• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
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    • 专利摘要:
    Un membre de compression, un palier anti-choc, un mouvement, et une pièce d’horlogerie rendant possible l’obtention d’améliorations en termes de résistance aux chocs sont décrits. Un membre de compression 185 est pourvu sur un palier anti-choc 180 équipé d’un contre-pivot 184 disposé vis-à-vis d’une surface d’extrémité 21e d’un arbre de balancier 22 dans la direction axiale, une pierre trouée 183 dans laquelle est insérée un pivot 21 A, 21B de l’arbre de balancier 22, un chaton 182 retenant le contre-pivot 184 et la pierre trouée 183, et un corps de logement 181 recevant le chaton 182, le membre de compression étant agencé sur la surface extérieure du contre-pivot 184 dans la direction axiale afin de retenir le contre-pivot 184; et le membre de compression est formé d’un matériau viscoélastique. Une partie de fixation du membre de compression 185 est une rainure 181e prévue dans la surface interne d’un cadre de verrouillage 181d du corps de logement 181, et dans laquelle une partie périphérique extérieure 185a du membre de compression 185 est insérée pour sa fixation.
    公开号:CH711595A2
    申请号:CH01199/16
    申请日:2016-09-15
    公开日:2017-03-31
    发明作者:Ito Kengo
    申请人:Seiko Instr Inc；
    IPC主号:
    专利说明:

    Description
    BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a compression member, an anti-shock bearing, a movement, and a timepiece. 2. Description of the Prior Art [0002] Conventionally, a rotary mechanical component such as a gear used in a mechanical timepiece such as a wristwatch is equipped with a bearing in order to contain the The end of a rod or a shaft. In particular, for a shaft of low strength, bearings are used which are known as anti-shock bearings capable of absorbing externally generated shock loads when, for example, the watch is dropped to the ground (see, for example, JP-A-52-38,962 and Japanese Patent No. 4,598,701).
    The anti-shock bearing disclosed in JP-A-52-38962 and Japanese Patent No. 4,598,701 is equipped, for example, with a holed stone in which is inserted the pivot of a shaft Such as a balance shaft, a counter pivot formed so that it can support the end of the pivot of the shaft, and a compression spring (compression member) suppressing the movement of the counter-pivot -pivot outwards in the axial direction. The pierced stone, counter-pivot, and compression spring are all included in a kitten. In the anti-shock bearing disclosed in JP-A-52-38962 and Japanese Patent No. 4598701, the compression spring acts against the counter pivot by holding it axially inward, so that than,
    However, according to the conventional technique, when a shock of very high intensity is generated from the outside, for example when a watch is dropped, and the shaft and the holed stone are strongly displaced in the direction Of the axial direction, the displacement levels and the return force applied by the compression spring are also very large. At this point the shaft and the holed stone are strongly put back in place, but due to the excessive spring force of the compression spring, it is feared that excessive load will be applied to the shaft. In particular, in the case where the shaft is a balance shaft, the balance shaft is displaced in the axial direction and in the radial direction due to the excessive return force of the compression spring, And it is to be feared that the spiral spring of the rocker connected to the balance shaft is deflected and undergoes plastic deformation. Thus, the conventional technique leaves a margin of maneuver in terms of the possibilities of improvement from the point of view of impact resistance.
    SUMMARY OF THE INVENTION
    [0005] The present invention has been designed to address the above problem; It is an object of the present invention to provide a compression member, an anti-shock bearing, a movement, and a timepiece which make it possible to achieve improvements in terms of impact resistance.
    In order to achieve this object, a compression member provided on an anti-shock bearing equipped with a counter-pivot arranged with respect to a surface d The end of the shaft in the axial direction, a holed stone in which the end of the shaft is inserted, a catch holding the counter pivot and the holed stone, and a receiving body receiving Wherein at least a portion of the compression member is arranged on the outside of the counter pivot in the axial direction to retain the counter pivot and the compression member is formed of a viscoelastic material.
    [0007] Selon la présente invention, le membre de compression est formé d’un matériau viscoélastique, de telle sorte que, en comparaison avec la technique conventionnelle selon laquelle le membre de compression est un ressort en métal, il est possible d’obtenir de meilleures performances en termes d’atténuation de vibrations. Par conséquent, dans le membre de compression, même lorsque le contre-pivot est déplacé par un choc ou similaire provenant de l’extérieur, il est possible d’absorber l’énergie de déplacement, et d’empêcher la génération d’une force excessive de rappel afin de supprimer la charge appliquée au contre-pivot et à l’arbre. Ainsi, grâce au palier anti-choc comprenant le membre de compression selon la présente invention, il est possible d’obtenir des améliorations en termes de résistance aux chocs comparé à la technique conventionnelle.
    [0008] Furthermore, according to the present invention, there is provided an anti-shock bearing comprising: a counter pivot arranged against an end surface of the shaft in the axial direction, a stone pierced in A catch holding the counter pivot and the perforated stone, a housing body receiving the kitten, and a compression member, at least a part of which is arranged on the outer face of the counter- Pivot in the axial direction and which retains the counter pivot, the compression member being formed of a viscoelastic material.
    According to the present invention, the compression member is formed of a viscoelastic material so that, compared with the conventional technique, in which the compression member is a metal spring, it is possible to obtain Better performance in terms of vibration attenuation. Consequently, in the compression member, even when the counter-pivot is moved by shock or the like from outside, it is possible to absorb the energy of displacement and to prevent the generation of a force Excessive to return the load applied to the counter-pivot and the shaft. Thus, it is possible to obtain an improvement in terms of impact resistance compared to the conventional technique.
    [0010] Furthermore, according to the present invention, there is provided an anti-shock bearing further comprising a fixing portion which can fix the outer peripheral portion of the compression member to the housing body, the compression member being fixed to the portion , And being arranged in such a way that it covers at least part of the counter pivot.
    According to the present invention, at least part of the counter-pivot is covered by the compression member, whereby it is possible to transmit the load generated by the displacement of the pivot due to a shock or the like, coming from On the outside, to the compression member. Thus, it is possible to obtain an improvement in terms of impact resistance from the anti-shock bearing.
    The fastening part is a groove which is disposed in the internal surface of the housing body and in which the outer peripheral part of the compression member is inserted for fastening.
    [0013] According to the present invention it is possible, merely by inserting the outer peripheral portion of the compression member into the groove, to easily fix the compression member to the housing body without the need to require a fixing member. Thus, it is possible to obtain an anti-shock bearing which makes it possible to obtain improvements in terms of impact resistance and which can be produced at low cost.
    Furthermore, the fastening part is an annular fastener which is engaged by screwing to the housing body and which retains the outer peripheral part of the compression member.
    According to the present invention, after the compression member has been assembled to the housing body, the fastener is engaged as a fastening part by screwing to the housing body, whereby it is possible to fix easily The compression member in position. Consequently, it is possible to obtain an improvement in terms of the assembly and holding properties for the anti-shock bearing.
    Furthermore, the compression member has a circular configuration seen from the axial direction and is arranged in such a way that it covers the entire surface of the counter pivot.
    [0017] Selon la présente invention, il est possible de recouvrir l’intégralité de la surface du contre-pivot à l’aide du membre de compression, de telle sorte qu’il est possible de transmettre de manière fiable la charge générée par le déplacement du contre-pivot dû à un choc ou similaire provenant depuis l’extérieur au membre de compression. Ainsi, il est possible d’obtenir des gains significatifs en termes de résistance aux chocs de la part du palier anti-choc.
    [0018] Par ailleurs, le membre de compression est de configuration polygonale vu de la direction axiale, et une arête du membre de compression -c’est-à-dire un des coins saillants du polygone - est fixée au corps de logement.
    According to the present invention, an edge of the outer peripheral part of the compression member is fixed to the housing body, whereby it is possible to fix the compression member in position easily. Consequently, it is possible to achieve an improvement in terms of the assembly and maintenance properties of the anti-shock bearing.
    Furthermore, the compression member is equipped with a load absorbing portion provided between the kitten and the housing body in the radial direction of the shaft.
    According to the present invention, the load generated by the displacement of the shaft in the radial direction can be reliably absorbed by the absorption portion of the compression member. Thus, it is possible to obtain significant gains in terms of impact resistance from the anti-shock bearing.
    In addition, a movement according to the present invention is provided with the aforementioned anti-shock bearing.
    Moreover, a timepiece according to the present invention is equipped with the aforementioned movement.
    [0024] According to the present invention, it is possible to provide a movement and a timepiece which guarantee high performance and superior impact resistance.
    According to the present invention, the compression member disposed on the outer face of the counter pivot in the axial direction is formed of a viscoelastic material so that, compared with the conventional technique in which the compression member Is a metal spring, it is possible to achieve high performance in terms of vibration attenuation. Consequently, in the compression member, even if the counter-pivot is displaced due to a shock or the like from outside, it is possible to absorb the displacement energy and, at the same time, It is possible to prevent the generation of excessive restoring force to suppress the load applied to the counter pivot and the shaft. Thus, by providing an anti-shock bearing with the compression member according to the present invention,
    BRIEF DESCRIPTION OF THE DRAWINGS
    [0026]
    FIG. 1 is a view from the outside of a timepiece according to a first embodiment.
    FIG. 2 is a plan view, from the front face, of a movement of a timepiece.
    FIG. 3 is a sectional view taken along the axis AA illustrated in FIG. 2.
    FIG. 4 is a sectional view of the anti-shock bearing according to the first embodiment.
    FIG. 5 is a plan view of the anti-shock bearing according to the first embodiment.
    FIG. 6 is a plan view of an anti-shock bearing according to a variant of the first embodiment.
    FIG. 7 is a sectional view taken along the axis BB illustrated in FIG. 6.
    FIG. 8 is a plan view of the anti-shock bearing according to a second embodiment.
    FIG. 9 is a sectional view taken along the axis CC illustrated in FIG. 8.
    FIG. 10 is a cross-sectional view of the anti-shock bearing according to a third embodiment. DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS First Embodiment In the following, a first embodiment of the present invention will be described with reference to the drawings.
    [0028] In what follows, after describing a mechanical wristwatch (which corresponds to the "timepiece" referred to in the claims, in what follows, reference will simply be made to the " Timepiece ") and a movement incorporated in this timepiece, an anti-shock bearing according to the first embodiment will be described in detail.
    Timepiece [0029] Generally, the mechanical body comprising the driving part of a timepiece is called "movement." What is obtained by mounting the dial and the hands to this movement, and putting everything together to Finishing in the case of a timepiece is commonly referred to as the "integrality" of the timepiece. Of the two sides of the plate constituting the platen of the timepiece, reference is generally made to the side where the case glass is located, that is to say the side where the dial is located, as being Rear face "of the movement. Of the two sides of the plate, reference is generally made to the side where the bottom of the timepiece, that is to say the side opposite to the dial, is located as the "front face" of the movement.
    [0030] FIG. 1 is a view from the outside of a timepiece 1 according to the first embodiment.
    [0031] As shown in FIG. 1, the entire timepiece 1 according to the present embodiment is equipped with a movement 100, a dial 11 having a scale or the like for indicating time information, and display needles Comprising a hour hand 12 indicating the time, a minute hand 13 indicating the minute, and a second hand 14 indicating the second, all within a case of a timepiece 3 consisting of In a case (not shown) and a window 2. A date window 11a showing a date indicating the date formed by an opening in the dial 11. Consequently, in the timepiece 1 it is possible to check not only The time but also the date.
    [0032] FIG. 2 is a plan view, on the front side, of the movement 100 of the timepiece 1. In FIG. 2, in order to make the drawing more readable, part of the usual components of the timepiece constituting the movement 100 have not been illustrated, and each component of the timepiece is shown in a simplified manner.
    [0033] As illustrated in FIG. 2, movement 100 of the mechanical timepiece has a plate 144 constituting the base plate. A winding stem 110 is rotatably incorporated in a winding stem guide hole 102 of the platen 144. The position of the winding crown 110 in the axial direction is determined by a communication device having an adjusting lever 103 , A rocker 105, a rocker spring 107, a jumper for the setting lever 109, and so on.
    [0034] Lorsque la tige de remontoir 110 est actionnée en rotation, un pignon de remontoir 112 est entraîné en rotation par celle d’une roue d’embrayage (non représentée). Par l’intermédiaire de la rotation du pignon de remontoir 112, une roue de couronne 114 et une roue à rochet 116 sont séquentiellement actionnées en rotation, et un ressort de barillet (non représenté), logé dans le barillet du mouvement 120, est remonté à son tour.
    Pivots (not shown) projecting at the ends of the barrel shaft, which is in fact an axis, are kept rotatable respectively by the plate 144 and a barrel bridge 134, the barrel of the movement 120 being thus held rotationally movable between the plate 144 and the barrel bridge 134. The pivots (not shown) protruding at the two ends of the shaft of the central wheel 124 (wheel and central pinion), a third wheel 126 (third wheel & pinion), a second wheel 128 (second wheel & pinion), and an escapement wheel 130 (wheel & sprocket) are respectively held in rotation by the plate 144 and a bridge of Wheel 136, these wheels and pinions being kept rotationally movable between the plate 144 and the gear train 136.
    When the barrel of the movement 120 is actuated in rotation by the restoring force of the barrel spring, the center wheel 124, the third wheel 126, the second wheel 128 and the exhaust wheel 130 are driven sequentially in Rotation of the barrel of movement 120. The movement barrel 120, the center wheel 124, the third wheel 126, and the second wheel 128 form a front wheel.
    When the center wheel 124 is actuated in rotation, the roadway (not shown) is simultaneously driven in rotation based on this rotation, and the minute hand 13 (see FIG. 1) mounted on this roadway indicates The current minute. Furthermore, based on the rotation of the carriageway, an hour wheel (not shown) is driven in rotation by means of the rotation of a minute wheel (not shown), and the hour hand (See Fig 1), mounted on this hour wheel, indicates the current time.
    An exhaust-regulating device 140 provided for controlling the rotation of the front wheel train is formed by the exhaust wheel 130, an anchor 142, and a balance-balance wheel 10.
    Teeth 132 are formed on the outer periphery of the exhaust wheel 130. The anchor 142 is held rotationally movable between the plate 144 and an anchor bridge 138 and is equipped with a pair of pallets 142a And 142b. The exhaust wheel 130 is temporarily at rest in a state in which one of the blades 142a of the anchor 142 is engaged with one of the teeth 132 of the exhaust wheel 130.
    Between the balance bridge 104 and the plate 144, the balance-balance 10 is kept rotatable by an anti-shock bearing 180 according to the embodiment described herein. The balance-balance 10 makes a rotary reciprocating motion in fixed cycles, one of the paddles 142a and the other paddle 142b of the anchor 142 being alternately engaged and disengaged from the teeth of the exhaust wheel 130, thereby causing the escapement wheel 130 to advance at a fixed speed.
    In this construction, after the barrel spring (not shown) housed in the barrel of the movement 120 has been raised using the winding stem 110, the movement barrel 120 is rotated by the torque which Is exerted when the barrel spring expands. By rotating the barrel of the movement 120, the center wheel 124, which is in mesh with the latter, also rotates. When the center wheel 124 is rotated, the third wheel 126 in engagement with the latter also rotates. When the third movable member 126 is rotated, the second movable member 128, in mesh with the latter, also rotates. When the second movable member 128 is rotated, the exhaust-regulating device 140 is actuated.
    Pulse balance [0042] FIG. 3 is a sectional view taken along the line AA visible in FIG. 2.
    [0043] As illustrated in FIG. 3, the balance spring 10 is mainly equipped with a balance wheel 20, a balance shaft 22 (which corresponds to the shaft "in the claims), and a balance spring 16. In the following description of the rocker arm It will be referred to the center axis O to denote the center of rotation of the balance-balance wheel 10 when the latter makes rotary reciprocating movements; The direction extending along the center axis O will be referred to as the axial direction, the direction orthogonal to the center axis O will be considered to be the radial direction and the direction in which the rotation occurs around the axis The center axis O will be considered as the peripheral direction. In addition, in FIG. 3
    The balance wheel 20 is a member formed in a substantially annular configuration from a metallic material such as iron, steel, or brass; It is mounted on and fixed to the balance shaft 22.
    The balance shaft 22 is a columnar shaft formed of a metallic material such as iron, steel, or brass. The balance shaft 22 has pivots 21 (respectively 21A and 21B, which correspond to the "ends of the shaft" referred to in the claims) at each end of the main body of the balance shaft 22a . The center axis of the balance shaft 22 coincides with the axis of center O, that is to say the axis of rotation about which the balance-balance 10 rotates.
    The spiral spring 16 is a disc-shaped spring made up of a plurality of thin turns wound around one another and formed of a metallic material such as iron or nickel, Resin material such as silicon resin or a resin material whose main ingredient is carbon or the like. The inner end of the balance spring 16 is fixed to a ferrule 18 which is itself fastened to the balance shaft 22. The outer end of the balance spring 16 is fixed to a peg 106 mounted on the balance bridge 104 .
    Anti-shock bearing [0051] FIG. 4 is a cross-sectional view of an anti-shock bearing according to the first embodiment.
    The anti-shock bearing 180 (an anti-shock bearing 180A and an anti-shock bearing 180B) are respectively provided at the two ends of the suction balance 10 in the axial direction. The pivots 21 of the balance shaft 22 are supported by the anti-shock bearing 180A and the anti-shock bearing 180B so that they are rotatably mounted about the center axis O. A shockproof bearing 180A And the other anti-shock bearing 180B have the same structure. In the description which follows, reference will be made to each of them simply as an anti-shock bearing 180 except in the case where the shock-proof bearing 180A and the shock-proof bearing 180B are to be distinguished one from the other 'other.
    As illustrated in FIGS. 3 and 4, the anti-shock bearing 180 is equipped with a housing body 181, a kitten 182, a holed stone 183, a counter pivot 184, and a compression member 185.
    As illustrated in FIG. 4, the housing body 181 has a bottom 181 integral with the remainder of the part and which has an insertion hole 181 h in the center thereof, a peripheral wall 181b tubular rising from the peripheral part of the bottom 181a, A receiving portion 181c extending radially beyond the tubular peripheral wall 181b on the side opposite the bottom 181a and a locking portion 181d rising above the outer peripheral portion of the receiving portion 181c.
    The peripheral edge of the insertion hole 181 h of the bottom 181a has a conical surface 181t. The conical surface 1811 is formed such that the dimensions of the inner diameter gradually decrease as one moves towards the bottom 181a.
    Furthermore, the edge formed by the peripheral wall 181b and the receiving portion 181c also has a conical surface 181s. The conical surface 181s is formed in such a way that the dimensions of the internal diameter gradually decrease as one moves towards the bottom 181a.
    In the internal surface of the locking portion 181d is formed a groove 181e whose cavity is oriented in the radial direction over the whole of its periphery. As described hereinafter, the groove 181e acts as a fastening portion for securing an outer peripheral portion 185a of the compression member 185 to the housing body 181.
    [0054] As illustrated in FIG. 3, in the anti-shock bearing 180A, the housing body 181 is mounted, being fitted to the balance bridge 104. In the anti-shock bearing 180B, the housing body 181 is mounted in such a way as to be fitted to the plate 144.
    Moreover, as illustrated in FIG. 4, the main body of the balance shaft 22a of the balance shaft 22 is inserted into the insertion hole 181h of the housing body 181 so that it is mounted free to rotate about the axis Of center O.
    The kitten 182 retains on its inner surface the perforated stone 183 and the counter pivot 184. In its central part, the kitten 182 comprises a base 182a formed integral with the rest of the part and which has a In which the pivot 21 of the balance shaft 22 is inserted, a tubular peripheral wall 182b rising above the outer peripheral portion of the base portion 182a, a receiving portion 182c s' Extending radially beyond the peripheral wall 182b, and a frame 182d rising above the outer peripheral portion of the receiving portion 182c.
    The outer peripheral surface of the base portion 182a comprises a conical surface 182t flush with the conical surface 1811 of the housing body 181.
    The peripheral portion of the receiving portion 182c has a conical surface 182 flush with the conical surface 181s of the housing body 181.
    The kitten 182 is housed inside the inner surface of the peripheral wall 181b of the housing body 181.
    The perforated stone is formed of a material having light transmitting properties (translucency) such as ruby. The pierced stone 183 is a substantially circular member in plan view and has a through hole 183h substantially at its center in this plan view. The pivot 21 of the balance shaft 22 is inserted into the through hole 183h. The outer peripheral surface 183a of the perforated stone 183 is press-fitted into the peripheral wall 182b of the kitten 182, thereby fixing the pierced stone 183 to the kitten 182.
    The pivot 21 is inserted into the main body 183h of the perforated stone 183, thus regulating the movements of the balance shaft 22 in the radial direction.
    [0062] Le contre-pivot 184 est un membre substantiellement circulaire selon une vue en plan, présentant des propriétés de transmission de lumière (translucidité) telle que le rubis. Sa surface interne dans la direction axiale du contre-pivot 184 est formée comme une surface plane 184f, et sa surface extérieure dans la direction axiale est formée d’une surface incurvée 184w, bombée vers l’extérieur.
    The counter pivot 184 is disposed on the outer surface of the perforated stone 183 in the axial direction. In the counter-pivot 184 an end surface 21 e in the axial direction of the pivot 21 is disposed opposite the central portion of the flat surface 184f on the side opposite to the balance shaft 22. In the counter pivot 184, The peripheral portion of the flat surface 184f is placed in the receiving portion 182c of the kitten 182. The curved surface 184w of the counter pivot 184 is inclined outwardly in the axial direction and protrudes out of the frame 182d of the kitten 182.
    The end surface 21 e in the axial direction of the balance shaft 22 is disposed with respect to the flat surface 184f of the counter pivot 184. The end surface 21e in the axial direction of The balance shaft 22 rests on the flat surface 184f of the counter pivot 184, thereby regulating the movement of the balance shaft 22 in the axial direction.
    Compression member [0065] FIG. 5 is a plan view of an anti-shock bearing according to the first embodiment.
    As illustrated in FIG. 5, the compression member 185 has a circular configuration in plan view and constitutes a plate of fixed thickness. The outer peripheral portion 185a of the compression member 185 is placed on the receiving portion 181c of the housing body 181 over its entire periphery and is retained by being compressed by the locking portion 181d.
    As illustrated in FIG. 4, a surface 185f of the compression member 185 on the opposite side to the counter pivot 184 extends along the entire curved surface 184w of the counter pivot 184, the compression member being curved with a central portion thereof Which is curved outwardly of the locking portion 181 d in the axial direction. The outer peripheral portion 185a of the compression member 185 is inserted into the groove 181e of the locking portion 181d, whereby the compression member 185 is retained by the housing body 181.
    The compression member 185 is formed of a viscoelastic material having vibration attenuation properties. In other words, compression member 185 has low repellant properties and strong attenuation properties; It attenuates displacement due to impact or the like received via counter pivot 184 and prevents the generation of excessive restoring force of compression member 185. Compression member 185 is formed of a viscoelastic material such as Rubber or silicone.
    It is desirable for the compression member 185 to be formed of a material having translucency properties so that the counter pivot 184 can be visible. This makes it possible to guarantee better aesthetic properties in terms of design for the balance-balance 10.
    Operation When an impact is applied from the outside, for example to the timepiece 1, the anti-shock bearing 180 operates as follows.
    When the balance shaft 22 is displaced in the axial direction due to an impact from the outside, the balance shaft 22 and the counter pivot 184 are displaced outwardly in the axial direction, the pivot pin 21 of the balance shaft 22 remaining in contact with the counter pivot 184. Then, due to the displacement of the counter pivot 184 outwardly in the axial direction, the compression member 185 undergoes elastic deformation to present a Bending outwards in the axial direction. The compression member 185 absorbs the load of the counter-pivot 184 and elastically removes the movement of the counter-pivot 184 and the balance shaft 22; And at the same time restores its shape to the compression member 185 by attenuating the vibrations of the balance shaft 22. Thus,
    Moreover, when the balance shaft 22 is displaced in the radial direction due to a load coming from the outside, the movement of the pierced stone 183 is transmitted to the kitten 182; Then the kitten 182 is slidably moved along the conical surface 1811 and the other conical surface 181s of the housing body 181. At this time, the kitten 182 is moved radially and axially outwardly along These conical surfaces 181t and 181s. Therefore, the counter pivot 184 retained by the kitten 182 is moved radially and axially outwardly. Then, due to the displacement of the counter-pivot 184 outwardly in the radial direction and outwardly in the axial direction, the compression member 185 undergoes elastic deformation and bulges outwardly in the axial direction. Consequently, the compression member 185 absorbs the load of the counter-pivot 184 and elastically suppresses the displacement of the counter-pivot 184 and the balance shaft 22; And at the same time restores its shape to the compression member 185 by attenuating the vibrations of the balance shaft 22. Thus, the balance shaft 22 can return to the position it occupied prior to its displacement.
    According to the embodiment described herein, the compression member 185 disposed on the outer face of the counter-pivot 184 in the axial direction is formed of a viscoelastic material so that, in comparison with the state of The technique where the compression member 185 was a metal spring, it is possible to obtain better performance in terms of vibration attenuation. Consequently, even when the counter-pivot 184 is displaced due to an impact from the outside or the like, it is possible to absorb the displacement energy and at the same time it is possible to prevent Generating an excessive return force to suppress the load applied to the counter pivot 184 and the balance shaft 22. Thus,
    In addition, by covering the counter-pivot 184 with the compression member 185, it is possible to transmit to the compression member 185 the load generated by the displacement of the counter-pivot 184 due to an impact coming from the outside or similar. Thus, it is possible to improve the impact resistance of the anti-shock bearing 180.
    Moreover, only by inserting the outer peripheral portion 185a of the compression member 185 into the groove 181e of the housing body 181, it is possible to easily effect the fixing of the compression member without the need to resort to a member For fixing it to the housing body 181. Thus, it is possible to provide an inexpensive shock-absorbing bearing 180 which makes improvements in terms of impact resistance.
    The movement 100 and the timepiece 1 according to the present embodiment are equipped with the anti-shock bearing 180 previously described, so that it is possible to provide a movement 100 and a timepiece 1 With high performance and superior impact resistance.
    Variant of the First Embodiment In the following, a variant of the first embodiment will be described.
    Whereas according to the first embodiment, the compression member 185 is of circular shape according to a plan view (see FIG. 5), such a configuration should not be interpreted in a limiting manner.
    [0079] FIG. 6 is a plan view of an anti-shock bearing according to a variant of the first embodiment, and FIG. 7 is a sectional view taken along the axis BB visible in FIG. 6.
    As illustrated in FIGS. 6 and 7 a compression member 185B may assume a substantially triangular configuration in a plan view taken in the direction of the center axis O. The compression member 185B is retained by inserting an edge 185z corresponding to the outer peripheral portion 185a into the groove 181e of the locking portion 181d of the housing body 181.
    The configuration of the compression member 185B according to this plan view is not limited to the substantially triangular configuration; It could also take, for example, the shape of a substantially rectangular or pentagonal configuration according to this plan view.
    According to this first modified embodiment, by fixing the edge 185z of the outer peripheral part 185a of the compression member 185B to the housing body 181, it is possible to easily fix the compression member 185B in position. Consequently, it is possible to improve the assembly and holding properties of the anti-shock bearing 180.
    Second Embodiment [0083] FIG. 8 is a plan view of an anti-shock bearing according to a second embodiment, and FIG. 9 is a sectional view taken along the axis CC shown in FIG. 8.
    In the following, an anti-shock bearing according to a second embodiment for the present invention will be described.
    In the first embodiment, the compression member 185 constituting the anti-shock bearing is retained by its insertion into the groove 181e of the locking portion 181 d of the housing body 181 (see FIG. 4).
    Here, on the other hand, as illustrated in FIGS. 8 and 9 the anti-shock bearing 280 according to the second embodiment differs from the first embodiment in that the compression member 185 is fixed in position by means of an annular fastener 286. With respect to the Second embodiment described below, the components which are identical to those of the first embodiment will be indicated by the same reference numbers, and their description will not be repeated in detail.
    The anti-shock bearing 280 is provided with a housing body 281, the kitten 182, the pierced stone 183, the counter-pivot 184, the compression member 185, and the fastener 286.
    A female screwing portion 281e is formed in the inner surface of a support frame 281d of the housing body 281.
    The fastener 286 is fixed inside the support frame 281 d of the housing body 281. The fastener 286 is formed in an annular configuration and consists, for example, of a resin or metal. On the outer peripheral surface of the fastener 286 is formed a male screwing portion 286e to be engaged by screwing into the female screwing portion 281e of the support frame 281 d. Furthermore, in the outer surface of the fastener 286 in the axial direction, there is a tool engaging groove 286t for cooperation with a tool such as a screwdriver.
    As illustrated in FIG. 9 the compression member 185 formed of a viscoelastic material is arranged inside the support frame 281 d of the housing body 281. The outer peripheral portion 185a of the compression member 185 is compressed against the receiving portion 181c Housing 281 for screw fastening by screwing the fastener 286 into the support frame 281 d. The compression member 185 rests on the curved surface 184w of the counter pivot 184 which has an outwardly curved bending in the axial direction in a curved state.
    According to the second embodiment, after fixing the compression member 185 to the housing body 281, the fastener 286 is engaged by screwing, as a fastening part, to the housing body 281, so that The compression member 185 can be easily fixed in position. Consequently, it is possible to improve the assembly and holding properties of the anti-shock bearing 280.
    Third Embodiment [0092] FIG. 10 is a cross-sectional view of an anti-shock bearing according to a third embodiment.
    In the following, an anti-shock bearing according to a third embodiment of the present invention will be described.
    In the first and second embodiments, the compression member 185 was disposed on the outside with respect to the counter-pivot 184 in the axial direction (see FIGS. 4 and 7).
    Here, however, as illustrated in FIG. 10 the third embodiment differs from the first embodiment and the second embodiment in that the compression member 385 is provided with an outer peripheral wall 385w located at the outer periphery of a kitten 382. In FIG. With respect to the third embodiment described below, the components which are identical to those of the first and second embodiments will be indicated by the same reference numbers and their description will not be repeated in detail.
    [0096] As illustrated in FIG. 10, the anti-shock bearing 380 is provided with a housing body 381, the kitten 382, ​​the pierced stone 183, the counter pivot 184, the compression member 385, and the fastener 286.
    The kitten 382 has a base 382a, integral with the remainder of the kitten 382, ​​and which has an insertion hole 382h, a tubular peripheral wall 382b, which rises above the inner side of the portion Peripheral wall 382a, a receiving portion 382c formed on the inner side of the distal end of the peripheral wall 382b and a frame portion 382d rising above the outer peripheral portion of the receiving portion 382c.
    On the outer peripheral surface of the base 382a is formed a conical surface 382t which is in contact with the conical surface 1811 of the housing body 381.
    The compression member 385 takes the form of a closed cylinder having a plate-shaped portion 385p integral with the cylindrical portion. It has a planar , circular configuration having a fixed thickness, and an outer peripheral wall 385w (corresponding to the "load absorbing portion" in the claims) which is disposed so that it Extends toward the bottom 181a of the housing body 381 from the outer peripheral portion of the plate-shaped portion 385p.
    The plate-shaped portion 385p of the compression member 385 is arranged such that it extends along the counter pivot 184. The outer peripheral wall 385w of the compression member 385 is arranged such that It lies between the peripheral wall 382b of the kitten 382 and the peripheral wall 181b of the housing body 381 in the radial direction.
    When the balance shaft 22 is displaced in the axial direction due to a load from the outside, the balance shaft 22 and the counter pivot 184 are moved outwardly in the axial direction , In a state in which the pivot 21 of the balance shaft 22 is held in contact with the counter pivot 184. The compression member 385 absorbs the load of the counter pivot 184 and elastically suppresses the displacement of the counter pivot 184 and the balance shaft 22; And at the same time restores its shape to the compression member 385 while attenuating the vibrations of the balance shaft 22. Thus, the balance shaft 22 can return to the position it occupied before being displaced.
    When the balance shaft 22 is moved in the radial direction due to a load from the outside, the movement of the pierced stone 183 is transmitted to the kitten 382; Then the kitten 382 is slidably moved along the conical surface 1811 of the housing body 381. At this time the kitten 382 is moved radially and axially outwardly along the conical surface 181t. At this time, the outer peripheral wall 385w of the compression member 385 undergoes an elastic deformation in the direction of the thickness. Consequently, the compression member 385 absorbs the load of the counter-pivot 184 and the kitten 382, ​​and elastically suppresses the displacement of the counter-pivot 184 and the balance shaft 22; and at the same time,
    [0103] Selon le troisième mode de réalisation, la charge générée par l’intermédiaire du déplacement dans la direction radiale de l’arbre de balancier 22 peut être absorbée de manière fiable par la paroi périphérique extérieure 385w du membre de compression 385. Ainsi, il est possible d’obtenir des gains significatifs en termes de résistance aux chocs de la part du palier anti-choc 380.
    [0104] Le domaine technique couvert par cette invention n’est pas limité aux modes de réalisation décrits ci-dessus, et diverses variantes seraient possibles sans sortir du cadre ni de l’esprit de la présente invention.
    权利要求:
    Claims (10)
    [1] 1. A compression member (185, 185B, 385) provided on an anti-shock bearing (180, 280, 380) provided with: a counter pivot (184) disposed opposite an end surface (21e) Of a shaft (22) in the axial direction, a perforated stone (183) having a pin (21 A, 21 B) inserted therein, a kitten (182, 382) (182) and the pierced stone (183), and a housing body (181,281,381) receiving the kitten (182,382), at least a portion of the compression member (185,185B, 385) being arranged on the surface Of the counter-pivot (184) in the axial direction to retain the counter-pivot (184); And the compression member (185, 185B, 385) being formed of a viscoelastic material.
    [2] 2. An anti-shock bearing (180, 280, 380) comprising: a counter pivot (184) disposed opposite an end surface (21e) of a shaft (22) in the axial direction, A holed stone (183) having a pin (21 A, 21 B) of the shaft (22) inserted therein, a pin (182, 382) retaining the counter pivot (184) and the holed stone (183) (182, 382), and a compression member (185, 185B, 385) at least a portion of which is arranged on the outer surface of the counter pivot (184) in the housing Axial direction and which retains the counter-pivot (184); The compression member (185, 185B, 385) being formed of a viscoelastic material.
    [3] 3. An anti-shock bearing (180, 280, 380) according to claim 2, further comprising an attachment portion (181e, 281e) capable of securing an outer peripheral portion (185a, 385a) of the compression member (185,185B, ) To the housing body (181, 281, 381), wherein the compression member (185, 185B, 385) is secured to the fixing portion and is arranged such that it covers at least a portion of the counter pivot ).
    [4] The anti-shock bearing according to claim 3, wherein the fixing part is a groove provided in the inner surface of the housing body and in which the outer peripheral part of the limb (181) Of compression (185, 185B) is inserted for its fastening.
    [5] The anti-shock bearing (280,380) of claim 3, wherein the attachment portion is an annular fastener (286,386) which is threadably engaged in the housing body (281,381) and retains the peripheral portion (185a, 385a) of the compression member (185, 385).
    [6] 6. An anti-shock bearing (180, 280, 380) according to one of claims 3 to 5, wherein the compression member (185, 385) is circular in shape from the axial direction and is arranged That it covers the entire surface of the counter-pivot (184).
    [7] 7. An anti-shock bearing (180) according to claim 3, wherein the compression member (185B) is of polygonal configuration seen from the axial direction and an edge (185z) of the compression member is fixed To the housing body (181).
    [8] 8. An anti-shock bearing (380) according to claim 2, wherein the compression member (385) is provided with a load absorbing portion (385w) provided between the kitten (382) and The housing body (381) in the radial direction of the shaft (22).
    [9] 9. A movement (100) equipped with an anti-shock bearing (180, 280, 380) as claimed in one of claims 1 to 8.
    [10] 10. A timepiece (1) equipped with a movement (100) as claimed in claim 9.
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    同族专利:
    公开号 | 公开日
    CN106842888A|2017-06-13|
    JP2017058248A|2017-03-23|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    CH237433A|1942-07-20|1945-04-30|Leuthold Fritz|Shock-proof bearing for journals of watches or similar fine mechanical devices.|
    CH299772A|1951-05-19|1954-06-30|Seitz Pierre|Bumper bearing, mainly but not exclusively for clockwork pivot.|
    JPS5291146U|1975-12-29|1977-07-07|
    CN101853001B|2010-05-17|2011-08-17|上海关勒铭有限公司|Production process of shockproof seat|
    CN201802809U|2010-09-09|2011-04-20|东南大学|Anti-torque vibration isolation and damping device for viscoelastic damping|
    EP2450759B1|2010-11-09|2020-08-12|Montres Breguet SA|Magnetic shock absorber|
    JP2013088179A|2011-10-14|2013-05-13|Seiko Instruments Inc|Antishock bearing mechanism of balance, balance provided with the antishock mechanism, and watch provided with the same|
    CH706640B1|2012-06-21|2021-03-15|Eta Sa Mft Horlogere Suisse|Shockproof bearing for timepiece.|
    CN203930350U|2013-12-20|2014-11-05|Eta瑞士钟表制造股份有限公司|Damping bearing, comprise the movement of this damping bearing and comprise the clock and watch of this movement|
    法律状态:
    2020-01-15| AZW| Rejection (application)|
    优先权:
    申请号 | 申请日 | 专利标题
    JP2015183050A|JP2017058248A|2015-09-16|2015-09-16|Pressing member, antishock bearing, movement, and timepiece|
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