• 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:
    To return an indication part 40 to an initial position by means of a continuous movement of the hand while controlling the reset speed, the invention relates to a display mechanism for a timepiece 24 comprising a part 40 configured to rotate using an initial position as a reference. A display part 14 is provided for showing time information on the basis of the rotation of the indication part. A reset portion 41 is configured to return the indication portion to the initial position based on a command to stop displaying the time information. A rotational braking portion 42 is configured to brake the rotational speed of the indication portion until the indication portion is returned to the initial position.
    公开号:CH709362B1
    申请号:CH00279/15
    申请日:2015-03-03
    公开日:2020-02-28
    发明作者:Suzuki Shigeo；Jujo Koichiro
    申请人:Seiko Instr Inc；
    IPC主号:
    专利说明:

    Description
    Context of the invention
    1. Field of the invention The present invention relates to a display mechanism for a timepiece, a timepiece movement and a timepiece.
    2. Description of the state of the art [0002] In a conventional manner, a large number of timepieces are known which are equipped with a chronograph mechanism (for example, see Japanese Patent No. 5,341,494 ( Patent literature 1)). In the chronograph mechanism, the reset structure for returning the chronograph hand to the initial position (zero position) is generally, according to a general classification, a mechanical reset system in which the reset is carried out. by striking a heart, or a motorized reset system in which reset is effected by intermittent movement of the needle using the rotational force of a motor.
    In the case of the mechanical reset system, the reset is carried out by striking a forced heart on a chronograph shaft on which the chronograph hand is mounted, so that it is possible to rotate the chronograph hand at high speed, which advantageously makes it possible to reset instantly.
    However, due to the instant reset, an excessive load (impact force) is likely to act on the chronograph hand at the start of the reset, so that it the chronograph hand may be distorted. Thus, it is necessary to design the chronograph hand taking the load into account, which results in constraints in terms of size and configuration of the chronograph hand.
    In addition, an excessive load is also exerted on the portion fixed between the chronograph hand and the chronograph shaft, so that the chronograph hand is subject to play. Thus, to prevent this play, it is necessary, for example, to strengthen the fixing torque by forming the portion of the chronograph shaft in which the chronograph hand is forced into a special configuration, for example, a rectangular configuration in transverse view, which results in a constraint.
    On the other hand, in the case of the motorized reset system, the chronograph hand is brought back to zero using the rotation of a motor, so that, in comparison with the mechanical reset system zero, the reset speed is rather low, making it difficult to resume the operation of the chronograph without difficulty. In addition, the chronograph hand is brought to zero by intermittent movement of the hand, resulting in a rather poor external appearance, so there is room for improvement. In addition, in some cases, the reset speed differs between the normal rotation and the reverse rotation of the motor, which also means room for improvement.
    Summary of the Invention The present invention has been made in order to solve the above problems; consequently, an object of the present invention is to provide a display mechanism for a timepiece capable of bringing the indication part back to the initial position by means of a continuous movement of the hand while controlling the speed of reset, and a timepiece movement and a timepiece, equipped therewith.
    (1) According to the present invention, there is provided a display mechanism for a timepiece comprising an indication part configured to rotate using an initial position as a reference; a display part showing time information based on the rotation of the indication part; a reset portion configured to return the indication portion to the initial position based on a command to stop displaying the time information; and a rotational braking portion configured to brake the rotational speed of the indication portion until the indication portion is returned to the initial position.
    In the display mechanism for the above timepiece, the display part shows time information on the basis of the rotation of the rotating indication part using the initial position as a reference, so that 'It is possible, for example, to perform a time measurement with precision. And, when an instruction to stop displaying the time information is issued to stop the time measurement, the reset portion returns the indication portion to the initial position (reset). Therefore, it is possible to return the positions of the indication part and the display part to the previous positions, making the timepiece ready for the next time measurement.
    While the indication part is brought back to the initial position by the reset part, the rotation braking part brakes the speed of rotation of the indication part. Therefore, it is possible to control the reset speed of the indication part, allowing the indication part to be brought back by means of a continuous movement of the needle to a desired reset speed instead of instantly bring it back to the original position.
    CH 709 362 B1 [0011] Thus, it is possible to prevent an excessive load being exerted on the indication part and the display part, making it possible to eliminate the design constraints taking into account the load. In addition, it is possible to return the indication part and the display part by means of a continuous movement of the needle to a desired reset speed, so that it is possible to quickly return the piece d '' clock ready for the next time display (time measurement); and, at the same time, it is possible to improve the external appearance of the movement of the indication part and of the display part at the time of resetting, which makes it possible to obtain an improvement in design. .
    (2) The reset part can be equipped with: a first rotary member configured to rotate with the rotation of the indication part; of a heart which rotates with the rotation of the indication part in the absence of the stop command and which is forced into rotation on the basis of the stop command so as to be placed in position at a prescribed position with respect to the initial position; and of an elastic member which undergoes an elastic deformation with the forced rotation of the heart and which, by resuming a shape prior to the elastic deformation, rotates the first rotary member in accordance with the forced rotation of the heart to bring back the indication part to the initial position.
    In this case, when the indication part rotates by means of the initial position as a reference, the first rotary member and the heart rotate in a single piece with the indication part. Here, in the event that the instruction to complete the display of time information is produced, the heart is forcibly turned, for example, by being struck to be placed in the prescribed position. At this time, the elastic organ undergoes elastic deformation with the forced rotation of the heart, so that it is possible to rotate the heart in priority. And, when the heart is placed in the prescribed position, the elastic organ undergoes a recovery in shape, and causes the first rotary organ to rotate with a delay in accordance with the forced rotation of the heart. Therefore, it is possible to return the indication part and the display part to their previous positions.
    In this way, the heart is first forcibly turned, then the indication part is brought to zero using the resumption of shape of the elastic member, so that it is possible to execute a reset to zero by means of a more regular continuous movement of the needle.
    (3) The elastic member can be a spiral spring which is armed so as to present an initial elastic force, the outer end of which is connected to the first rotary member, and the inner end of which is connected to the heart. or a drive train connected to the heart.
    In this case, it is possible to use the bending deformation of the spiral spring, so that it is possible to bring the indication part precisely to zero for a long period of time, thereby achieving an improvement in reliability.
    (4) The spiral spring can be a first spiral spring, the resetting part then comprising a second spiral spring which undergoes elastic deformation with the forced rotation of the heart and which, taking up an earlier shape at elastic deformation, rotates the first rotary member (50) in accordance with the forced rotation of the heart to return the indication part to the initial position, the second spiral spring being armed in a direction opposite to the first spiral spring.
    In this case, we use the first spiral spring and the second spiral spring armed in opposite directions, so that, at the time of resumption of shape, it is possible to elastically deform a spiral spring so to reduce its diameter, and to elastically deform the other spiral spring so as to increase its diameter. In this way, it is possible to use the first spiral spring and the second spiral spring configured to undergo shape recovery in opposite directions, so that the indication part can be brought to a stop. a more stable and quick way from the initial position; and, in addition, the indication part can be reset to zero more precisely.
    (5) The rotation braking part can be equipped with a second rotary member configured to rotate with the rotation of the indication part, and a resistance body configured to apply a resistance to rotation to the second member rotary.
    In this case, the resistance body communicates a resistance to rotation to the second rotary member to thereby slow down the speed of rotation of the indication part, so that, by adjusting the resistance body, it is possible to control the reset speed of the indication part. Thus, it is possible to easily control the reset speed, to freely design the movement (behavior) of the indication part and the display part at the time of resetting, and to obtain an improvement in terms of of design property.
    (6) The resistance body can apply a resistance to rotation proportional to the angular speed of the second rotary member.
    In this case, the resistance body communicates a resistance to rotation proportional to the angular speed of the second rotary member, so that it is possible, for example, to temporarily increase the reset speed of the part of the indication, then bring it back to the initial position while gradually decelerating it, thus varying the reset speed. Thus, it is possible to communicate a unique change different from that existing in the prior art in the movement of the indication part and the visualization part at the time of delivery.
    CH 709 362 B1 to zero, which provides further improvement in design property and improves added value.
    (7) The timepiece movement according to the present invention is equipped with the display mechanism for the above timepiece.
    In the timepiece movement above, the display mechanism for the timepiece as described above is provided, so that there are no restrictions in terms of design, which provides a quality timepiece movement with higher operating performance.
    (8) The timepiece according to the present invention is equipped with the above timepiece movement.
    The above timepiece is equipped with the timepiece movement as described above, so that it is possible in the same way to provide a timepiece of superior quality in performance Operating. This is, in particular, suitable for a quartz timepiece fitted with a chronograph mechanism.
    According to the present invention, it is possible to return the indication part to the initial position by means of a continuous movement of the needle.
    Brief description of the sketches
    Fig. 1 is a diagram illustrating a first movement of the present invention; it is an external view of a timepiece.
    Fig. 2 is a partial sectional view of the movement shown in FIG. 1.
    Fig. 3 is a plan view illustrating the relationship between a chronograph shaft, a transmission wheel, a heart, a spiral spring, an oil rotor and a hammer, shown in FIG. 2.
    Fig. 4 is a plan view illustrating how, in the state shown in FIG. 3, the heart is placed in a prescribed position using the hammer and how the chronograph shaft is returned to the initial position.
    Fig. 5 is a plan view of a first spiral spring shown in FIG. 2.
    Fig. 6 is a plan view of a second spiral spring shown in FIG. 2.
    Fig. 7 is a plan view illustrating how, in the state shown in FIG. 3, the hammer works to apply an external force to the heart.
    Fig. 8 is a plan view illustrating how, in the state shown in FIG. 7, the heart is placed in the prescribed position using the hammer.
    Fig. 9 is a schematic plan view of a chronograph mechanism according to a second embodiment of the present invention.
    Fig. 10 is a sectional view of the chronograph mechanism taken along the line A-A of FIG. 9.
    Fig. 11 is a schematic plan view of a modification of the chronograph mechanism of the second embodiment.
    Fig. 12 is a sectional view of the chronograph mechanism taken along line B-B of FIG. 11.
    Fig. 13 is a schematic sectional view of a chronograph mechanism according to a third embodiment of the present invention.
    Fig. 14 is a plan view illustrating the relationship between a chronograph shaft, a transmission toothed wheel, a heart, a control lever, a control lever spring, an oil rotor and a hammer in FIG. 13.
    Fig. 15 is a plan view illustrating how, in the state shown in FIG. 14, the heart is placed in the prescribed position using the hammer.
    Fig. 16 is a plan view illustrating how, in the state shown in FIG. 15, the chronograph shaft is returned to the initial position.
    Fig. 17 is a schematic sectional view of a modification of the chronograph mechanism according to the present invention.
    CH 709 362 B1
    Fig. 18 is a plan view illustrating the relationship between the chronograph shaft, the transmission gear wheel, the heart, the control lever, the control lever spring, the rotor, the spiral spring and the hammer, shown on the fig. 17.
    Detailed description of preferred embodiments
    First embodiment In the following, the first embodiment of the present invention will be described with reference to the sketches. In the present embodiment, a quartz type wristwatch (electronic watch) equipped with a chronograph mechanism will be described by way of example.
    Construction of the timepiece In general, the mechanical assembly of the timepiece including its drive part is called the "movement". What is achieved by mounting a dial and hands to this movement and placing the assembly in a timepiece case as a complete product is called the "complete set" of the timepiece. Among the two sides of a main plate constituting the chassis of the timepiece, the side where the crystal of the timepiece case is located (the side where the dial is located) is called the "back side" of the movement. Among both sides of the main stage, the side where the bottom of the timepiece case is located (the side opposite the dial) is called the "front side" of the movement.
    In this embodiment, the direction from the dial to the bottom of the housing will be designated as the upward direction, and the opposite direction will be designated as the downward direction.
    As shown in figs. 1 and 2, the complete assembly of the timepiece 1 of this embodiment is equipped with a dial 11 having a scale or the like indicating information relating at least to time, and a movement 10 (forming the movement timepiece mentioned in the claims) within a timepiece case 3 composed of a case back (not shown) and a crystal 2.
    Between the dial 11 and the crystal 2, there are disposed, as indicator hands for the ordinary display of the hour, an hour hand 12 indicating the hour and a minute hand 13 indicating the minute and, at the same time, a chronograph second hand 14 was arranged for the time measurement. The hour hand 12, the minute hand 13 and the chronograph second hand 14 are arranged coaxially. Furthermore, in the present embodiment, as an indicator hand for ordinary time display, a second hand 15 is arranged, for example, at the 3 o'clock position of the dial 11.
    The 15 second hand, however, is not essential; it may or may not be planned; where provided, its location is not limited to the 3 o'clock position; its location can be freely chosen. In addition, not only the chronograph second hand 14, but also a chronograph minute hand and a chronograph hour hand for time measurement can be provided.
    Structure of the timepiece movement As shown in FIG. 2, the movement 10 is equipped with a main plate 20, a gear train bridge 21 arranged on the front face of the main plate 20 and a chronograph bridge 22 placed on the front face of the gear train bridge 21.
    On the rear face of the main plate 20, the dial 11 has been arranged so as to be visible through the glass 2. On the front face of the main plate 20, there is at least one battery (not shown) ), a drive train mechanism 23 for the ordinary time display, a chronograph mechanism for performing a time measurement 24 (forming the display mechanism for a timepiece mentioned in the claims), a first stepper motor 25 shown in fig. 1 for operating the drive train mechanism 23, and a second stepping motor 26 shown in FIG. 1 to operate the chronograph mechanism 24.
    As shown in fig. 1, the first stepping motor 25 is equipped with a winding block 25a comprising a winding wire wound around a magnetic core, a stator 25b arranged so as to be in contact with both the end portions of the magnetic core of the winding block 25a, and of a rotor 25c in which a rotor magnet is incorporated. The rotor 25c is disposed in a rotor hole formed in the stator 25b, and they are arranged so as to be able to rotate respectively with respect to the main plate 20 and to the gear train 21.
    In addition, on the front face of the main plate 20, there is a circuit board (not shown) electrically continuous with the battery. Mounted on this circuit board, there is a quartz unit (not shown) containing a quartz oscillator oscillating at a predetermined frequency, and an integrated circuit (C1) (not shown).
    The integrated circuit consists, for example, of a C-MOS or PLA, and contains an oscillating part (oscillator) producing a reference signal on the basis of the oscillation of the quartz oscillator, a part of division (divider) configured to divide the reference signal of this oscillating part, and a drive part (pilot) configured
    CH 709 362 B1 to produce a motor drive signal based on the output of the division part. And, the first stepper motor 25 is driven based on the motor drive signal produced by the drive part.
    Like the first stepping motor 25, the second stepping motor 26 is equipped with a winding block 26a, a stator 26b and a rotor 26c. The rotor 26c of the second stepping motor 26 is controlled by a chronograph drive part (not shown) operating on the basis of the operation of a chronograph start / stop button 27. When the start / stop button stop 27 is pressed to operate the chronograph, the chronograph drive portion produces a motor drive signal to the rotor 26c of the second stepper motor 26; and when the start / stop button 27 is pressed again to stop the chronograph, the output of the motor drive signal is stopped. Consequently, the rotor 26c of the second stepping motor 26 rotates only when the chronograph is operating.
    In the example shown, the start / stop button 27 is mounted on the timepiece housing 3 so as to be disposed at the 2 o'clock position of the dial 11. However, this should not be interpreted restrictively; the position of the start / stop button 27 can be freely defined.
    In addition, a reset button 28 for resetting the chronograph is mounted on the timepiece case 3 so as to be arranged, for example, at the 4 o'clock position of the dial 11. By pressing this button reset 28, it is possible to issue an instruction to complete the display of the time information, and it is possible to return a chronograph shaft 40 described below to an initial position P1 (reset). The initial position P1 is a position where the chronograph second hand 14 indicates 12 hours (see fig. 1 and 4).
    As shown in fig. 2, on the front face of the main plate 20, there is arranged a fifth mobile (not shown) configured to rotate on the basis of the rotation of the rotor 25c of the first stepping motor 25, a second mobile (not shown) ) configured to rotate on the basis of the rotation of the fifth mobile, a third mobile (not shown) configured to rotate on the basis of the rotation of the second mobile, a center mobile 30 configured to rotate on the basis of the rotation of the third movable, a minute wheel (not shown) configured to rotate based on the rotation of the center mobile 30, and an hour wheel 31 configured to rotate based on the rotation of the minute wheel. These wheels represent the aforementioned drive train mechanism 23 on the front face.
    The fifth mobile, the second mobile, and the third mobile are all rotatably supported relative to the main plate 20 and the gear train 21. A lower pivot portion of the shaft of the second mobile protrudes towards the side of the glass 2 beyond the dial 11, and the second hand 15 shown in FIG. 1 is mounted on this projecting portion.
    The center mobile 30 is formed in a tubular configuration, is arranged coaxially with the axis O1 of the chronograph shaft 40 described below, and is rotatably supported by a cylindrical portion 32 formed of monobloc to the main plate 20. More specifically, a part of the center mobile 30 is disposed inside the cylindrical portion 32, and the upper end side of the latter is rotatably placed on the end of upper opening of the cylindrical portion 32. Consequently, the center mobile 30 is capable of stable rotation.
    In the example shown, the center mobile 30 is engaged with the third mobile (not shown) via a first relay wheel 33 and a second relay wheel 34. In addition, the mobile center 30 is formed so as to rotate one hour, and the minute hand 13 is mounted on the lower end thereof. In this sense, the minute wheel 13 is located on the side of the dial 11 of the chronograph second hand 14 mounted on the chronograph shaft 40.
    The hour wheel 31 is arranged coaxially with the axis O1 of the chronograph shaft 40, and is equipped with a main tube body 31a rotatably mounted on the cylindrical portion 32, and a wheel tube tooth 31b connected integrally to the main tube body 31a and meshing with the minute wheel (not shown). However, it is not necessary that the main tube body 31a and the tube gear 31b be formed as independent components; they can also be formed in one piece.
    The hour wheel 31 is formed so as to rotate every 12 hours, and the hour hand 12 is mounted on the lower end of the main tube body 31a. In this case, the hour hand 12 is located on the dial side 11 of the minute hand 13.
    The minute wheel is formed so as to be rotated by means of a clutch wheel or the like (not shown) disposed on the front face of the main plate 20 when it is rotated with a winding stem (not shown) protruding. Consequently, it is possible to rotate the center mobile 30 and the hour wheel 31 by means of the minute wheel, which makes it possible to set the time.
    On the front face of the main plate 20, there is a reset lever (not shown) with a function for resetting the operation of the integrated circuit when the time is adjusted and to bring the third mobile and the center mobile 30 out of engagement with each other. Consequently, in the state in which the winding stem has been pulled out, the third mobile and the mobile 30 are out of engagement with respect to each other, and the second mobile to which the seconds hand 15 is mounted does not rotate. Thus, by performing a rotation with the winding stem which has emerged through a crown shown in FIG. 1, it is possible to
    CH 709 362 B1 turn only the center mobile 30 to which the minute hand 13 is mounted and the hour wheel 31 to which the hour hand 12 is mounted until the correct time.
    The second mobile is in mesh with the rotor 25c of the first stepping motor 25 via the fifth mobile; however, the rotor magnet has a force (index torque) to keep it where it is, so that the second mobile does not rotate.
    Chronograph mechanism [0052] The chronograph mechanism 24 is equipped with a chronograph shaft 40 (forming the indication part mentioned in the definition of the present invention) configured to rotate using the initial position P1 as a reference, a chronograph second hand 14 (forming the display part mentioned in the claims) configured to show a measurement time (sec) which represents the time information based on the rotation of the chronograph shaft 40, of a reset part 41 returning the chronograph shaft 40 to the initial position P1 on the basis of a chronograph reset instruction (instruction to complete the display of the time information), and of a rotation braking part 42 configured to brake the speed of rotation of the chronograph shaft 40 until the chronograph shaft 40 is returned to the posi initial tion P1.
    The chronograph shaft 40 is a shaft rotating around the axis O1 on the basis of the starting chronograph instruction; it has an upper pivot portion 40a at its upper end, and the chronograph second hand 14 is mounted on its lower end. The lower end of the chronograph shaft 40 projects downwards beyond the lower end of the center mobile 30. Thus, the chronograph second hand 14 is disposed closer to the crystal 2 than the minute hand 13.
    In the example shown, the chronograph shaft 40 is formed as a multi-stage tree on which there is continuously provided a first portion of large diameter 40b, a second portion of large diameter 40c, a third large diameter portion 40d, a rim portion 40e, and a fourth large diameter portion 40f in that order from the upper pivot portion 40a to the lower end.
    The first large diameter portion 40b is a larger diameter portion than the upper pivot portion 40a; a transmission toothed wheel 50 described below is fixed to this portion, for example, by force insertion. The second large diameter portion 40c is a larger diameter portion than the first large diameter portion 40b; a heart 51 described below is fitted by tightening with this portion in a rotary manner relative to the chronograph shaft 40. The third large diameter portion 40d is a portion of larger diameter than the second large diameter portion 40c; a chronograph toothed wheel 45 is fitted by tightening with this portion in a rotatable manner relative to the chronograph shaft 40. The flange portion 40e is a portion of diameter even greater than the third portion of large diameter 40d; and the internal edge portion of a chronograph spring 46 is maintained in pressure contact with this portion. The fourth large diameter portion 40f is a portion with a smaller diameter than the rim portion 40e, but a larger diameter than the third large diameter portion 40d.
    The portion of the fourth large diameter portion 40f of the chronograph shaft 40 thus constructed located below the fourth large diameter portion 40f is disposed within the center mobile 30 and, in this state, the fourth large diameter portion 40f is rotatably placed on the upper opening end of the center mobile 30. In addition, the upper pivot portion 40a of the chronograph shaft 40 is rotatably supported by a bearing 22A provided on the chronograph bridge 22. Consequently, the chronograph wheel can rotate around the axis O1 in a stable manner.
    The chronograph toothed wheel 45 has a toothed portion on the entire periphery of its outer edge portion, and is equipped with a main annular toothed wheel body 45a, rotated by the rotational force transmitted from the rotor 26c the second stepping motor 26, and an annular ring 45b fixed to the inner edge portion of the main gear wheel body 45a, for example, by force insertion; the chronograph toothed wheel 45 is rotatably fitted with the third large diameter portion 40d of the chronograph shaft 40 by means of the ring 45b.
    And, the rotational force of this chronograph toothed wheel 45 is transmitted to the chronograph shaft 40 by means of a chronograph spring 46.
    The chronograph spring 46 is a ring-type plate element mounted on the third portion of large diameter 40d; it is arranged under the chronograph gear 45 and is mounted so as to be held between the flange portion 40e of the chronograph shaft 40 and the chronograph gear 45 in the direction of the axis O1.
    This chronograph spring 46 has a plurality of lug portions 46a formed in the radial direction at equal intervals in the peripheral direction (the direction in which it rotates around the axis O1). These multiple leg portions 46a are folded upward as they extend outward in the radial direction (the direction orthogonal to the axis O1), and the outer edge portions thereof are in pressure contact with the lower surface of the main gearwheel body 45a of the chronograph gearwheel 45. In addition, the inner edge portions of the chronograph spring 46 are in pressure contact with the rim portion 40e while surrounding the third portion of large diameter 40d from the outer side in a radial direction.
    CH 709 362 B1 Thus, the chronograph toothed wheel 45 interlocked by rotationally tightening with the third large diameter portion 40d is connected in one piece with the chronograph shaft 40 by means of the chronograph spring 46 ; at the time of operation of the chronograph, the rotational force of the chronograph toothed wheel 45 can be transmitted to the chronograph shaft 40 via the chronograph spring 46. Thus, the chronograph shaft 40 rotates jointly with the chronograph toothed wheel 45 due to the rotational force coming from the rotor 26c of the second stepping motor 26.
    On the other hand, the chronograph toothed wheel 45 is interlocked by rotationally tightening with the third large diameter portion 40d of the chronograph shaft 40, so that it is also possible to turn only the chronograph shaft 40 around the axis O1, the chronograph toothed wheel 45 being stationary. In this process, the chronograph spring 46 rotates about the axis O1 together with the chronograph shaft 40, and the outer edge portion of the lug portion 46a moves by friction on the lower surface of the toothed wheel. chronograph 45 so as to slide on it.
    As described above, the position where the chronograph second hand 14 indicates 12 o'clock is the initial position P1 (see fig. 4) of the chronograph shaft 40, which rotates, at the time of operation of the chronograph, using this initial position P1 as a reference.
    As shown in fig. 2, the above-mentioned reset portion 41 is equipped with a transmission toothed wheel 50 (forming the first rotary member mentioned in the claims) configured to rotate with the rotation of the chronograph shaft 40, a heart 51 which is configured to rotate with the rotation of the chronograph shaft 40, and which is forcibly rotated on the basis of the chronograph reset instruction to be placed in the prescribed position P2 (see fig. 4) and a spiral spring 52 (forming the elastic member mentioned in the claims) which is elastically deformed with the forced rotation of the heart 51 and which, by resumption of shape, rotates the toothed transmission wheel 50 in accordance with the forced rotation of the heart 51 to bring back the chronograph shaft 40 at the initial position P1.
    As described above, the transmission gear 50 is fixed to the first large diameter portion 40b of the chronograph shaft 40 and is arranged coaxially with the axis O1 of the chronograph shaft 40 Thus, the transmission toothed wheel 50 rotates around the axis O1 together with the chronograph shaft 40. A toothed portion 50a is formed at the level of the outer edge portion of the transmission toothed wheel 50 over the entire periphery. of it. In addition, the transmission toothed wheel 50 has an annular transmission wall portion 50b projecting downward and surrounding the second large diameter portion 40c of the chronograph shaft 40 in the radial direction from the outside. This portion of transmission wall 50b projects downwards so as not to be brought into contact with the heart 51.
    As described above, the heart 51 is interlocked by rotary tightening with the second large diameter portion 40c of the chronograph shaft 40. At this time, a predefined friction force is ensured between the second portion of large diameter 40c and the heart 51, the heart 51 can rotate jointly with the chronograph shaft 40. For this reason, the heart 51 rotates around the axis O1 jointly with the chronograph shaft 40 at the time of operation of the chronograph.
    As shown in figs. 2 and 3, part of the outer peripheral surface of the core 51 is formed as a flat contact portion 51a, and the portion of this on the opposite side of the contact portion 51a in the radial direction, with the axis O1 between them, is formed as a protuberance 51 b; thus, the heart is formed in a heart type configuration in a plan view. A portion of the core 51 on the side of the inner edge portion is formed as the protruding tube portion 51c, protruding upward.
    And, when the chronograph reset instruction is produced, the heart 51 is forcibly turned by being struck by the hammer 53, and it is placed in the prescribed position P2 relative to the initial position P1.
    More specifically, as shown in FIG. 4, in the present embodiment, when the chronograph shaft 40 is located at the initial position P1, and the chronograph second hand 14 indicates 12 hours, the protrusion 51b of the heart 51 is directed in the direction of 12 hours; and the position of the heart 51 at this time is the aforementioned prescribed position P2. In fig. 4, the second spiral spring 56 described below is omitted (in FIGS. 7 and 8 also, the second spiral spring 56 is omitted).
    And, when the chronograph reset instruction is produced, the heart 51 is struck by the hammer 53 with a force greater than the aforementioned friction force, which means that it is rotated by force relative to the 'Chronograph shaft 40. And, the hammer 53 comes into contact with the contact portion 51a of the heart 51, which means that the positioning is carried out on the heart 51 at the prescribed position P2 in a stable manner.
    In this way, at the time of operation of the chronograph, the heart 51 rotates jointly with the chronograph shaft 40; and, when the chronograph is reset, it rotates relative to the chronograph shaft 40. As shown in fig. 2, the hammer 53 is disposed between the gear train bridge 21 and the chronograph bridge 22; it is a timepiece component actuated when the reset button 28 is pressed to strike the heart 51 so as to apply an external force thereto.
    CH 709 362 B1 As shown in figs. 2 and 3, the spiral spring 52 is reinforced so as to present an initial elastic force, and is disposed between the protruding tube portion 51c of the heart 51 and the transmission wall portion 50b of the transmission toothed wheel 50. In the example shown, the spiral spring 52 is composed of two spiral springs: a first spiral spring 55, and a second spiral spring 56 placed under the first spiral spring 55 at a certain interval and armed in an opposite direction to the first spiral spring 55.
    As shown in figs. 2, 3 and 5, an outer end 55a of the first spiral spring 55 is connected to the internal surface of the transmission wall portion 50b, and an inner end 55b of this is connected to a ferrule 57 connected to the portion of protruding tube 51 c of the heart 51. Consequently, the first spiral spring 55 is connected to the heart 51 by means of the ferrule 57.
    In this first spiral spring 55, the winding direction from the outer end 55a to the inner end 55b coincides with the direction of forced rotation T1 of the heart 51 when the chronograph is reset. Thus, the first spiral spring 55 undergoes an elastic deformation so as to be reduced in diameter (in the direction of arrow L1 in FIG. 5) with the forced rotation of the heart 51 at the time of resetting the chronograph.
    The forced direction of rotation T1 of the heart 51 at the time of the reset of the chronograph coincides with the direction of rotation of the heart 51 at the time of the operation of the chronograph.
    As shown in figs. 2, 3 and 6, like the first spiral spring 55, the outer end 56a of the second spiral spring 56 is connected to the inner surface of the transmission wall portion 50b, and the inner end 56b thereof is connected to the ferrule 57. Consequently, the second spiral spring 56 is connected to the heart 51 by means of the ferrule 57.
    As described above, this second spiral spring 56 is reinforced opposite the first spiral spring 55, so that it undergoes elastic deformation so as to increase its diameter (in the direction of arrow L2 of the Fig. 6) with the forced rotation of the heart 51 when the chronograph is reset.
    As shown in fig. 2, the rotational braking part 42 is equipped with an oil rotor 60 (forming the second rotary member mentioned in the claims) configured to rotate with the rotation of the chronograph shaft 40, and with a viscous fluid 61 (forming the resistance body mentioned in the claims) configured to apply a rotational resistance to the oil rotor 60.
    The oil rotor 60 is equipped with a rotor pinion 60a and a rotor disc 60b; and an upper pivot portion thereof is rotatably supported by a bearing 22B provided in the chronograph bridge 22, and a lower pivot portion thereof is rotatably supported by a bearing groove 62a of a cavity 62 fixed to the gear train 21. Consequently, the oil rotor 60 can rotate around the axis O2 in a stable manner.
    The rotor pinion 60a is meshed with the toothed portion 50a of the transmission toothed wheel 50. Consequently, the oil rotor 60 can rotate with the rotation of the chronograph shaft 40. The rotor disc 60b is placed inside the cavity 62 and can rotate within the viscous fluid 61 filling the cavity 62.
    The cavity 62 is formed as a cylinder provided with a bottom, open upwards, and is fixed to the gear train 21. The interior of the cavity 62 is filled with the viscous fluid 61. In addition, mounted on the cavity 62, there is an annular cap 63 closing the opening portion, thereby sealing the viscous fluid 61 in the cavity 62, for example, in a liquid tight manner. At the central portion of the lower surface of the cavity 62, the bearing groove 62a has been formed rotatably supporting the lower pivot portion of the oil rotor 60.
    The viscous fluid 61 is, for example, a silicone oil of a predefined viscosity, which communicates to the rotor disc 60b a resistance to rotation (viscous resistance) proportional to the angular speed. Thus, the higher the speed of rotation, the greater the resistance to rotation communicated, thus slowing down the rotation of the oil rotor 60.
    Operation of the timepiece Next, the operation of the timepiece 1, constructed in the manner described above, will be described.
    First, the time display will be briefly described.
    In this case, the crystal oscillator of the crystal oscillator unit oscillates at a predetermined frequency, so that, based on the oscillation of this crystal oscillator, the oscillating part contained in the integrated circuit produces a reference signal, and the dividing part divides the reference signal from the oscillating part. And, based on the output signal from the dividing part, the driving part produces a motor driving signal driving the first stepping motor 25. Therefore, the stator 25b of the first stepping motor step 25 shown in FIG. 1 is magnetized, and the rotor 25c rotates.
    Then, the rotational force of the rotor 25c is transmitted to the second mobile via the fifth mobile, and the second mobile describes a rotation per minute to rotate the second hand 15 so as to describe a rotation by minute. In addition, the rotational force transmitted to the second mobile is transmitted to the third mobile, to the center mobile 30, and to the hour wheel 31, which causes these wheels to rotate. At this time, the center mobile 30 describes a rotation per hour, and the hour wheel 31 describes a rotation every 12 hours. Therefore,
    CH 709 362 B1 the minute hand 13 shown in fig. 1 is made to describe a rotation per hour, and the hour hand 12 is made to rotate every 12 hours. In this way, it is possible to set the time correctly, and to display the time.
    Next, the case where the chronograph is activated will be described.
    In this case, the start / stop button 27 shown in FIG. 1 is pressed. Then, the chronograph drive portion produces a motor drive signal to the rotor 26c of the second stepper motor 26, so that the stator 26b of the second stepper motor 26 is magnetized to rotate the rotor 26c. The rotational force of this rotor 26c is transmitted to the chronograph toothed wheel 45 shown in FIG. 2, and is transmitted to the chronograph shaft 40 via the chronograph spring 46. Consequently, it is possible to cause the chronograph shaft 40 to rotate around the axis O1 by using the position initial P1 as a reference. And, as shown in fig. 1, the chronograph second hand 14 shows time information (measurement of seconds) based on the rotation of the chronograph shaft 40, so that it is possible to execute a time measurement with precision.
    In addition, as shown in Figs. 2 and 3, at the time of operation of the chronograph, both the heart 51 and the transmission toothed wheel 50 rotate with the rotation of the chronograph shaft 40. At this time, the first spiral spring 55 and the second spiral spring 56 do not undergo elastic deformation due to the synchronous rotation of the heart 51 and the transmission toothed wheel 50, but rotate in accordance with the heart 51 and the transmission toothed wheel 50. The oil rotor 60 rotates around the axis O2 with the rotation of the transmission toothed wheel 50. At this moment, the rotor disc 60b rotates within the viscous fluid 61, so that a resistance to rotation is communicated to it; however, the speed of rotation at the time of operation of the chronograph is not high, so that the resistance to rotation by viscous fluid 61 is low, and is not large enough to affect the performance of the chronograph.
    Next, we will describe the case in which the operation of the chronograph is stopped before carrying out a reset.
    In this case, the start / stop button 27 shown in FIG. 1 is pressed again. Then, the output of the motor drive signal from the chronograph drive part is stopped, so that the rotor 26c of the second stepper motor 26 is stopped, and the rotation of the chronograph shaft 40 and the chronograph second hand 14 is stopped.
    Then, the reset button 28 shown in FIG. 1 is pressed to produce the reset instruction; then, the reset portion 41 returns the chronograph shaft 40 to the initial position P1 (reset). Therefore, it is possible to return the chronograph shaft 40 and the chronograph second hand 14 to the previous positions, making the timepiece ready for the next chronograph operation.
    The above-mentioned reset will be described in detail.
    As shown in fig. 7, when the reset instruction is produced, the hammer 53 operates to strike the outer peripheral surface of the heart 51 to apply an external force thereto. Then, as shown in fig. 8, the heart 51 is forcibly turned around the axis O1 by the external force coming from the hammer 53, and is placed in the prescribed position P2 by the hammer 53. At this time, the heart 51 receives an additional external force of the friction force between itself and the second large diameter portion 40c of the chronograph shaft 40, so that it precedes the chronograph shaft 40 in rotation.
    When the heart 51 is forcibly turned, the ferrule 57 rotates jointly with the heart 51, the rotation of the chronograph shaft 40 and the transmission toothed wheel 50 being at rest, so that the first spring in spiral 55 and the second spiral spring 56 undergo elastic deformation. At this time, as shown in Figs. 5 and 8, the first spiral spring 55 undergoes elastic deformation so as to be reduced in diameter and, as shown in FIG. 6, the second spiral spring 56 undergoes elastic deformation so as to increase in diameter.
    Thus, when the heart 51 is placed in the prescribed position P2, the first spiral spring 55 and the second spiral spring 56 begin to undergo resumption of shape; and, as shown in fig. 8, the transmission toothed wheel 50 is caused to rotate with a delay so as to be in conformity with the forced rotation of the heart 51. Consequently, it is possible to rotate the chronograph shaft 40 and the second hand chronograph 14 around the axis O1 by means of the transmission toothed wheel 50 and, as shown in FIG. 4, it is possible to bring them back to their previous positions.
    In this way, the heart 51 is first forcibly turned, then the chronograph shaft 40 and the chronograph second hand 14 are brought to zero using the resumption of shape of the first spiral spring 55 and of the second spiral spring 56, so that it is possible to carry out a reinitialization by means of a continuous movement of regular needle.
    As described above, until the chronograph shaft 40 is brought back to the initial position P1 by the reset part 41, the rotation braking part 42 brakes the rotation speed of l chronograph shaft 40. Therefore, it is possible to control the reset speed of the chronograph shaft 40; and, instead of
    CH 709 362 B1 instantly return the chronograph shaft 40 to the initial position P1, it is possible to carry out the reset while carrying out a continuous movement of the hand at a desired reset speed.
    This will be described in detail below.
    When the transmission toothed wheel 50 is turned by means of the resumption of shape of the first spiral spring 55 and the second spiral spring 56, the oil rotor 60 rotates around the axis O2 with the rotation of the transmission toothed wheel 50, as shown in fig. 2. In this process, the rotor disk 60b rotates within the viscous fluid 61, so that the oil rotor 60 receives from the viscous fluid 61 a resistance to rotation proportional to the angular speed. Thus, instead of instantly returning the chronograph shaft 40 to the initial position P1, it is possible to return it there, with the reset speed being braked.
    By adjusting the type of viscous fluid 61, the volume of the interior of the cavity 62, the configuration of the rotor disk 60b, etc., it is possible to adjust the reset speed.
    As described above, in the chronograph mechanism 24 of the present embodiment, it is possible to return the chronograph shaft 40 and the chronograph second hand 14 to their previous positions by means of a continuous movement of the needle while controlling the reset speed. Thus, it is possible to prevent an excessive load from acting on the chronograph shaft 40 and the chronograph second hand 14, which makes it possible to eliminate the design limitations taking account of the load. Furthermore, it is possible to return the chronograph shaft 40 and the chronograph second hand 14 by means of a continuous movement of the hand to a desired reset speed, so that it is possible to quickly make the timepiece ready for the next time measurement and, at the same time, it is possible to improve the external appearance of the movement of the chronograph shaft 40 and the chronograph second hand 14 at time of reset, which results in improved design property.
    In particular, the speed of rotation of the transmission toothed wheel 50 tends to increase gradually with the resumption of shape of the first spiral spring 55 and of the second spiral spring 56. Thus, in the present embodiment, when resetting the chronograph shaft 40, it is possible to temporarily increase the reset speed, then return it to the initial position P1 while gradually reducing its speed due to braking by the fluid viscous 61. Thus, it is possible to communicate a unique variation in the movement of the chronograph shaft 40 and the chronograph second hand 14 different from that in the prior art, which makes it possible to obtain an additional improvement. in terms of design property and enhance added value.
    In addition, in the above embodiment, use is made of the spiral spring 52 having the first spiral spring 55 and the second spiral spring 56, so that it is possible to use the deformation in bending of the spiral spring 52, which enables the chronograph shaft 40 to be reset with high precision for a long period of time, thereby improving reliability.
    In addition, use is made of the first spiral spring 55 and the second spiral spring 56 having reversals of reverse shape, so that it is possible to bring the chronograph shaft 40 to rest relative to the initial position P1 in a more stable and faster manner, which makes it possible to reset the chronograph shaft 40 even more precisely.
    In addition, the movement 10 and the timepiece 1 according to the present embodiment are equipped with the chronograph mechanism 24 above, so that there is no limitation in terms of design; in addition, it is possible to provide a movement 10 of quality and a timepiece 1 superior in operating performance.
    Second embodiment [0108] Next, the second embodiment of the present invention will be described with reference to the sketches. In this second embodiment, the parts which are the same as the components of the first embodiment are indicated by the same reference numerals, and a description thereof will be excluded.
    While in the first embodiment, the chronograph shaft 40 and the heart 51 are arranged coaxially, they are arranged flat in the second embodiment.
    As shown in Figs. 9 and 10, in a chronograph mechanism 70 of the present embodiment, a heart wheel 72 comprising the chronograph shaft 40, a transmission wheel 71 and the heart 51 is arranged in a plane manner between the gear train 21 and the chronograph bridge 22. In FIGS. 9 and 10, some of the timepiece components are omitted depending on the situation to simplify the sketches.
    A second chronograph gear 73 is fixed to the first large diameter portion 40b of the chronograph shaft 40, for example, by force insertion. At the level of the outer edge portion of the second chronograph toothed wheel 73, a toothed portion 73a is formed over the entire periphery, and is meshed with the rotor pinion 60a of the oil rotor 60.
    The transmission wheel 71 is equipped with a transmission wheel shaft 74, and a transmission toothed wheel 50 fixed to the transmission wheel shaft 74. An upper pivot portion of the shaft transmission wheel 74 is
    CH 709 362 B1 rotatably supported by a bearing 22C provided on the chronograph bridge 22, and a lower pivot portion of the latter is rotatably supported by a bearing groove 21A provided in the gear train bridge 21. By Consequently, the transmission wheel 71 can rotate stably around an axis 03.
    The transmission gear 50 is fixed to the portion of the transmission wheel shaft 74 located below the upper pivot portion. In addition, the toothed portion 50a of the transmission toothed wheel 50 of the present embodiment is in mesh with the toothed portion 73a of the second chronograph toothed wheel 73. Consequently, the transmission wheel 71 rotates around the axis. 03 with the rotation of the chronograph shaft 40.
    The ferrule 57 is rotatably nested with the portion of the transmission wheel shaft 74 located below the transmission toothed wheel 50. And, between the ferrule 57 and the transmission wall portion 50b of the transmission toothed wheel 50, a spiral spring 75 has been placed (forming the elastic member mentioned in the claims) reinforced so as to present an initial elastic force. The outer end of the spiral spring 75 is connected to the transmission wall portion 50b and its inner end is connected to the ferrule 57.
    In addition, an annular coupling toothed wheel 76 having a toothed portion 76a on the entire periphery of its outer edge portion is fixed to the ferrule 57 so as to be disposed under the spiral spring 75.
    A predefined frictional force is ensured between the transmission wheel shaft 74 and the ferrule 57, and the ferrule 57 can rotate jointly with the transmission wheel shaft 74. Thus, at the time of the operation of the chronograph, the ferrule 57 and the coupling toothed wheel 76 rotate around the axis 03 together with the transmission wheel shaft 74.
    The heart wheel 72 is equipped with a heart wheel shaft 77, the heart 51 fixed to the heart wheel shaft 77 and a circular heart gear 78 in a plan view and fixed to the heart wheel shaft 77.
    The upper pivot portion of the heart wheel shaft 77 is rotatably supported by a bearing 22D provided on the chronograph bridge 22, and the lower pivot portion thereof is rotatably supported by a bearing groove 21B provided in the gear train 21. Consequently, the core wheel 72 can rotate around an axis 04 in a stable manner.
    A heart gear 78 is disposed between the upper pivot portion of the heart wheel shaft 77 and the heart 51; it comprises, at its outer edge portion and over the entire periphery, a toothed portion 78a meshing with the toothed portion 76a of the coupling toothed wheel 76. Consequently, at the time of operation of the chronograph, the heart wheel 72 rotates around axis 04.
    As described above, in this embodiment, the inner end of the spiral spring 75 is connected to the heart 51 by means of the ferrule 57, the coupling gear 76, the wheel heart gear 78 and heart wheel shaft 77. Thus, the ferrule 57, the coupling gear wheel 76, the heart gear wheel 78 and the heart wheel shaft 77 constitute a drive train 79 connected to the heart 51, and the inner end of the spiral spring 75 and the heart 51 are connected to each other by means of this drive train 79.
    Operation of the Chronograph Mechanism In the chronograph mechanism 70, constructed as described above, at the time of operation of the chronograph, with the rotation of the chronograph shaft 40, the transmission wheel 71 rotates around the axis 03, the core wheel 72 rotates around the axis 04 and the oil rotor 60 rotates around the axis O2. At this time, the transmission toothed wheel 50 and the coupling toothed wheel 76 rotate in synchronization with each other, so that the spiral spring 75 does not undergo elastic deformation, but rotates in accordance with the wheel transmission gear 50 and coupling gear 76.
    Then, after the chronograph stops operating, when a reset instruction is produced, the hammer 53 strikes the outer peripheral surface of the heart 51 to apply an external force to it, so that the whole heart wheel 72 is forcibly rotated around the axis 04. Thus, the coupling gear 76 and the ferrule 57 rotate around the axis 03 with the forced rotation of the heart 51. At this moment, the ferrule 57 receives an external force in plus the friction force between itself and the transmission wheel shaft 74, so that it precedes the transmission wheel shaft 74 at rest in rotation. Consequently, the spiral spring 75 undergoes elastic deformation so as to be reduced or increased in diameter.
    And, the spiral spring 75 begins to undergo a recovery in shape after the elastic deformation, causing the transmission toothed wheel 50 to rotate with a delay in accordance with the forced rotation of the heart wheel 72 and the coupling gear 76. Consequently, it is possible to rotate the chronograph shaft 40 and the chronograph seconds hand 14 around the axis O1 by means of the transmission gear 50 and the second chronograph gear 73, and return them to their previous position.
    In this way, as in the case of the first embodiment, also in the case of the chronograph mechanism 70 of the present embodiment, it is possible to first forcibly turn the heart 51, then to reset zero the chronograph shaft 40 and the chronograph second hand 14 using the resumption of the spiral spring 75, which allows the reset to be carried out by means of a continuous regular movement of the hand.
    CH 709 362 B1 [0125] In particular, in the case of the present embodiment, the chronograph shaft 40, the transmission wheel 71 and the heart wheel 72 comprising the heart 51 are arranged in a planar manner, which contributes to a reduction in the thickness of the movement 10 and of the timepiece 1. Otherwise, this embodiment can provide the same effects as the first embodiment.
    Modification [0126] While in the second embodiment described above, a spiral spring 75 is used, this should not be interpreted restrictively; as in the first embodiment, it is also possible to use the two spiral springs that are the first spiral spring 55 and the second spiral spring 56. In particular, by using two spiral springs of different directions of winding, the chronograph shaft 40 can be easily brought to rest at the initial position P1, which is desirable.
    In addition, while in the second embodiment above, the transmission wheel 50 and the heart 51 are arranged in a planar fashion, it is also possible, as shown, for example, in FIGS. 11 and 12, to arrange them coaxially.
    [0128] Figs. 11 and 12 show a chronograph mechanism 80, the transmission wheel 71 of which is equipped with the heart 51. More specifically, instead of the coupling toothed wheel 76, the heart 51 is fixed to the ferrule 57 nested by rotationally tightening with the drive wheel shaft 74.
    [0129] Also in this structure, it is possible to obtain the same effect as the second embodiment. In particular, in this case, it is possible to omit the heart wheel 72, so that it is possible to carry out a simplification of structure.
    Third embodiment Next, the third embodiment according to the present invention will be described with reference to the sketches. In this third embodiment, the components which are the same as those of the first embodiment are indicated by the same reference numbers, and a description thereof will be excluded.
    While in the first embodiment, the first spiral spring 55 and the second spiral spring 56 are used as an example of the elastic member, the third embodiment employs a control lever spring .
    As shown in figs. 13 and 14, in a chronograph mechanism 90 according to the present embodiment, a control lever 91 and a control lever spring 92 (forming the elastic member mentioned in the claims) are mounted on the lower surface of the wheel transmission tooth 50.
    The control lever 91 is arranged so as to be superimposed on the lower surface of the transmission toothed wheel 50; and its distal end 91a is formed as a free end, and its proximal end 91b is mounted on the lower surface of the transmission toothed wheel 50 via a rotation pin 93 rotatably around the pin of rotation 93.
    Like the control lever 91, the control lever spring 92 is arranged so as to be superimposed on the lower surface of the transmission toothed wheel 50, and is formed in an arcuate configuration along the outer periphery of the transmission toothed wheel 50. One end side of the control lever spring 92 is fixed to the lower surface of the transmission toothed wheel 50 by means of two fixing pins 94. The other end of the control lever 92 is formed as a free end 92a susceptible to elastic deformation, which constantly presses the control lever 91 in the direction of the heart 51. Consequently, the control lever 91 receives an elastic force (pushing force ) due to the control lever spring 92, and the distal end 91a thereof constantly presses the outer peripheral surface of the heart 51. In the initial state al, the distal end 91a of the control lever 91 presses the contact portion 51a of the heart 51.
    The core 51 of this embodiment has a greater thickness than that of the first embodiment; and the hammer 53 can strike the outer peripheral surface of the heart 51 without interfering with the control lever 91 and the control lever spring 92.
    Operation of the Chronograph Mechanism In the chronograph mechanism 90, constructed as described above, as shown in FIG. 14, at the time of operation of the chronograph, with the rotation of the chronograph shaft 40, the transmission toothed wheel 50 and the heart 51 rotate around the axis O1 in synchronization with each other, so that the control lever 91 and the control lever spring 92 are inoperative, but rotate in accordance with the transmission toothed wheel 50 and the heart 51.
    Then, when the reset instruction is produced after stopping the operation of the chronograph, the hammer 53 strikes the outer peripheral surface of the heart 51 to apply an external force to it, as shown in fig. 15, so that the heart 51 is forced into rotation about the axis O1, and is placed in the prescribed position P2
    CH 709 362 B1 by hammer 53. At this time, the heart 51 receives an external force in addition to the friction force between itself and the second large diameter portion 40c of the chronograph shaft 40, so that 'it precedes the rotating chronograph shaft 40.
    When the heart 51 is forcibly turned, the distal end 91a of the control lever 91 describes a relative movement along the outer peripheral surface of the heart 51, and the distal end 91a rotates around the rotation pin 93 so as to move radially outwards. As a result, the control lever spring 92 undergoes outward elastic deformation in the radial direction. Thus, when the heart 51 is placed in the prescribed position P2, the control lever spring 92 begins to undergo shape recovery, and further presses the distal end 91a of the control lever 91 against the outer peripheral surface of the heart 51. At this moment, the control lever 91 and the control lever spring 92 receive the reaction force R of the heart 51, so that they receive the moment of rotation around the transmission toothed wheel 50, making in so that the transmission toothed wheel 50 rotates with a delay in accordance with the forced rotation of the heart 51.
    [0139] Consequently, as shown in FIG. 16, it is possible to rotate the chronograph shaft 40 and the chronograph second hand 14 around the axis O1 by means of the transmission toothed wheel 50, which makes it possible to return them to the position initial P1. As a result of this reset, the distal end 91a of the control lever 91 is again placed in the state in which it presses the contact portion 51a of the heart 51.
    In this way, also in the case of the present embodiment, it is possible to first forcibly turn the heart 51, then to reset the chronograph shaft 40 and the chronograph seconds hand 14 using the resumption of shape of the control lever spring 92, which makes it possible to carry out the reinitialization by means of a continuous movement of regular needle. Otherwise, this embodiment can provide the same effects as the first embodiment.
    The technical scope of the present invention is not limited to that of the above embodiments, but allows various modifications without departing from the scope of the spirit of the present invention.
    [0142] For example, while the embodiments described above are applied to the quartz timepiece 1 by way of example, it is also possible to apply them to a mechanical timepiece. In addition, as described above, one or two spiral springs can be used as an elastic member; or a structure other than a spiral spring, such as a control lever spring, can be adopted.
    In addition, while in the embodiments described above, the chronograph shaft 40 on which the chronograph second hand 14 is mounted is reduced to zero by way of example, it is also possible resetting the chronograph shaft 40 on which the chronograph minute hand and the chronograph hour hand are mounted.
    In addition, in the embodiments described above, it is also possible to form a resistance adjustment groove to adjust the viscous resistance or a resistance protuberance like a fin in or on the rotor disc 60b of the oil rotor 60. This makes it possible to easily adjust the resistance to rotation of the oil rotor 60, which further facilitates the control of the reset speed of the chronograph shaft 40.
    In addition, while in the embodiments described above, the viscous fluid 61 is used as a resistance body by way of example, this should not be interpreted in a restrictive manner. For example, it is also possible to use a gas such as air or a specific gas. In this case also, it is possible to apply a resistance to rotation by means of an appropriate mechanism as regards the configuration of the rotor disk 60b, etc.
    In addition, as shown in Figs. 17 and 18, it is also possible to use a spiral spring.
    [0147] FIGS. 17 and 18 show a chronograph mechanism 100 based on a modification of the third embodiment; the components which are the same as those of the third embodiment are indicated by the same reference numbers, and a description of these will be excluded.
    In this case, the chronograph mechanism 100 is equipped with a rotation braking part 103 comprising a rotor (forming the second rotary member mentioned in the claims) 101 configured to rotate with the rotation of the chronograph shaft 40, and a spiral spring 102 (forming the resistance body mentioned in the claims) communicating a resistance to rotation to the rotor 101.
    The rotor 101 has a rotor pinion 101a meshing with the toothed portion 50a of the transmission toothed wheel 50, and a ferrule 105 fixed to a portion located under the rotor pinion 101a. The spiral spring 102 is armed so as to present an initial elastic force; its inner end 102a is fixed to the ferrule 105 and its outer end 102b is formed as a free end, which is in contact with the internal surface of the cavity 62. In this case, the outer end 102b of the spiral spring 102 presses the internal surface of the cavity 62 from the internal face. Consequently, with the rotation of the rotor 101, the spiral spring 102 rotates, with its outer end 102b constantly pressing the internal surface of the cavity 62.
    Thus, in this case also, it is possible to apply a resistance to rotation to the rotor 101, which makes it possible to brake the speed of resetting to zero of the chronograph shaft 40.
    权利要求:
    Claims (8)
    [1]
    Claims
    1. Display mechanism for a timepiece comprising:
    an indication part (40) configured to rotate using an initial position (P1) as a reference;
    a display part (14) showing time information based on the rotation of the indication part (40);
    a reset portion (41) configured to return the indication portion (40) to the initial position based on a command to stop displaying the time information; and a rotational braking part (42; 103) configured to brake the rotational speed of the indication part (40) until the indication part (40) is returned to the initial position.
    [2]
    2. Display mechanism for a timepiece according to claim 1, in which the reset part (41) comprises:
    a first rotary member (50) configured to rotate with the rotation of the indication portion (40);
    a heart (51) which rotates with the rotation of the indication part (40) in the absence of the stop command and which is forcibly turned on the base of the stop command so as to be placed in a prescribed position with respect to the initial position; and an elastic member (52, 55, 56; 75; 92) which undergoes an elastic deformation with the forced rotation of the heart (51) and which, taking up a shape prior to the elastic deformation, rotates the first rotary member (50) in accordance with the forced rotation of the heart (51) to return the indication part (40) to the initial position.
    [3]
    3. Display mechanism for a timepiece according to claim 2, in which the elastic member is a spiral spring (52, 55, 56; 75) which is armed so as to present an initial elastic force, of which l the outer end is connected to the first rotary member (50), and the inner end of which is connected to the heart (51) or to a drive train connected to the heart (51).
    [4]
    4. A display mechanism for a timepiece according to claim 3, wherein the spiral spring is a first spiral spring (55), the reset portion (41) comprising a second spiral spring (56) which undergoes elastic deformation with the forced rotation of the heart (51) and which, by resuming a shape prior to the elastic deformation, rotates the first rotary member (50) in accordance with the forced rotation of the heart (51) to bring the part indication (40) in the initial position, the second spiral spring (56) being armed in a direction opposite to the first spiral spring.
    [5]
    5. Display mechanism for a timepiece according to one of claims 1 to 4, in which the rotation braking part (42; 103) is equipped with a second rotary member (60; 101) configured to rotate. with rotation of the indication part, and a resistance body (61; 102) configured to apply a resistance to rotation to the second rotary member.
    [6]
    6. Display mechanism for a timepiece according to claim 5, wherein the resistance body communicates a resistance to rotation proportional to the angular speed of the second rotary member.
    [7]
    7. Timepiece movement equipped with a display mechanism for a timepiece (24) according to one of claims 1 to 6.
    [8]
    8. Timepiece equipped with a timepiece movement (10) according to claim 7.
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    同族专利:
    公开号 | 公开日
    JP2015166717A|2015-09-24|
    CH709362A2|2015-09-15|
    JP6319834B2|2018-05-09|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    JPS528859A|1975-07-11|1977-01-24|Seiko Epson Corp|Double needle system|
    JPS6027985Y2|1979-07-13|1985-08-23|
    JPH01292286A|1988-05-19|1989-11-24|Seiko Epson Corp|Electronic time-piece|
    JP3745052B2|1996-10-30|2006-02-15|シチズン時計株式会社|Pointer-type electronic watch|
    JP2000050611A|1998-07-28|2000-02-18|Nippon Seiki Co Ltd|Indicating instrument stepping motor|
    JP4831477B2|2006-05-25|2011-12-07|日本精機株式会社|Instrument device and driving method thereof|
    CH700751B1|2009-04-15|2014-12-15|Patek Philippe Sa Geneve|chronograph mechanism, timepiece provided with such a mechanism and method for adjusting such a mechanism.|
    JP5536623B2|2010-02-03|2014-07-02|セイコーインスツル株式会社|Chronograph clock|JP3062109B2|1996-06-21|2000-07-10|ウエスト電気株式会社|Strobe device and image recording device incorporating the strobe device|
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    申请号 | 申请日 | 专利标题
    JP2014041578A|JP6319834B2|2014-03-04|2014-03-04|Clock display mechanism, clock movement and clock|
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