-02-16 | Anti-shock mechanical device, in particular for watchmaking. |
EP17156420.6A EP3364254B1 (en) | 2017-02-16 | 2017-02-16 | Shock-absorbing mechanical device, in particular for clockmaking |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3364254A1 true EP3364254A1 (en) | 2018-08-22 |
EP3364254B1 EP3364254B1 (en) | 2020-04-22 |
Family
ID=65323819
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17156420.6A Active EP3364254B1 (en) | 2017-02-16 | 2017-02-16 | Shock-absorbing mechanical device, in particular for clockmaking |
Country Status (2)
Country | Link |
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EP (1) | EP3364254B1 (en) |
CH (1) | CH713473A2 (en) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1184396B (en) * | 1960-03-31 | 1964-12-31 | Licentia Gmbh | Mechanical locking device for moving parts of electrical switchgear |
US6486758B1 (en) * | 2000-11-21 | 2002-11-26 | Eaton Corporation | Shock-resistant circuit breaker with inertia lock |
EP2945029A1 (en) * | 2014-05-15 | 2015-11-18 | Patek Philippe SA Genève | Chronograph locking device (Device for a clock piece) |
-
2017
- 2017-02-16 EP EP17156420.6A patent/EP3364254B1/en active Active
- 2017-02-16 CH CH00178/17A patent/CH713473A2/en not_active Application Discontinuation
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1184396B (en) * | 1960-03-31 | 1964-12-31 | Licentia Gmbh | Mechanical locking device for moving parts of electrical switchgear |
US6486758B1 (en) * | 2000-11-21 | 2002-11-26 | Eaton Corporation | Shock-resistant circuit breaker with inertia lock |
EP2945029A1 (en) * | 2014-05-15 | 2015-11-18 | Patek Philippe SA Genève | Chronograph locking device (Device for a clock piece) |
Also Published As
Publication number | Publication date |
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CH713473A2 (en) | 2018-08-31 |
EP3364254B1 (en) | 2020-04-22 |
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