• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    The present invention relates to a balance spring adjusting mechanism (7) for easily adjusting a pin (53) in a desired direction, a balance wheel bridge unit, a movement and a timepiece including the balance spring adjusting mechanism ( 7). The hairspring adjustment mechanism (7) comprises a hairspring (23); a stud (53) which is connected to an outer end (29) of the hairspring (23), which is movable in a first direction (D1) along a first axis (O) parallel to a central axis (C) of the hairspring (23), and is rotatable in a second direction (D2) about the first axis (O). According to one embodiment, a piton support (37) which is connected to a balance bridge According to one embodiment, a piton support (37) which is connected to a balance bridge (6); a eyebolt holder (54) for keeping the eyebolt (53) mobile in the first direction (D1) and is rotatably mounted in the second direction (D2); and a eyebolt screw (55) which is configured to prevent movement of the eyebolt (53) in the first direction (D1) relative to the eyebolt holder support (37) while resting against the eyebolt (53).
    公开号:CH717088A2
    申请号:CH00082/21
    申请日:2021-01-28
    公开日:2021-07-30
    发明作者:Ito Kengo；Kawauchiya Takuma；Fujieda Hisashi；Yuichi Mori
    申请人:Seiko Watch Kk；
    IPC主号:
    专利说明:

    Background of the invention
    1. Field of the invention
    The present invention relates to a balance spring adjusting mechanism, a balance bridge unit, a movement and a timepiece.
    2. Description of the prior art
    In the prior art, there are known mechanical timepieces using a hairspring fixed to the center of a sprung balance. In a mechanical timepiece, the dimension of the eyebolt which holds an outer end of the hairspring may differ from one piece to another due, for example, to a manufacturing error. In such a case, various techniques for adjusting the isochronism of the mechanical timepiece by adjusting the position of the pin have been proposed.
    [0003] For example, Japanese Patent No. 4976262 (D1) discloses a configuration of an oscillation system of a timepiece including a hairspring to which an inner end is connected to a balance shaft, a pin of balance spring (piton) which holds an outer end of the hairspring, and an adjustment screw which is fixed to the pin and turns the outer end of the hairspring. According to the technique described in D1, the outer end of the hairspring can optionally be moved and changed orientation by rotating the adjustment screw and by moving the adjustment screw in an axial direction. Consequently, it is possible to offset the hairspring with respect to its center so as to reduce any isochronism error.
    However, in the technique described in D1, a configuration is proposed according to which the outer end of the hairspring is moved in a direction included in the plane of the hairspring and which is orthogonal to the central axis of the hairspring, but a mechanism which moves the outer end of the hairspring in a direction parallel in height to the central axis is not provided. Therefore, in a case of height adjustment of the outer end of the hairspring, it is necessary to change the shape of the hairspring using tweezers or the like, and highly skilled skill is required. Therefore, it is desired to provide, within the scope of the following invention, a configuration whereby a peg can be easily moved in a desired direction regardless of special skills and more particularly of a high skill level of an operator.
    Summary of the invention
    An object of the present patent application is to provide a balance spring adjustment mechanism capable of easily adjusting a stud in a desired direction, and a balance bridge unit, a movement, and a timepiece including such a hairspring adjustment mechanism.
    [0006] A hairspring adjustment mechanism is provided according to this aspect of the patent application. The hairspring adjustment mechanism includes: a hairspring configured as a spiral; and a stud which is connected to an outer end of the hairspring and is rotatably mounted in a first direction along a first axis parallel to a central axis of the hairspring, and movable in a second direction around the first axis.
    [0007] According to this configuration, the eyebolt can be adjusted along the first direction and the second direction of the hairspring. Therefore, the outer end of the hairspring held by the eyebolt can be rotated in the second direction and moved along the first direction. Consequently, it is possible to adjust the position of the hairspring by moving the eyebolt in at least two directions chosen from the first direction and the second direction.
    [0008] Therefore, it is possible to provide a hairspring adjusting mechanism capable of easily adjusting the eyebolt in a desired direction.
    [0009] In addition, this makes it possible to align the eyebolt regardless of a skill or skill level of an operator compared to the prior art, so that the maneuverability at the time of manufacture can be facilitated, and the product quality can be kept in a stable and good condition.
    [0010] Furthermore, the hairspring adjustment mechanism includes: a piton support which is connected to a balance bridge; a eyebolt which is configured so as to hold the eyebolt movably in the first direction and is kept rotatable in the second direction; and an eyebolt fixing member which is configured to prevent movement of the eyebolt in the first direction relative to the eyebolt support by abutting the eyebolt.
    [0011] According to this configuration, the eyebolt support rotatably supports the eyebolt holder, and the eyebolt holder keeps the eyebolt movably in the first direction. Furthermore, the eyebolt fixing element controls the movement of the eyebolt in the first direction with respect to the eyebolt holder. Therefore, when the eyebolt holder is rotated in a state where the movement of the eyebolt is prevented by the eyebolt fixing member, the eyebolt is rotated integrally with the eyebolt carrier vis-à-vis the support. of piton. Therefore, the eyebolt can be moved in the first direction and the second direction independently of each other with respect to the eyebolt support.
    Since the eyebolt is kept movable in rotation by the eyebolt support via the eyebolt holder, the eyebolt is moved in the first direction and the second direction independently of one another. Therefore, for example, compared to the case where the eyebolt is fixed directly to the eyebolt support, and the eyebolt is moved freely in the first direction and the second direction with respect to the eyebolt support, the eyebolt support may not be. moved only in a direction to adjust. Therefore, by performing the adjustment in the first direction and the second direction independently of each other, the adjustment in each direction can be carried out more easily, and therefore the handling can be improved.
    In addition, in the hairspring adjustment mechanism, the eyebolt support keeps the mobile eyebolt support in rotation in the second direction.
    According to this architecture, the eyebolt can be rotatably attached to the eyebolt support via the eyebolt holder. Therefore, it is possible to provide a hairspring adjusting mechanism capable of moving the eyebolt in the first direction and the second direction via a simple configuration.
    In addition, the hairspring adjustment mechanism includes: a guide plate which is arranged to overlap with the eyebolt support, and is configured to keep the movable eyebolt holder in rotation in the second direction; a guide plate cover which is arranged to overlap with the guide plate on the side opposite to the eyebolt support; and an adjustment member configured to adjust the distance between the eyebolt support and the guide plate cover, the guide plate being attached to the adjustment member and having an elongated hole which is elongated in a third direction along it. 'a rectilinear line connecting the central axis to the first axis when the latter is seen in the axial direction of the central axis.
    According to this configuration, the guide plate rotatably supports the eyebolt support and is moved in the third direction along a longitudinal direction of the oblong hole, in a state where it is sandwiched between the eyebolt support and guide plate cover. When the guide plate is moved in the third direction, the eyebolt holder and the eyebolt are moved in the third direction integrally with the guide plate. Consequently, the eyebolt can be moved in three directions chosen from the first direction, the second direction and the third direction with respect to the eyebolt support. Therefore, it is possible to add a degree of freedom when adjusting the eyebolt.
    The adjusting element adjusts the distance between the eyebolt support and the guide plate cover so that the eyebolt support and the guide plate cover are close to each other, such that the guide plate is sandwiched between the guide plate cover and the eyebolt support. The adjustment element is fixed to the oblong hole in the guide plate. Therefore, the movement of the guide plate in the third direction can be prevented by adjusting the adjusting member. In addition, the guide plate can be moved along the third direction while the oblong hole is aligned with the adjustment member by adjusting the distance between the eyebolt bracket and the guide plate cover so that the eyebolt support and guide plate cover are separated from each other.
    Furthermore, in the hairspring adjustment mechanism, the adjustment element is preferably a cover screw which is fixed to the eyebolt support and compress the guide plate cover towards the eyebolt support, and the cover screw is inserted into the oblong hole.
    [0019] According to this configuration, the cover screw compresses the guide plate cover towards the eyebolt support by being fixed thereto, and the guide plate is sandwiched between the guide plate cover and the eyebolt support. The cover screw is inserted into the oblong hole in the guide plate. Therefore, the movement of the guide plate in the third direction can be prevented by fixing the cover screw. On the other hand, by releasing the fixing of the cover screw, the guide plate can be moved along the third direction while the oblong hole is aligned with the cover screw.
    [0020] Furthermore, in the hairspring adjustment mechanism, the eyebolt fixing element is preferably a eyebolt fixed to the eyebolt holder.
    According to this architecture, when the eyebolt carrier is rotated while the eyebolt screw is fixed, the eyebolt is rotated integrally with the eyebolt carrier relative to the eyebolt support. Therefore, the eyebolt can be moved independently in the first direction and the second direction with respect to the eyebolt support. In addition, by fixing the eyebolt screw, any relative movement between the eyebolt holder and the eyebolt can be prevented. Therefore, it is possible to provide a hairspring adjusting mechanism capable of fixing the eyebolt using a simple configuration.
    In addition, in the hairspring adjustment mechanism, the eyebolt has a compression surface against which the eyebolt abuts, and is rotated in the second direction with the eyebolt support while the bolt eyebolt is in abutment against the compression surface.
    According to this configuration, since the eyebolt has a compression surface against which the eyebolt abuts, the eyebolt and the eyebolt are easily brought into mutual contact. In addition, compared to the case where the eyebolt does not have a compression surface, it is possible to prevent the eyebolt from being rotated with respect to the eyebolt holder when the eyebolt is fixed. Therefore, in particular, when it is desired to move the peak only in the first direction, it is possible to prevent the peak from unintentionally turning. In addition, the eyebolt is rotated integrally with the eyebolt support while the eyebolt abuts against the compression surface. Therefore, in particular, when it is desired to move the peak only in rotation (that is to say in the second direction), it is possible to prevent the peak from being unintentionally moved in the first direction. Therefore, it is possible to move the peak in each of the two directions, that is, the first and the second direction independently of each other, and the maneuverability can be improved.
    In the hairspring adjustment mechanism, the outer end of the hairspring can be arranged in a different position in the first direction with respect to the main body of the hairspring having a spiral shape.
    According to this configuration, it is possible to provide different positions in the first direction relative to the main body of the hairspring to what is called a winding hairspring having an outer end. Therefore, the versatility of the hairspring adjusting mechanism can be improved.
    A balance bridge unit according to the patent application includes the balance spring adjustment mechanism described above.
    According to this configuration, since the hairspring adjustment mechanism is provided, it is possible to move the eyebolt along the first direction and the second direction of the hairspring.
    [0028] Therefore, it is possible to provide a balance bridge unit including the hairspring adjusting mechanism capable of easily adjusting the eyebolt in a desired direction and having improved operating accuracy.
    [0029] Further, the balance bridge unit includes a sprung balance to which the spring is attached, and the sprung balance includes an annular balance wheel, usually referred to as a balance, and a balance screw attached to the balance.
    According to this configuration, it is possible to apply a so-called free spring method according to which the moment of inertia of the balance is adjusted by an amount of fixing (an amount of projection in the radial direction relative to the balance) of the balance screw. Therefore, according to a free spring method without using, for example, a regulator, it is possible to provide a balance bridge unit capable of precisely adjusting any isochronism deviation.
    A movement according to the patent application includes the balance bridge unit described above.
    [0032] According to this configuration, a high performance movement including the balance bridge unit including the hairspring adjustment mechanism capable of easily adjusting the eyebolt to the desired direction can be obtained.
    A timepiece according to the patent application includes the movement described above.
    According to this configuration, the timepiece includes the movement described above, and the movement includes the hairspring adjustment mechanism described above. Therefore, by moving the eyelet along the first direction and the second direction of the hairspring, it is possible to adjust any isochronism deviation.
    [0035] Therefore, it is possible to provide a timepiece which includes the hairspring adjusting mechanism capable of easily adjusting the eyebolt in each of the first and second direction and which is capable of easily regulating any deviation in terms of isochronism.
    According to the patent application, it is possible to provide a hairspring adjustment mechanism capable of easily adjusting the eyebolt in the desired direction, and a balance bridge unit, a movement and a timepiece including a such hairspring adjustment mechanism.
    Brief description of the drawings
    Figure 1 is an external view of a timepiece according to a first embodiment. Fig. 2 is a plan view of a movement according to the first embodiment as seen from a front side. Fig. 3 is a plan view of a balance bridge unit according to the first embodiment seen from the front. Fig. 4 is a perspective view of the balance bridge unit according to the first embodiment. Figure 5 is a sectional view taken along a V-V line visible in the figure. 3. Fig. 6 is a perspective view of a balance bridge unit according to a second embodiment. Fig. 7 is a plan view of the balance bridge unit according to the second embodiment seen from the front. Figure 8 is a plan view of the balance bridge unit in which a guide plate cover in Figure 7 is not shown. Figure 9 is a sectional view taken along a line IX-IX shown in Figure 7. Figure 10 is a sectional view taken along a line XX shown in Figure 7. Figure 11 is a plan view of a balance bridge unit according to a third embodiment as seen from the front. Figure 12 is a sectional view taken along a line XII-XII visible in Figure 11.
    Description of the embodiments
    [0038] Hereinafter, embodiments of the invention will be described with reference to the drawings.
    (First embodiment)
    (Timepiece)
    Figure 1 is an external view of a timepiece 1 according to a first embodiment.
    [0040] The timepiece 1 is configured to incorporate a movement 2, a dial 13 having a scale indicating time information or the like, and various hands (an hour hand 14, a minute hand 15 and a seconds hand 16) in a housing 12 including a back (not shown) and a mirror 11.
    (Movement)
    Figure 2 is a plan view of the movement 2 according to the first embodiment as seen from the front. In Figure 2, in order to make the drawings more visible, part of the timepiece components constituting the movement 2 have not been shown, and the timepiece components are shown in a simplified manner. In the following description, the crystal side 11 (dial side 13) of the case 12 of the timepiece (see FIG. 1) will be designated as constituting the “rear” of the movement 2 with respect to the plate 17 forming the base plate of movement 2, and the back side (side opposite to dial 13) as constituting the “front” of movement 2.
    The movement 2 comprises the main plate 17, a finishing gear (not shown) including a movement barrel, a center mobile, a third mobile and a fourth mobile, as well as a regulation and exhaust unit 3 to control the rotation of the cog. Movement 2 shown is an example of a movement for a self-winding timepiece equipped with an oscillating weight. However, the invention is not limited to such a case, and can be used with a movement for a manually wound timepiece via an adjusting rod 18.
    The seconds hand 16 illustrated in Figure 1 is rotated on the basis of the rotation of the fourth mobile, and is also driven at a rotational speed adjusted by the exhaust and regulation unit 3, that is, one rotation per minute. The minute hand 15 is rotated based on the rotation of the center wheel set or that of a center wheel which is rotated with that of the center wheel set, and is also driven at a rotational speed adjusted by the regulating and exhaust unit 3, that is, one rotation per hour. The hour hand 14 is rotated based on the rotation of an hour wheel which is rotated by that of the center mobile via a minute wheel, and is also driven at a rotational speed adjusted by the exhaust and a regulating unit 3, that is to say, one rotation every 12 hours or every 24 hours.
    The exhaust and regulation unit 3 include an exhaust mobile and an anchor (not shown) which mesh with the fourth mobile, and a balance bridge unit 4. The anchor causes the escape of the mobile exhaust. The balance bridge unit 4 includes a sprung balance 5 which operates smoothly in a constant cycle.
    (Balance bridge unit)
    Figure 3 is a plan view of the balance bridge unit 4 according to the first embodiment, seen from the front. Fig. 4 is a perspective view of the balance bridge unit 4 according to the first embodiment. Figure 5 is a sectional view taken along the line V-V of Figure 3.
    As illustrated in Figures 3 to 5, the balance bridge unit 4 includes the sprung balance 5, a balance bridge 6 and a balance spring adjustment mechanism 7.
    As shown in Figures 3 and 5, the sprung balance 5 includes a balance shaft 21, a balance 22 and a hairspring 23. The balance shaft 21 is rotatably mounted about a central axis C. L The balance shaft 21 is kept movable in rotation by the balance bridge 6, which will be described later, via a bearing 36.
    In the following description, reference will be made to an axial direction to denote a direction extending along the central axis C of the balance shaft 21, to a radial direction to denote a direction orthogonal to the 'central axis, and finally to a peripheral direction to denote a direction in orbit around the central axis C.
    The balance 22 comprises a hub 24 fixed to the balance shaft 21 by driving or the like, an annular rim 25 surrounding the hub 24 from the outside in the radial direction, and a connection part 26 connecting the hub 24 to the rim 25. A balance screw 27 is fixed to the rim 25 of the balance 22. In this embodiment, four balance screws 27 are provided and evenly distributed at equal distances in the peripheral direction of the balance 22.
    The hairspring 23 is disposed between the balance shaft 21 and the balance 22. The hairspring 23 is a flat hairspring spring when viewed in the axial direction, and is wound along a curve of Archimedes. An internal end 28 of the hairspring 23 is connected to the balance shaft 21 via a ferrule 31 (see FIG. 5). An outer end 29 of the hairspring 23 is connected to a pin 53 of the hairspring adjustment mechanism 7, which will be described in detail later. The outer end 29 of the hairspring 23 is disposed in a different position from a main body of the hairspring 30 having a spiral shape and from the inner end 28 in the axial direction. More specifically, the outer end 29 of the hairspring 23 is located at the front (on the side of the balance bridge 6 which will be described later) in the axial direction going from the main body of the hairspring 30 to the inner end 28.
    The balance shaft 21 is rotated alternately d back and forth in a constant oscillation cycle around the central axis C thanks to the energy transmitted by the hairspring 23. One end 21a (front end) of the balance shaft 21 in the axial direction is supported by the balance bridge 6 via the bearing 36, and the other end 21b (rear end) is supported by a bearing (not shown) formed in plate 17 (see figure 2). A cylindrical oscillation plate 19 (see figure 5) linked to the anchor described above is attached to the outside of the other end 21b of the balance shaft 21.
    As illustrated in Figure 4, the balance bridge 6 is disposed at the front of the sprung balance 5 in the axial direction. The balance bridge 6 includes a fixing base 35, the bearing 36 and a piton support 37.
    The fixing base 35 extends on both sides in the radial direction from the central axis C seen from the axial direction. The fixing base 35 has a form of a flat plate extending in the axial direction in the direction of thickness. The two ends of the fixing base 35 have, according to their direction of extension, an arcuate shape which corresponds to the shape of the housing 12 (see also FIG. 2). A plurality of fixing holes 38 penetrating in the axial direction are formed in the fixing base part 35. The balance bridge unit 4 is fixed to the plate 17 (see figure 2) via fixing screws (not shown) inserted into the respective fixing holes 38. The fixing base 35 has a central hole 39 coaxial with the central axis C. As shown in FIG. 5, a portion of the fixing base 35 which forms the outer periphery of the central hole 39 is defined as forming a cylindrical bearing 40. The cylindrical bearing 40 is arranged so as to be located at a lower stage vis-à-vis the rear of the fixing base 35.
    The bearing 36 is a so-called "anti-shock" bearing, and includes a chaton 43, a perforated stone 44 and a counter-pivot 45.
    The kitten 43 is fitted into the cylindrical bearing 40 from the front in the axial direction. Therefore, the chaton 43 is arranged coaxially with the central axis C and is fixed to the balance bridge 6.
    The holed stone 44 is fixed to the chaton 43. The holed stone 44 rotatably supports the end 21a of the balance shaft 21.
    The counter-pivot 45 is arranged so as to be superimposed on the perforated stone 44, and supports the end 21a of the balance shaft 21 from the front. A spring for retaining the counter-pivot (not shown) which compresses the counter-pivot 45 towards the balance shaft 21 is arranged on the counter-pivot 45, being superimposed on the latter.
    The configuration of the bearing 36 is given simply by way of example, but is not limited to the architecture described above as long as the balance shaft 21 remains mounted mobile in rotation.
    As illustrated in Figure 5, the eyebolt support 37 is mounted outside the cylindrical bearing 40 of the fixing base 35 via a plate 41 arranged on the outer periphery of the cylindrical bearing 40. As illustrated in the figure 4, the eyebolt support 37 includes a gripping portion 46 and a piton arm 47 connected to the gripping portion 46. The gripping portion 46 is C-shaped in plan view viewed in the axial direction. The gripping portion 46 slides relative to the cylindrical bearing 40 when a predetermined rotary torque is applied to it. Therefore, the eyebolt support 37 can be rotated about the central axis C.
    The eyebolt arm 47 is arranged outside the gripping part 46 in the radial direction. More specifically, the eyebolt 47 has an L-shape consisting of a base 48 extending outside the outer periphery of the gripping portion 46 in the radial direction, and an extended portion 49 extending from there. outside the outer diameter of the base 48 in the peripheral direction. Seen in the axial direction, a U-shaped groove 50 which opens towards the periphery is formed by the gripping part 46 and the eyebolt arm 47.
    (Spiral adjustment mechanism)
    The hairspring adjustment mechanism 7 includes the hairspring 23, the eyebolt 53, a eyebolt holder 54 and a eyebolt 55 (corresponding to the eyebolt fixing element in the claims).
    As shown in Figure 5, the pin 53 maintains the outer end 29 of the hairspring 23. The pin 53 has a cylindrical shape centered on a first axis O parallel to the central axis C. The pin 53 is arranged in the U-shaped groove 50 formed by the grip portion 46 and the eyebolt arm 47. The eyebolt 53 includes an attachment surface 56 and a compression surface 57 in which a portion of the outer periphery has a flat shape. The fixing surface 56 is arranged at a rear end of the pin 53 in the first direction D1. The outer end 29 of the hairspring 23 is fixed to the fixing surface 56. The compression surface 57 is arranged in front of the fixing surface 56 in the first direction D1.
    The eyebolt 54 is supported by the eyebolt support 37. The eyebolt 54 has a cylindrical shape centered on the first axis O. A shoulder extending along the peripheral direction of the outer periphery is provided at the outer periphery of the eyebolt holder 54. The gripping portion 46 and the eyebolt arm 47 are inserted into the shoulder. Therefore, the eyebolt 54 is sandwiched between the grip portion 46 and the eyebolt arm 47. The eyebolt 53 is inserted at the inner periphery of the eyebolt 54. Therefore, the eyebolt 53 is held. so as to be movable in the first direction D1 relative to the eyebolt 54.
    The eyebolt 54 is kept movable in rotation in a second direction D2 (see Figure 3) about the first axis O relative to the eyebolt support 37 in a state where it is sandwiched by the eyebolt support 37. Consequently, the eyebolt 53 held by the eyebolt support 37 is moved in the first direction D1 relative to the eyebolt carrier 54, and can be driven in rotation in the second direction D2 with the eyebolt carrier 54.
    As shown in Figure 4, a groove 58, into which a tool such as a flat screwdriver can be inserted, is formed on a front end of the eyebolt 54 in the axial direction. The groove 58 is hollowed out from the front to the rear. The groove 58 follows a straight line crossing the first axis O seen in the axial direction. By inserting the tool into the groove 58 and by rotating the tool, the eyebolt 54 is rotated in the second direction D2.
    As shown in Figure 5, a threaded hole 59 is formed at the outer periphery of the eyebolt holder 54. The threaded hole 59 is formed along the radial direction of the first axis O. The threaded hole 59 communicates with the inner periphery and the outer periphery of the eyebolt holder 54. A female screw is formed at the inner periphery of the threaded hole 59.
    The eyebolt 55 is inserted into the threaded hole 59 of the eyebolt holder 54. The eyebolt 55 is screwed into the threaded hole 59 so as to be movable along the radial direction of the first axis O. end 55a located on the side of the first axis O of the eyebolt 55 abuts against the compression surface 57 formed on the eyebolt 53. The eyebolt 55 abuts against the compression surface 57 of the eyebolt 53 to control the pressure. movement of the eyebolt 53 relative to the eyebolt 54 in the first direction D1.
    More specifically, when the eyebolt 55 is rotated in a fixing direction and the end 55a abuts against the compression surface 57 of the eyebolt 53, the eyebolt 53 is kept compressed against the eyebolt holder 54. Consequently, any relative movement between the eyebolt 54 and the eyebolt 53 is prevented. In this state, when the eyebolt carrier 54 is rotated in the second direction D2 relative to the eyebolt support 37, the eyebolt 53 is rotated in the second direction D2 with the eyebolt carrier 54. On the other hand side, when the eyebolt 55 is rotated in the direction of release and the end 55a, and is dissociated from the compression surface 57 of the eyebolt 53, the eyebolt 53 is again movable relative to the eyebolt holder 54 according to the first direction D1.
    (Functioning and beneficial technical effects)
    In what follows, the operation and beneficial technical effects of the balance spring adjustment mechanism 7, the balance bridge unit 4, the movement 2 and the timepiece 1 described above will be described.
    According to the hairspring adjustment mechanism 7 of the present embodiment, the eyebolt 53 is adjustable along the first direction D1 and the second direction D2 of the hairspring 23. Therefore, the outer end 29 of the hairspring 23 held by the pin 53 can be rotated in the second direction D2 and moved along the first direction D1. Consequently, the pin 53 can be moved in at least two directions chosen from the first direction D1 and the second direction D2, and the position of the hairspring 23 can thus be adjusted.
    [0071] Therefore, the hairspring adjustment mechanism 7 capable of easily adjusting the eyebolt 53 in a desired direction.
    Furthermore, this makes it possible to align the eyelet 53 independently of any particular skill or a particular skill level of an operator compared to the solutions of the prior art, so that the maneuverability at manufacturing time can be facilitated, and the product quality can be kept in a stable and good condition.
    The eyebolt support 37 rotatably supports the eyebolt carrier 54, and the eyebolt carrier 54 maintains the eyebolt 53 movably in the first direction D1. Furthermore, the eyebolt 55 (the eyebolt fixing element in the claims) prevents any movement of the eyebolt 53 in the first direction D1 relative to the eyebolt 54. Therefore, when the eyebolt 54 is driven rotating in a state where the movement of the eyebolt 53 is prevented by the eyebolt 55, the eyebolt 53 is rotated integrally with the eyebolt 54 relative to the eyebolt support 37. Therefore, the eyebolt 53 is rotated integrally with the eyebolt 54 relative to the eyebolt support 37. eyebolt 53 can be moved in the first direction D1 and in the second direction D2 independently of each other with respect to the eyebolt support 37.
    Since the eyebolt 53 is rotatably supported by the eyebolt support 37 via the eyebolt 54, the eyebolt 53 can be moved independently in the first direction D1 and the second direction D2. So, for example, compared to the case where the eyebolt 53 is directly attached to the eyebolt support 37 and the eyebolt 53 is moved freely in the first direction D1 and the second direction D2 relative to the eyebolt support 37, the eyebolt support 37 can then only be moved in one setting direction. Therefore, by performing adjustment in the first direction D1 and in the second direction D2 independently of each other, the adjustment in each direction can be made more easily, and therefore the handling can be improved.
    The eyebolt carrier 54 is kept movable in rotation in the second direction D2 relative to the eyebolt support 37 connected to the balance bridge 6. Consequently, the eyebolt 53 can be mounted so as to be able to rotate on the eyebolt support 37 via the eyebolt holder 54. Therefore, it is possible to provide a hairspring adjusting mechanism 7 capable of moving the eyebolt 53 in the first direction D1 and in the second direction D2 in a simple configuration.
    In the present embodiment, the eyebolt 55 is used as the eyebolt fixing element. Therefore, when the eyebolt 54 is rotated in a state where the eyebolt 55 is attached, the eyebolt 53 is rotated integrally with the eyebolt 54 relative to the eyebolt 37 Consequently, the eyebolt 53 can be moved in the first direction D1 and in the second direction D2 independently of each other with respect to the eyebolt support 37. Furthermore, the eyebolt 55 is fixed to the carrier. piton 54. Thus, by fixing the piton screw 55, any relative movement between the piton holder 54 and the piton 53 can be prevented. Therefore, it is possible to provide a hairspring adjustment mechanism 7 capable of fixing the eyebolt 53 in a simple configuration.
    Since the eyebolt 53 has a compression surface 57 against which the eyebolt 55 rests, the eyebolt 53 and the eyebolt 55 are easily brought into abutment against one another. In addition, compared to the case where the eyebolt 53 does not have a compression surface 57, it is possible to prevent the eyebolt 53 from rotating relative to the eyebolt 54 when the eyebolt 55 is attached. Therefore, in particular, when it is desired to move the peg 53 only in the first direction D1, any unwanted rotation of the peg 53 can be prevented. In addition, the eyebolt 53 is rotated with the eyebolt 54 in a state where the eyebolt 55 abuts against the compression surface 57. Therefore, in particular, it is possible to prevent the eyebolt 53 to move involuntarily in the first direction D1 when it is desired to move the pin 53 only in the direction of rotation (second direction D2). Therefore, it is possible to move the peg 53 in each of the first direction D1 and second direction D2 independently of each other, and the maneuverability can be improved.
    The outer end 29 of the hairspring 23 is arranged in a different position vis-à-vis the main body of the hairspring 30 in the first direction D1 (axial direction). Therefore, it is possible to apply a so-called hairspring in which the position of the outer end 29 is different from the hairspring main body 30. Therefore, the versatility of the adjustment mechanism hairspring 7 can be improved.
    According to the balance bridge unit 4 of the present embodiment, since the hairspring adjustment mechanism 7 is provided, the eyebolt 53 can be moved along the first direction D1 and the second direction D2 of the hairspring. 23.
    [0080] Therefore, it is possible to provide a balance bridge unit 4 including the hairspring adjusting mechanism 7 capable of easily adjusting the eyebolt 53 in a desired direction and having improved operating accuracy.
    The balance 22 is equipped with the balance screw 27. Consequently, it is possible to apply a so-called free spring method according to which the moment of inertia of the balance 22 can be adjusted by an amount of fixing (a amount of projection in the radial direction with respect to the balance 22) of the balance screw 27. Therefore, according to a free spring method without using, for example, a regulator, it is possible to obtain a bridge unit balance wheel 4 capable of precisely regulating any deviation in terms of isochronism.
    [0082] According to the movement 2 of the present embodiment, the high performance movement 2 including the balance bridge unit 4 having a hairspring adjustment mechanism 7 capable of easily adjusting the eyebolt 53 in the desired direction can thus to be obtained.
    According to the timepiece 1 of the present embodiment, the timepiece 1 includes the movement 2 and the movement 2 includes the hairspring adjustment mechanism 7. Therefore, by moving the pin 53 according to the first direction D1 and the second direction D2 of the balance spring 23, it is possible to regulate any deviation in terms of isochronism.
    [0084] Therefore, it is possible to provide a timepiece 1 which includes the hairspring adjusting mechanism 7 capable of easily adjusting the pin 53 in each of the first direction D1 and second direction D2 and which is capable of regulating easily any deviation in isochronism.
    (Second embodiment)
    In what follows, a second embodiment of the invention will be described. Fig. 6 is a perspective view of the balance bridge unit 4 according to the second embodiment. Fig. 7 is a plan view of the balance bridge unit 4 according to the second embodiment seen from the front. Fig. 8 is a plan view of the balance bridge unit 4 in which a guide plate cover 261 of Fig. 7 is not shown. Fig. 9 is a sectional view taken along the line IX-IX visible in Fig. 7. Fig. 10 is a sectional view taken along the line XX of Fig. 7. The second embodiment differs from first embodiment in that the pin 53 is movable in a third direction D3 along a radial direction of the central axis C in addition to the first direction D1 and the second direction D2. Furthermore, in this second embodiment, the balance 22 does not have a balance screw 27 (see FIG. 4).
    As illustrated in Figures 6 and 7, the hairspring adjustment mechanism 7 according to the second embodiment includes a hairspring 223, the eyebolt 53, the eyebolt holder 54, a guide plate 260, the plate cover guide 261, and a cover screw 262 (adjusting element in the claims). The configurations of the stud 53 and of the stud holder 54 according to the second embodiment are identical to those of the stud 53 and of the stud holder 54 according to the first embodiment described above. Therefore, in the second embodiment, only the differences from the first embodiment will be described, and a detailed description of items configured identically to those in the first embodiment will be omitted.
    In the second embodiment, the outer end 29 of the hairspring 223 is arranged in the same position in the axial direction as the main body of the hairspring 30. The outer end 29 of the hairspring 223 is an arcuate portion 263 which is curved outward in the radial direction.
    The eyebolt holder 54 is connected to the eyebolt support 37 via the guide plate 260 which will be described later (see FIG. 10).
    As shown in Figures 6 and 8, the eyebolt support 37 according to the second embodiment includes eyebolt arms 247 which extend outwardly first in the radial direction from the gripping portion. 46, and then separate in the peripheral direction. The eyebolt support 37 has a U-shaped groove 250 which opens outwardly in the radial direction when viewed from the axial direction of the eyebolt arm 247. As shown in Fig. 8, each of the eyebolts eyebolt 247 has a fixing hole 264. The fixing hole 264 is a circular hole passing through the corresponding eyebolt 247 in the axial direction. A female thread is formed on an inner periphery of the mounting hole 264.
    As shown in Figures 8 and 9, the guide plate 260 is arranged so as to be superimposed on the pin arm 247 of the pin support 37 at the front thereof. The guide plate 260 has an elliptical shape which is elongated in the peripheral direction when viewed from the axial direction. The guide plate 260 includes a support cavity 265 and oblong holes 266.
    The support cavity 265 is arranged at one end of the guide plate 260 oriented outwardly in the radial direction. The support cavity 265 is hollowed out from the outside to the inside in the radial direction. The support cavity 265 is arranged in a position corresponding to the U-shaped groove 250 of the eyebolt support 37 when the latter is viewed in the axial direction. The support cavity 265 supports the eyebolt holder 54 in a rotatable manner in the second direction D2 (see FIG. 7).
    As illustrated in Figure 8, a pair of oblong holes 266 is provided on both sides in the peripheral direction, the support cavity 265 being interposed between each of the two. Each oblong hole 266 passes through the guide plate 260 in the axial direction. The oblong hole 266 is arranged in a position corresponding to the fixing hole 264 of the eyebolt support 37 seen in the axial direction. The pair of oblong holes 266 is formed in the third direction D3 along a straight line L connecting the central axis C and the first axis O taken as a longitudinal direction seen from the axial direction.
    As illustrated in Figure 9, the guide plate cover 261 is arranged to overlap with the guide plate 260 on the side opposite to the eyebolt support 37. In other words, the guide plate 260 is sandwiched on both sides in the axial direction by the eyebolt 37 and the guide plate cover 261. As shown in Fig. 7, the outer shape of the guide plate cover 261, viewed from the axial direction is the same as the external shape of the guide plate 260 seen in the axial direction. The guide plate cover 261 has through holes 267 arranged in positions corresponding to the fixing holes 264 of the eyebolt support 37 viewed in the axial direction. The through hole 267 passes through the guide plate cover 261 in the axial direction.
    As illustrated in Figure 9, the cover screw 262 is inserted into the fixing hole 264, the elongated hole 266 and the through hole 267 in a state where the eyebolt support 37, the guide plate 260 and the guide plate cover 261 overlap each other. The cover screw 262 adjusts the distance between the eyebolt 37 and the guide plate cover 261. More specifically, the cover screw 262 is inserted from the side of the guide plate cover 261 (front side) and is secured. to a female thread (form of a female screw) provided in the eyebolt support 37. Therefore, the cover screw 262 secures the eyebolt support 37, the guide plate 260 and the guide plate cover 261 together.
    In the hairspring adjustment mechanism 7 arranged in this way, when the cover screw 262 is released, the guide plate 260 is movable in the third direction D3, which is the longitudinal direction of the oblong hole 266, relative to to the eyebolt support 37 and to the guide plate cover 261. When the guide plate 260 is moved in the third direction D3, the eyebolt 53 is moved in the third direction D3 while the eyebolt holder 54 is connected to the plate guide 260.
    [0096] After the guide plate 260 has been moved to a desired position in the third direction D3, when the cover screw 262 rotates in the fixing direction, the guide plate cover 261 is moved to the side of the holder. eyebolt 37 by an axial force of the cover screw 262. Therefore, the guide plate 260 is compressed on both sides in the axial direction by the eyebolt support 37 and the guide plate cover 261, and any movement according to the third direction D3 is prevented.
    Here, in the second embodiment, in addition to the balance spring adjustment mechanism 7, the shape of the balance bridge 6 is different from that of the first embodiment described above. More specifically, according to the second embodiment, the fixing base 35 of the balance bridge 6 extends in a direction away from the central axis C seen from the axial direction. The fixing base 35 has the shape of an arc curved in the peripheral direction from the central axis C, and oriented radially outwards.
    According to the second embodiment, the guide plate 260 maintains the eyebolt 54 movable in rotation and is moved in the third direction D3 along the longitudinal direction of the oblong hole 266 in a state where it is taken in. sandwich between the eyebolt 37 and the guide plate cover 261. The cover screw 262 is used as an adjusting member capable of adjusting the distance between the eyebolt 37 and the guide plate cover 261. When the guide plate 260 is moved in the third direction D3, the eyebolt 54 and the eyebolt 53 are moved in the third direction D3 integrally with the guide plate 260. Therefore, the eyebolt 53 can be moved in three directions. directions selected from the first direction D1, the second direction D2 and the third direction D3 with respect to the stud support 37. Therefore, an additional degree of freedom can be obtained for the adjustment of the stud 53.
    The cover screw 262 (adjustment element in the claims) sandwiches the guide plate 260 between the guide plate cover 261 and the eyebolt support 37 by adjusting the distance so that the eyebolt support 37 and the guide plate cover 261 are close to each other. More specifically, the cover screw 262 compresses the guide plate cover of the eyebolt support side while attached thereto, and sandwiches the guide plate between the guide plate cover and the eyebolt support. The cover screw 262 is inserted into the oblong hole 266 of the guide plate 260. Therefore, the movement of the guide plate 260 in the third direction D3 can be prevented by fixing the cover screw 262. In addition, the movement of the guide plate 260 in the third direction D3 can be prevented by fixing the cover screw 262. Further, guide plate 260 can be moved along the third direction D3 while the slot 266 is aligned with the cover screw 262 by adjusting the distance between the eyebolt 37 and the guide plate cover 261 so as to separate eyebolt support 37 and guide plate cover 261, that is, by releasing the fixing of the cover screw 262.
    (Third embodiment)
    [0100] In what follows, a third embodiment of the invention will be described. Fig. 11 is a plan view of the balance bridge unit 4 according to a third embodiment seen from the front. Fig. 12 is a sectional view taken along the line XII-XII visible in Fig. 11. The third embodiment is different from the first embodiment in that the balance bridge unit 4 includes a regulator 371 .
    As illustrated in Figures 11 and 12, in the third embodiment, the outer end 29 of the hairspring 323 is disposed in the same position in the axial direction as the main body of the hairspring 30. The outer end 29 of the hairspring 323 is an arcuate portion 363 which is convex outwardly in the radial direction.
    [0102] The balance bridge unit 4 according to the third embodiment includes a movement fine adjustment lever 370 and a regulator 371.
    [0103] The fine movement adjustment lever 370 is rotatably mounted in the chaton 43 (see FIG. 12) around the central axis C. The fine movement adjustment lever 370 includes a fixing part 372 fixed to the chaton 43, and an engaging fork 373 which extends outwardly in the radial direction from the attachment portion 372 and has a forked shape branching off in the peripheral direction. An adjustment pin 374 is disposed within the engagement yoke 373. As shown in Figure 12, the adjustment pin 374 is rotatably mounted within a bearing shell 375 provided in the housing. balance bridge 6. The adjustment pin 374 includes a shaft 376 arranged coaxially with a plug 375, and a head 377 integrally formed with the forward end of the shaft 376 and eccentric with respect to the shaft. 376. The head 377 is in sliding contact with an inner surface of the engagement fork 373. Therefore, by rotating the adjustment pin 374 relative to the plug 375, the entire movement fine adjustment lever 370 can be adjusted. driven in rotation around the central axis C of the sprung balance 5.
    [0104] As shown in FIG. 11, the regulator 371 comprises a regulator body 378, a regulator pin 379 and a stud 380.
    [0105] The regulator body 378 is rotatably mounted around the central axis C. The regulator body 378 includes a base 381 which surrounds the fixing portion 372 of the fine adjustment lever of the movement 370 via the exterior according to the direction. radial, and a regulator arm 382 extending outwardly in the radial direction from base 381.
    [0106] The regulator pin 379 and the eyebolt 380 are fixed to the regulator arm 382. The regulator pin 379 and the eyebolt 380 are disposed so as to face each other in the radial direction, with the arcuate portion 363 of the hairspring 323 interposed between them. More specifically, the governor pin 379 is located within the arcuate portion 363 in the radial direction. The peak 380 is located outside the arcuate portion 363 in the radial direction. A rear end of regulator pin 379 and eyebolt 380 protrudes downward from arcuate portion 363 of hairspring 323. The distance between regulator pin 379 and eyebolt 380 is adjustable. Therefore, the oscillation amplitude of the hairspring 323 can be adjusted.
    [0107] In the third embodiment, the eyebolt support 37 includes the gripping part 46 (see figure 3) provided on the outside of the cylindrical bearing 40 (see figure 5), and a shaped eyebolt arm. fork 347 which first extends outwardly in the radial direction from the gripping portion 46, and then branches off in the peripheral direction. The hairspring adjustment mechanism 7 is kept movable in rotation with respect to the eyebolt arm 347 between the fork-shaped eyebolt arms 347. Since the architecture of the hairspring adjustment mechanism 7 according to the third embodiment is the same than that of the hairspring adjustment mechanism 7 according to the first embodiment, its detailed description will not be repeated in detail below.
    [0108] According to the third embodiment, the hairspring adjustment mechanism 7 can be applied to a balance wheel unit 4 comprising a regulator 371. Therefore, in addition to being able to perform the same actions and obtain the results. same effects as those of the first embodiment described above, a degree of freedom for adjustment and precision of the adjustment can be further improved by adjusting the regulator 371.
    The technical scope of the invention is not limited to the embodiments described above, and various variants can be envisaged without departing from the spirit of the invention.
    [0110] For example, in the embodiment described above, the eyebolt 55 is used as a fixing element for the eyebolt so as to control the movement of the eyebolt 53 in the first direction D1 relative to the eyebolt holder 54 , but the invention is not limited to such a configuration. For example, the movement of the eyebolt 53 in the first direction D1 could be fixed by inserting a pin in place of the eyebolt 55.
    [0111] Similarly, although the cover screw 262 is used as an adjustment element in the second embodiment, an element other than the screw could be used to adjust the distance between the eyebolt 37 and the cover. guide plate 261.
    The shape of the eyebolt support 37 for keeping the eyebolt 54 movable in rotation is not limited to that described above. For example, an annular hole passing through the eyebolt arm 47 in the axial direction could be provided, and the eyebolt holder 54 could be inserted inside this hole.
    The shape of the fixing base 35 of the balance bridge 6 is not limited to the shape of the first, second and third embodiments described above.
    [0114] In addition, it is possible to suitably replace components of the embodiments described above with known components without departing from the spirit of the invention defined by the claims, and the modifications mentioned above. above could be combined as needed.
    权利要求:
    Claims (12)
    [1]
    1. Balance-spring adjustment mechanism (7), comprising:a spiral (23) configured as a spiral; anda stud (53) which is connected to an outer end (29) of the hairspring (23), is movable in a first direction (D1) along a first axis (O) parallel to a central axis (C) of the hairspring (23), and is rotatable in a second direction (D2) around the first axis (O).
    [2]
    2. A hairspring adjustment mechanism (7) according to claim 1, further comprising:a piton support (37) which is connected to a balance bridge (6);a stud holder (54) for keeping the stud (53) mobile in the first direction (D1) and which is mounted to rotate in the second direction (D2); andan eyebolt fixing element which is configured to prevent movement of the eyebolt (53) in the first direction (D1) relative to the eyebolt support (37) by abutting against the eyebolt (53).
    [3]
    3. A hairspring adjustment mechanism (7) according to claim 2, whereinthe eyebolt support (37) keeps the eyebolt support (37) movable in rotation in the second direction (D2).
    [4]
    4. A hairspring adjustment mechanism (7) according to claim 2, further comprising:a guide plate (260) which is arranged so as to overlap with the eyebolt support (37), and which is configured to keep the eyebolt support (37) movable in rotation in the second direction (D2);a guide plate cover (261) which is arranged to overlap with the guide plate (260) on the side opposite to the eyebolt support (37); andan adjustment element which is configured to adjust the distance between the eyebolt support (37) and the guide plate cover (261),the guide plate (261) being fixed to the adjustment member and having an oblong hole (266) which is elongated in a third direction (D3) along a straight line connecting the central axis to the first axis (O ) when the latter is viewed in the axial direction of the central axis (C).
    [5]
    5. A hairspring adjustment mechanism (7) according to claim 4, whereinthe adjustment element is a cover screw (262) which is fixed to the eyebolt support (37) and presses the guide plate cover (261) against the eyebolt support (37), andthe cover screw (262) is inserted into the oblong hole (266).
    [6]
    6. Spiral adjustment mechanism (7) according to one of claims 2 to 5, whereinthe eyebolt fixing element (53) is a eyebolt screw (55) attached to the eyebolt holder (54).
    [7]
    7. A hairspring adjustment mechanism (7) according to claim 6, whereinthe eyebolt (53) has a compression surface (57) which abuts against the eyebolt (55), and is capable of being rotated in the second direction (D2) with the eyebolt support (37) when the eyebolt (55) is in abutment against the compression surface (57).
    [8]
    8. Spiral adjustment mechanism (7) according to one of claims 1 to 7, whereinthe outer end (29) of the spiral (23) is arranged in a different position, in the first direction (D1), with respect to the main body of the spiral (30) having a spiral shape.
    [9]
    9. Balance bridge unit (4), comprising:the hairspring adjustment mechanism (23) according to one of claims 1 to 8.
    [10]
    10. A balance bridge unit (4) according to claim 9, further comprising:a sprung balance (5) to which the hairspring (23) is fixed, in whichthe sprung balance (5) includes:an annular balance wheel (22); anda balance screw (27) fixed to the balance wheel (2).
    [11]
    11. Movement (2), comprising:the balance bridge unit (4) according to claim 9 or 10.
    [12]
    12. Timepiece (1), comprising:the movement (2) according to claim 11.
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    同族专利:
    公开号 | 公开日
    JP2021117184A|2021-08-10|
    CN113267985A|2021-08-17|
    JP6703203B1|2020-06-03|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    JP2020012473A|JP6703203B1|2020-01-29|2020-01-29|Hairspring adjustment mechanism, balance reception unit, movement and clock|
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