JP2008175737A - Power reserve indication mechanism and mechanical clock with the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power reserve indication mechanism capable of accurately displaying a power reserve amount in a desired region, and to provide a mechanical clock with the same. <P>SOLUTION: The power reserve indication mechanism 2 of the mechanical clock has, at a constant interval, first wheels 50 that are rotated in one direction E1 according to winding of a spiral spring, are rotated in the opposite direction E2 according to unwinding of the spiral spring, and have a plurality of engaging claws 51 on its outer periphery, and second wheels 70 that displace display needles 76 of the power reserve amount in one direction A1 when it is rotated in one direction, displace display needles 76 of the power reserve amount in the opposite direction A2 when it is rotated in the opposite direction, and have engaging claws 73 capable of engaging with the plurality of engaging claws 51 of the first wheels 50. Each first wheel 50 has the plurality of first engaging claws 51 at the constant interval in a partial angle range, and an engaging claw lack region 53 lacking the plurality of second engaging claws in another partial angle range. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a power reserve display mechanism and a mechanical timepiece having the power reserve display mechanism.

  In a mechanical timepiece that uses a mainspring as a drive source, a power reserve display mechanism that displays the remaining time that can be driven by the mainspring (in this specification, also referred to as “power reserve amount” to “power reserve” or “mainspring remaining amount”) Various types have been developed.

  The power reserve display mechanism includes a winding mark wheel that rotates a winding mark display pointer that displays a power reserve amount in one direction or in the opposite direction according to rotation in one direction or in the opposite direction, and a drive engaged with the winding mark wheel. A winding mark wheel rotation mechanism provided with a wheel, and when the driving wheel is rotated in one direction in response to winding of the mainspring, the driving wheel is rotated in the one direction, and the mainspring is rewound. In response to the rotation, the winding wheel is rotated in the opposite direction.

  In a conventional power reserve display mechanism, typically, a winding stamp wheel is provided with engagement teeth at equal intervals on the outer periphery, and the winding stamp wheel rotation mechanism also has an engagement tooth engaged with the engagement teeth of the winding stamp wheel on the outer periphery. Are provided with engagement gears provided at equal intervals (for example, Patent Document 1).

  Therefore, in the conventional power reserve display mechanism, the engagement gear of the winding mark wheel rotating mechanism and the winding mark wheel are rotated at an equal angle (constant speed) in proportion to the fluctuation of the power reserve amount accompanying the winding or unwinding of the mainspring. In practice, the winding mark display pointer is always rotated by an angle proportional to the remaining amount of the mainspring.

  In addition, in order to reduce the speed with the minimum occupied space, a power reserve display mechanism is proposed that uses a toothed wheel with engaging pawls at two circumferential positions at equal angular intervals of 180 degrees instead of gears. (Patent Document 2). In the power reserve display mechanism of Patent Document 2, the engagement gear of the winding mark wheel rotating mechanism and the winding mark wheel rotate at an equal angle (constant speed) in proportion to the fluctuation of the power reserve amount accompanying the winding or unwinding of the mainspring. The winding mark indicating pointer is practically always rotated by an angle proportional to the remaining amount of the mainspring as in the case of Patent Document 1.

However, the display area displayed by the winding mark display pointer is usually a fan-shaped area formed in a partial area of the dial plate and is narrow, so that it is difficult to accurately recognize the desired power reserve amount.
JP-A-11-183462 Japanese Patent No. 2757147

  The present invention has been made in view of the above-described points, and an object of the present invention is to provide a power reserve display mechanism capable of displaying a power reserve amount in a desired region with high accuracy and a mechanical type equipped with the power reserve display mechanism. To provide a watch.

  The power reserve display mechanism of the present invention is a first vehicle that is rotated in one direction in response to winding of the mainspring of the watch and rotated in the opposite direction in response to rewinding of the mainspring in order to achieve the above object. , With a plurality of engaging pawls on the outer periphery at unequal intervals (which may be referred to as “non-equal intervals”), and when rotating in one direction, the power reserve amount display means is displaced in one direction A second vehicle that displaces the power reserve amount display means in the opposite direction when rotated in the direction, and the engagement pawls engageable with the plurality of engagement pawls of the first vehicle are equally spaced To prepare for.

  In the power reserve display mechanism of the present invention, the second wheel is rotated by the non-uniformly-engaged engagement claws of the first vehicle having a plurality of engagement claws on the outer periphery at non-uniform intervals. When rewinding, the rotation of the first car is transmitted to the second car at non-constant speed, and the power reserve amount (mainspring remaining amount) in the desired area is displayed in a wider range than the power reserve amount in the other areas. Thus, the power reserve amount in the desired area can be displayed with high accuracy.

  The power reserve amount display means, that is, the power reserve amount display means, typically comprises a display pointer that is rotated along a sector region. However, it may be rotated 180 degrees or more (for example, about 360 degrees or more), moved linearly, or displaced along another path.

  In the above, for the plurality of engaging claws of the first vehicle, the interval between the engaging claws adjacent in the circumferential direction may be variously different. However, in the power reserve display mechanism of the present invention, typically, The first wheel has a plurality of first engagement pawls at equal intervals in a part of the angular range of the outer periphery and a second plurality of engagement pawls in another part of the angular range. If the first car engagement pawl missing area faces the second car engagement pawl, the first car is actually idle and the first car Transmission of rotation to the second car is prohibited.

  In this case, by selecting a region other than the desired region as the engagement claw-missing region, the power reserve amount fluctuation is actually enlarged and displayed in a region other than the region corresponding to the missing region. The amount of power reserve becomes visible with high accuracy.

  In the above description, the engagement claw missing region is typically one continuous location, but may be a plurality of discontinuous locations if desired.

  In one typical aspect of the power reserve display mechanism of the present invention, when the power reserve amount is equal to or lower than a predetermined level, the engagement claw missing region is configured to face the engagement claw of the second vehicle. The

  In this case, since the fluctuation of the power reserve amount is actually enlarged and displayed in the region where the power reserve amount is equal to or higher than the predetermined level, the power reserve amount is displayed with high accuracy in the region where the power reserve amount is equal to or higher than the predetermined level. Can be done. In a mechanical timepiece, in general, when the mainspring is in a winding state that is relatively close to a full winding state, the rate is small and the accuracy of timekeeping / hand movement is high. Accordingly, the spiral winding area is highlighted so that the mechanical timepiece is kept highly accurate. In other words, the user simply uses a mechanical watch so that the power reserve amount is maintained in an area where the fluctuation of the power reserve amount is enlarged and displayed. You can use a watch.

  Even in this case, instead of prohibiting the rotation of the second vehicle in the entire region below the predetermined level, the rotation of the second vehicle may be performed in some regions (for example, in the region where the power reserve amount is zero to the vicinity thereof). In that case, the power reserve amount is small, but the watch moves with a certain degree of accuracy, and the power reserve amount is actually zero and the watch is actually stopped. Can do.

  In another typical aspect of the power reserve display mechanism of the present invention, when the power reserve amount is a predetermined level or more, the engagement pawl missing area faces the engagement pawl of the second vehicle. Configured as follows.

  In this case, since the power reserve amount is actually enlarged and displayed in the region where the power reserve amount is not more than the predetermined level, the power reserve amount can be displayed with high accuracy in the region where the power reserve amount is not more than the predetermined level. . Therefore, the continuation of the timekeeping / hand movement of the mechanical timepiece is clarified, and the stoppage of the timepiece due to the end of the continuation is highlighted. In other words, in a region where the amount of power reserve is small, the user knows that the power reserve amount is accurately known and that the watch is used, and that when the hand movement of the watch stops, the stop is due to the actual complete rewinding of the mainspring. Easy to convey.

  Even in this case, instead of prohibiting the rotation of the second vehicle in the entire region above the predetermined level, in some regions (for example, the power reserve amount is the maximum amount and its vicinity region), the second vehicle It is also possible to make it possible to visually recognize that the mainspring has been fully wound.

  The power reserve display mechanism of the present invention typically further includes a jumper that dramatically controls the rotation of the second vehicle.

  In this case, even if the pawl wheels are not actually engaged with each other, it is possible to prevent the rotational position of the second vehicle from being shifted by the jumping claw of the jumper. Since the first vehicle is engaged with the train wheel on the barrel side, there is virtually no possibility of unexpected rotation.

  The power reserve display mechanism of the present invention typically further includes a rotation range restricting means for restricting the rotatable range of the second vehicle.

  In this case, even if an unexpected external force is applied to the second car, it is possible to suppress the rotational position of the second car from being greatly shifted, and when the positional deviation is small, It is also possible to return the rotational position of the vehicle to a predetermined position. Here, the rotation range restricting means is typically loosely fitted into the fan-shaped opening formed in the second wheel or the wheel of the winding wheel train rotated by the second wheel and the opening. It consists of a pin for determining the degree of winding.

  In the power reserve display mechanism of the present invention, typically, the second vehicle is a winding mark wheel. In this case, rotation can be transmitted directly directly to the winding mark pointer. However, when the final stage of the winding stamp train is constituted by a plurality of vehicles, the second vehicle may be a winding stamp transmission wheel positioned upstream of the winding stamp wheel.

  The power reserve display mechanism of the present invention typically includes a planetary gear mechanism, and the first vehicle is a final vehicle of the planetary gear mechanism, typically a second solar vehicle. In this case, rotation can be transmitted directly directly to the winding mark pointer. However, when the last car in the winding wheel train is composed of a plurality of cars, the first car is a winding car that transmits the rotation of the last car of the planetary gear mechanism to the car. May be.

  In the power reserve display mechanism of the present invention, the first vehicle typically includes an engagement claw that restricts the rotation of the second vehicle when the mainspring is fully wound.

  In this case, even if an unexpected small rotation that causes the rotational phase of the second vehicle to deviate from the first vehicle occurs in the second vehicle, when the mainspring is fully wound, the second vehicle is It becomes possible to return to the position.

  The first wheel may be provided with an engagement claw that restricts the rotation of the second wheel when the mainspring is completely rewound. In that case, when the power reserve amount becomes zero, the second vehicle can be returned to the predetermined position.

  The mechanical timepiece of the present invention typically includes a power reserve display mechanism as described above. In addition, even if the mechanical watch is of the manual winding type (method of winding the mainspring by turning the winding stem), the automatic winding type (method of winding the mainspring according to the rotation (oscillation) of the rotating weight) However, you may have both systems.

  A preferred embodiment of the present invention will be described based on a preferred embodiment shown in the accompanying drawings.

  A mechanical timepiece 1 according to a preferred embodiment of the present invention shown in FIGS. 1 and 2 includes a power reserve display mechanism 2 according to a preferred embodiment of the present invention.

  As can be seen from the longitudinal sectional view of FIG. 2, the timepiece 1 includes a base plate 10, a second base plate 12, a first receiver 14, and a second wheel train receiver 18 as stationary supports to support various movable parts.

  A barrel 20 is supported between the main plate 10 and the first receiver 14 so as to be rotatable around the central axis C5. The barrel 20 forms a chamber 29 in which the mainspring 21 is accommodated in cooperation with the barrel lid 28 and the outer peripheral end of the mainspring 21 is engaged with the inner peripheral end of the mainspring 21. And a square hole wheel 24 fixed to the barrel 23. The barrel complete 22 has a barrel gear 25 on the outer periphery of the large diameter portion, and a barrel full 26 on the small diameter portion through which the barrel complete 23 penetrates. The barrel complete 23 has a barrel complete 27 at the protruding end.

  The mainspring 21 is wound by the B1 direction rotation of the square wheel 24 according to manual rotation (manual winding) of a winding stem (not shown) and rotation (automatic winding) of the rotating weight 16. Of course, only one of manual winding or automatic winding may be used.

  The power reserve display mechanism 2 includes a planetary gear mechanism 30 and a winding mark display mechanism 60. A planetary transmission wheel 90 is disposed between the planetary gear mechanism 30 and the barrel 27. The planetary transmission wheel 90 includes a first planetary transmission wheel 91 and a second planetary transmission wheel 92 that are rotated around the central axis C2. The first planet transmission wheel 91 is engaged with the barrel 27, and the second planet transmission wheel 92 is slip-engaged with the planet transmission wheel 93 so that it can rotate with respect to the planet transmission wheel 93 when the load becomes excessive. ing.

  The planetary gear mechanism 30 is centered at an eccentric position of the first sun wheel 31, the second sun wheel 40, the planetary intermediate wheel 34, and the disk-shaped main body 35 of the planetary intermediate wheel 34 that can rotate around the central axis C <b> 1. A first planetary wheel 37 and a second planetary wheel 38 are integrally rotatable around the axis C3. The first sun wheel 31 is meshed with the barrel 26 by a large-diameter gear part (first sun gear) 32, and meshed with the first planetary wheel 37 by a small-diameter gear part (first sun kana) 33. The planetary intermediate wheel 34 is engaged with the second planetary transmission wheel 92 by a gear portion (planetary intermediate gear) 36 on the outer periphery of the disc-shaped main body 35. The second sun wheel 40 includes a small-diameter gear portion (kana portion) 41 and a large-diameter pawl wheel portion 50, and is engaged with the second planetary wheel 38 by the small-diameter gear portion (second sun kana) 41.

  At the time of winding the mainspring 21, the barrel wheel 22 is actually stationary, so the first sun wheel 31 meshed with the barrel 26 is a fixed wheel. Therefore, when the square wheel 24 and the barrel 23 connected thereto are rotated in the B1 direction for winding the mainspring 21, the planetary transmission wheel 90 meshing with the barrel 27 is rotated in the D1 direction. According to the rotation of the transmission wheel 90, the planetary intermediate wheel 34 of the planetary mechanism 30 is rotated in the E1 direction. In response to the rotation of the planetary intermediate wheel 34 in the E1 direction, the planetary wheels 37 and 38 are revolved in the E1 direction around the first sun wheel 31 that functions as a fixed wheel. Since the diameter of the second planetary wheel 38 is smaller than the diameter of the first planetary wheel 37, the second solar wheel 40 that meshes with the second planetary wheel 38 according to the revolution of the planetary wheels 37, 38 in the E1 direction (first 41) is rotated in the E1 direction, and the second wheel 50 of the second solar wheel 40 is rotated in the E1 direction.

  On the other hand, when the mainspring 21 is rewound, the rotation of the square wheel 24 is regulated by the helix (not shown), so that the planetary intermediate wheel meshed with the barrel 27 through the planetary transmission wheel 90. 34 works as a fixed car. Therefore, according to the B1 direction rotation of the barrel 22 in response to the rewinding of the mainspring 21, the first sun wheel 31 meshed with the barrel 26 is rotated in the E2 direction. When the first sun wheel 31 is rotated in the E2 direction, the pinion portion (second sun pin) 41 of the second sun wheel 40 is rotated in the E2 direction via the planetary wheels 37 and 38, and the second sun wheel 40 is rotated. The second wheel 50 is rotated in the E2 direction.

  The winding mark display mechanism 60 includes a winding mark wheel 70 provided with a disk-shaped main body 71 and a pawl wheel part 72, a jumping mark jumper 62 for jump control of the winding mark wheel 70, and a central axis C4 of the winding mark wheel 70. And a rotation range regulating mechanism 80 around. The pawl wheel 72 is provided with engaging pawls 73, 73, 73,.

  The rotation range restriction mechanism 80 of the winding mark wheel 70 includes a fan-shaped opening 81 formed in the disc-shaped main body 71 of the winding mark wheel 70 and a winding degree determining pin 82 loosely fitted in the opening 81. Have. The winding degree determining pin 82 is wound within a range in which a distal end portion 83 that is planted on the second base plate 12 at the base end portion and is loosely fitted in the opening 81 contacts the side edges 84 and 85 of the fan-shaped opening 81. The stamp wheel 70 is allowed to rotate in the A1 and A2 directions. The winding mark jumper 62 is fixed to the second base plate 12 at one end 65, and the jumping head 63 is pressed against the engaging pawls 73, 73 on the outer periphery of the pawl wheel 72 by the spring portion 64. Suppresses the rotation in the A1 and A2 directions.

  The pawl wheel portion 50 of the second solar wheel 40 has N1 engagement pawls 51 in a part of the angular range φ1 in the outer periphery, as can be seen from FIG. , 51, 51,... At an equiangular interval α (where α = φ1 / N1), and an engagement pawl missing region 53 lacking pawl 51 in the remaining angular range φ2. Have Here, assuming that the pawls 51 are arranged at equal intervals α, the angle range φ2 of the engagement pawl missing region 53 is N2 pawls 51 (where N2 = φ2 / α, and N2 is an integer) (It does not have to be) This is a region having a spread. In the illustrated example, N1 = 8 and N2 = 4.

  The engagement pawl 51 of the pawl wheel portion 50 of the second solar wheel 40 can be engaged with the engagement pawl 73 of the pawl wheel portion 72 of the winding wheel 70, and the engagement pawl 51 of the second solar wheel 40 is wound. When the second solar wheel 40 is rotated in the directions E1 and E2 within a range where the wheel 70 is engaged with the engagement pawl 73, the winding mark wheel 70 is rotated in the directions A1 and A2 in accordance with the rotation. On the other hand, the second solar wheel 40 is rotated in the E1 and E2 directions in an angular range in which the engagement claw missing region 53 of the second wheel 50 of the second sun wheel 40 faces the pinion wheel 72 of the winding mark wheel 70. Even so, the rotation of the second solar wheel 40 is not transmitted to the winding mark wheel 70, and the winding mark wheel 70 is kept stationary.

  When the power reserve display mechanism 2 configured as described above is incorporated into the mechanical wristwatch 1, the engagement region 52 of the second wheel 50 of the second solar wheel 40, the engagement nail region 53 and the winding state of the mainspring 21 are not changed. There are typically two types or forms of association with the rewind state.

  In the following, first, regarding the power reserve display mechanism 2A of the form or aspect in which the engagement pawl lacking region 53 of the pawl wheel 50 of the second solar wheel 40 corresponds to the power reserve amount R of a predetermined time or less, its operation and operation are mainly described. This will be described with reference to FIG.

  In the state S1 in which the mainspring 21 (FIG. 2) is completely rewound, as shown in FIG. 4A, the winding mark wheel 70 has an edge 85 of the fan-shaped opening 81 of the winding mark wheel 70. An initial position that contacts the degree determining pin 82 or a maximum rotation position P1 in the A2 direction is taken. In this state S <b> 1 where the power reserve amount R is zero, the boundary 54 between the engageable region 52 and the disengagement claw missing region 53 of the claw wheel 50 of the second solar wheel 40 is substantially at the engagement claw 73 of the winding mark wheel 70. The facing position (more precisely, a position shifted by 0.5 in the E1 direction) Q1 is taken.

  When the winding wheel 70 is in the position Q1, the power reserve display pointer 76 attached to the winding mark stem 75 indicates the zero position R1 of the power reserve display scale 77 as shown in FIG. ing. At this zero position R1, for example, there is a display of “WIND” that prompts winding.

  In the state S1, when the square hole wheel 24 is rotated in the B1 direction, the barrel box 27 is rotated in the B1 direction, the planetary transmission wheel 90 is rotated in the D1 direction, the planetary intermediate wheel 34 is rotated in the E1 direction, and the planetary wheels 37 and 38 are rotated. Through the E1 direction revolution, the pinion portion (second sun pinion) 41 of the second solar wheel 40 is rotated in the E1 direction, and the pawl wheel 50 of the second solar wheel 40 is rotated in the E1 direction.

  Even if the pawl wheel 50 of the second solar wheel 40 is rotated in the E1 direction in response to the winding of the mainspring 21 from the state S1 in which the power reserve amount R is zero, the engagement pawl missing region 53 remains in the engagement pawl of the winding wheel 70. While facing 73, the rotation of the second solar wheel 40 is not transmitted to the winding mark wheel 70, the winding mark wheel 70 is kept stationary, and the winding mark pointer 76 does not move. It is kept pointing to “WIND”. During this time, as can be seen from FIG. 4A, the jump head 63 of the winding mark jumper 62 is pressed between the engagement claws 73, 73 of the winding wheel 70 by the elastic force of the spring 64. Since the rotation of the car 70 is stopped, there is practically no possibility that an unexpected rotation occurs in the winding mark wheel 70 due to an external impact or the like.

  Winding of the mainspring 21 proceeds, and the mainspring is wound for a duration of about 15 hours, and the pawl wheel 50 of the second solar wheel 40 is rotated by an angle corresponding to 4.5 when viewed by the engaging pawl 52. Then, the state S3 shown in FIG.

  In this state S3, the pawl wheel 50 of the second solar wheel 40 rotated in the E1 direction has a large number (N1 = 8) of engagement pawls 51, 51, 51,. A pivot position Q3 is adopted in which the pawl 51A located at the head in the E1 direction comes into contact with the rear edge 74 of the engagement pawl 73 of the adjacent winding mark wheel 70 at the front edge 55.

  From this point onward, the engagement pawls 51, 51 of the engageable region 52 according to the E1 direction rotation of the pawl wheel 50 of the second sun wheel 40 accompanying the B1 direction rotation of the square hole wheel 24 and barrel barrel 27. Are sequentially engaged with the engagement claws 73, 73,... Of the winding mark wheel 70, and the winding mark wheel 70 is rotated at a constant speed in the A1 direction. As a result, as indicated by an arrow A1 in FIG. 4D, the pointer 76 is rotated at a constant speed in the A1 direction.

  As shown in FIG. 4 (e), the winding mark determining pin 82 is rotated by the winding mark determining pin 82 in the A1 direction rotation of the winding wheel 70 as the winding of the mainspring 21 in accordance with the rotation of the square hole wheel 24 in the B1 direction. This is performed until the position P2 is reached, which contacts the side edge 84 of the fan-shaped opening 81. When the winding wheel 70 is in the position P2, the pawl wheel 50 of the second solar wheel 40 has a large number (N1 = 8) of engagement pawls 51, 51, 51,. A rotation position Q2 is adopted in which the engagement pawl 51B located at the rearmost end in the E1 direction comes into contact with the rear edge 74 of the engagement pawl 73 of the adjacent winding mark wheel 70 at the front edge 55. On the other hand, when the winding wheel 70 takes the position P2, as shown in FIG. 4F, the pointer 76 swings in the A1 direction to the maximum position R2 of the scale 77, and the winding of the mainspring 21 is completed. Show. This maximum position R2 is displayed as, for example, “FULL” to indicate full winding.

  When the full winding state S2 is reached, the mainspring 21 is slip-rotated in the B1 direction with respect to the barrel 22 even if more B1 direction winding torque is applied to the square hole wheel 24. Accordingly, even if the barrel 23 and barrel 27 are rotated in the B1 direction and the first planetary transmission wheel 91 and the planetary transmission wheel 93 are rotated in the D1 direction, the winding wheel 70 is rotated by the winding degree determining pin 82. Since it is prohibited, the rotation of the second planet transmission wheel 92 is prohibited by the planetary gear mechanism 30, so that the second planet transmission wheel 92 slips and rotates with respect to the planet transmission truth 93.

  As described above, in the power reserve display mechanism 2A shown in FIGS. 4A to 4F, the state S1 in which the mainspring 21 is completely rewound and the state S2 in which the mainspring 21 is wound for 15 hours, In between, when the pointer 76 stays at the initial position R1 and the mainspring 21 is wound for 15 hours or more, the winding indicator pointer 76 is rotated in the A1 direction in proportion to the remaining amount of the mainspring 21, that is, the increment of the power reserve amount R, A state in which the power reserve amount R is between 15 hours and 40 hours is displayed using the entire area of the fan-shaped scale 77.

  In the rewinding of the mainspring 21, the B1 direction rotation of the barrel wheel 22 and the barrel box 26 is performed in the E2 direction of the first solar wheel 31 and the planetary wheel 37 instead of the B1 direction rotation of the square hole wheel 24 and barrel barrel 27. , 38 is transmitted to the second solar wheel 40 through rotation, and the second solar wheel 40 is rotated in the E2 direction, which is different from the winding process.

  Therefore, hereinafter, the case where the mainspring 21 is rewound during the operation of the mechanical timepiece 1 will be described with reference to FIGS. 4A to 4F showing the winding process in consideration of the above difference.

  When the mainspring 21 starts to be rewound from the fully wound state S2 shown in FIGS. 4E and 4F, the pawl wheel 50 of the second solar wheel 40 is moved according to the B1 direction rotation of the barrel 26. It is rotated in the E2 direction. At this time, the engagement pawl 51 in the engageable region 52 of the pawl wheel 50 rotates the winding mark wheel 70 in the A2 direction from the full winding position P2. As the winding wheel 70 rotates in the A2 direction, the winding mark pointer 76 swings in the A2 direction, and the power reserve amount R that decreases is displayed.

  When the mainspring 21 is further rewound and the remaining amount of the mainspring, that is, the power reserve amount R reaches 15 hours, as shown in FIG. 4 (c), the mainspring 21 reaches the side edge 85 of the opening 81 of the winding wheel 70. When the winding mark determining pin 82 comes into contact, further A2 rotation of the winding wheel 70 is prohibited, and the pointer 76 returns to the initial position R1 of the display scale 77 as shown in FIG. Remaining amount R decreases and the necessity of winding “WIND” is conveyed. At this time, the engagement of the engagement region 52 of the second wheel 50 with the engagement wheel 52 and the engagement wheel 73 of the winding wheel 70 ends, and the engagement wheel missing region of the rotation wheel 50 of the second solar wheel 40 ends. 53 comes to face the engagement pawl 73 of the winding mark wheel 70. 4C shows the winding process, so that the positional relationship between the engaging pawl 51 and the engaging pawl 73 in the unwinding process (engagement between the front and rear edges of the engaging pawls 51 and 73). (State) does not correspond exactly.

  When the mainspring 21 is rewound thereafter, the pawl wheel 50 of the second solar wheel 40 rotates in the A2 direction and returns to the initial position Q1 in accordance with the B1 direction rotation of the barrel 26. On the other hand, since the rotation of the pawl wheel 50 is not transmitted to the winding mark wheel 70, the winding mark wheel 70 and the pointer 76 are maintained at the initial position P1.

  In the power reserve display mechanism 2A, when the power reserve amount R is about 15 hours or less, the pointer 76 is at the initial position P1 for prompting “WIND”, so that it is easy and reliable to wind the mainspring 21. The mainspring 21 can be wound up. Further, in the power reserve display mechanism 2A, the display area when the power reserve amount R is 20 hours (half of the maximum power reserve time) or less is minimized, and the power reserve amount R is 20 hours (maximum power reserve time). The power reserve amount when the power reserve amount R is relatively sufficient (for example, 20 hours or more) since the display area between the half of the current time and the maximum power reserve time is expanded to the maximum extent. R can be displayed and viewed with high accuracy.

  In the mechanical timepiece 1, generally, in a high power reserve amount region where the power reserve amount R is about half or more of the maximum amount, the rate is small and timekeeping / hand movement can be accurately performed. In the power reserve display mechanism 2A, the movement of the winding mark pointer 76 is enlarged and displayed with high accuracy, particularly in the high power reserve amount region where the timepiece 1 is accurately operated. Therefore, the user can know the power reserve amount R in a predetermined high region and the timing at which the mainspring 21 needs to be wound reliably and accurately with a margin using this enlarged display. As a result, the power reserve amount R of the timepiece 1 can be surely kept above an appropriate level in order to maintain the accuracy of the timepiece 1.

  If desired, the engagement pawl missing region 53 may correspond to a region where the power reserve amount R is large instead of corresponding to a region where the power reserve amount R is small. Such a power reserve display mechanism 2B will be described with reference to FIGS.

  The power reserve display mechanism 2B shown in FIGS. 5A to 5F has an engagement area 52 and an engagement claw missing area 53 of the pawl wheel 50 of the second solar wheel 40 and a fan shape of the winding mark wheel 70. The position of the opening 81 corresponds to the engageable region 52 and the disengagement claw missing region 53 of the claw wheel 50 of the second sun wheel 40 of the power reserve display mechanism 2A shown in FIGS. Except for the point different from the position of the fan-shaped opening 81 of the car 70, it is configured similarly to the power reserve display mechanism 2A.

  In the power reserve display mechanism 2B, as can be seen from FIG. 5 (a), when the mainspring 21 is completely rewound and the power reserve amount R is in the state SB1 of 0 (zero), the second solar wheel 40 is a pawl wheel. The second engagement pawl 51 in the E1 direction in the 50 engageable areas 52 is in the state QB1 engaged with the engagement pawl 73 of the winding wheel 70, and the A1 direction among the fan-shaped openings 81 of the winding wheel 70 It is in the position PB1 where the winding determination pin 82 is in contact with the side edge 85 of the end. On the other hand, as can be seen from FIG. 5B, in this state SB1, the indicator pointer 76 is at the initial position RB1, the mainspring 21 is completely rewound, and the power reserve amount (mainspring remaining amount or mainspring duration) is reached. Indicates that R is 0, that is, empty “EMPTY”.

  In the power reserve display mechanism 2B, when the mainspring 21 is wound up by rotating the square hole wheel 24 integral with the barrel 27 from the state SB1 where the power reserve amount R is 0, the second solar wheel is wound up. As the E40 rotates in the E1 direction, the engagement claw 51 in the engageable region 52 of the claw wheel 50 is sequentially engaged with the engagement claw 73 of the winding mark wheel 70 to rotate the winding mark wheel 70 in the A1 direction. When the power reserve amount R reaches a state SB2 that reaches 20 hours due to the winding of the mainspring 21, as shown in FIG. 5C, E1 in the engageable region 52 of the second wheel 50 of the second solar wheel 40. The state QB3 in which the engagement pawl 51 at the end of the direction is engaged with the engagement pawl 73 of the winding wheel 70 is taken. At this time, the winding mark wheel 70 is rotating in the A1 direction, and as shown in FIG. 5 (d), the winding mark pointer 76 indicates that the power reserve amount R is 20 hours. This indicates a position RB3 of “20H” on the scale 77B. On the other hand, in this state SB3, as can be seen from FIG. 5C, the winding determination pin 82 takes a position PB3 in the vicinity of the side edge 84 on the rear side of the opening 81 in the A1 direction.

  In the power reserve display mechanism 2B, when the mainspring 21 is further wound by further rotating the square hole wheel 24 in the B1 direction from the state SB3 in which the power reserve amount R is 20 hours, the pawl wheel 50 of the second solar wheel 40 is obtained. The engagement pawl 51 at the end of the engageable region 52 engages with the engagement pawl 73 of the winding mark wheel 70 to slightly rotate the winding mark wheel 70 in the A1 direction. Accordingly, as shown in FIG. 5F, the pointer 76 points to the maximum position RB2 of the scale 77B. This position RB2 has “min24H” and “max40H” displayed at the maximum position RB2 to indicate that the power reserve amount R has reached about 24 hours. At this time, the winding mark wheel 70 takes a position PB2 where the winding degree determination pin 82 just contacts the side edge 84 of the winding mark wheel 70 as shown in FIG.

  In the power reserve display mechanism 2B, when the mainspring 21 is wound up by further rotating the square hole wheel 24 in the B1 direction, the pawl wheel 50 of the second solar wheel 40 further rotates in the A1 direction. However, in this state, the engagement claw lacking region 53 of the claw wheel 50 is in a region facing the engagement claw 73 of the winding wheel 70, so that the rotation of the claw wheel 50 is not transmitted to the winding wheel 70. On the other hand, the winding mark wheel 70 is held at rest by being restrained by the jumper 62 since the jumping claw or jumping head 63 of the jumper 62 is engaged between the engagement claws 73, 73. . This state continues until the mainspring 21 is fully wound. In the state SB2 of the maximum power reserve amount R in which the mainspring 21 is wound up to the maximum extent, the pawl wheel 50 of the second solar wheel 40 moves to the end of the engagement pawl missing region 53 as shown in FIG. That is, the rotational position QB2 is employed in which the first engagement pawl 51 of the engageable region 52 is practically engaged with the rear edge of the engagement pawl 73 of the winding wheel 70 at its front edge.

  When the mainspring 21 is excessively wound, the slip rotation occurs at the planetary transmission wheel 90 as in the case of the power reserve mechanism 2A.

  In this fully wound state SB3, the engagement pawl 51 of the pawl wheel 50 of the second solar wheel 40 is engaged with the front edge of the engagement pawl 73 of the winding mark wheel 70 at the A2 direction at the rear edge of the E2 direction. Therefore, even if the winding mark wheel 70 attempts to rotate in the A2 direction by overcoming the leap force of the winding mark jumper 62, the A2 direction rotation of the winding mark wheel 70 is engaged with the pawl wheel 50 of the second solar wheel 40. It can be blocked by the pawl 51. Further, in the fully wound state SB3, a position where the engagement pawl 51 of the pawl wheel 50 of the second solar wheel 40 is engaged with the front edge of the engagement pawl 73 of the winding mark wheel 70 on the A2 direction at the rear edge of the E2 direction. Therefore, if the engagement missing area 53 of the pawl wheel 50 of the second solar wheel 40 is in the area facing the engagement pawl 73 of the winding mark wheel 70, the winding mark wheel 70 is connected to the winding mark jumper 62. Even when the jumping force is overcome and the jumping head 63 of the jumper 62 is slightly rotated in the A2 direction and is caught near the top of the engaging pawl 73, the engaging pawl 51 is fully wound. Pushes the engagement pawl 73 in the A1 direction, so that the deviation of the winding mark pointer 76 can be corrected.

  In the case of rewinding the mainspring 21, a process opposite to the above is taken. That is, until the power reserve amount R decreases from 40 hours to about 24 hours, the pawl wheel 50 of the second solar wheel 40 is simply rotated in the A2 direction, and the winding wheel 70 is stationary at the position PB2. To be kept. When the mainspring 21 is further rewound, the A2 direction rotation of the winding mark wheel 70 by the engagement pawl 51 of the pawl wheel 50 of the second solar wheel 40 rotating in the E2 direction is started, and the power reserve amount R becomes 20 hours. Then, the process returns to the state SB2 shown in (c) and (d) of FIG. It should be noted that the strict engagement relationship between the engagement pawls 51 and 73 at the time of rewinding is slightly different from FIG. 5C showing the engagement position of the engagement pawls 51 and 73 at the time of winding. This is the same as in the case of FIG. When the winding of the mainspring 21 further proceeds, the A2 direction rotation of the winding wheel 70 by the engagement pawl 51 of the pawl wheel 50 of the second solar wheel 40 rotating in the E2 direction proceeds, and the power reserve amount R becomes zero. The process returns to the initial state SB1 shown in FIGS.

  In this power reserve display mechanism 2B, since the state where the power reserve amount R is small is displayed using the whole or most of the area of the scale 77, the state where the power reserve amount R is small is enlarged and displayed. Therefore, even if the maximum power reserve amount R is large, the mainspring 21 can be rewound and the state where the power reserve amount R is small can be displayed and visually recognized with high accuracy, and the power reserve amount R can be recognized accurately. When the mechanical timepiece 1 is used and when the hand movement of the mechanical timepiece 1 stops, it is easy to tell the user that the stop is due to the actual complete rewinding of the mainspring 21.

  In the power reserve display mechanism 2A, for example, instead of enlarging the area of the power reserve amount R of 15 to 20 hours and 20 to 40 hours, for example, the power reserve amount of 0 to about 5 hours and about 20 to 40 hours The area of R may be enlarged and displayed so that the power reserve amount R approaches zero. In the graph of FIG. 6A schematically showing the relationship between the power reserve amount R and the display thereof, the display pattern of the power reserve display mechanism 2A indicated by a thick solid line FA1 is indicated by an imaginary line GA1. The display pattern will be changed. Such a change may be performed by moving one engagement claw 51 on one end side of the engageable region 52 of the engagement claw 51 of the claw wheel 50 to a region opposite to the engagement claw missing region 53 ( Actually, it is only necessary to rotate the pawl wheel 50 relative to the E2 direction by one pawl).

  Further, in the power reserve display mechanism 2B, for example, instead of enlarging and displaying the region of the power reserve amount R of 0 to 20 hours and 20 to about 24 hours, for example, 0 to about 20 hours and about 36 to 40 hours The area of the power reserve amount R may be enlarged and displayed so that the power reserve amount R approaches zero. In the graph of FIG. 6B schematically showing the relationship between the power reserve amount R and the display thereof, the display pattern of the power reserve display mechanism 2B indicated by the thick solid line FB1 is indicated by an imaginary line GB1. The display pattern will be changed. Such a change may also be performed by moving one engagement claw 51 on one end side of the engageable area 52 in the engagement claw 51 of the claw wheel 50 on the opposite side of the engagement claw missing area 53 (actually). In this case, the pawl wheel 50 may be relatively rotated in the direction E1 by one pawl).

  In addition, in the power reserve display mechanism 2, instead of magnifying and displaying a region where the power reserve amount R is small or large as in the power reserve display mechanism 2A or 2B, the power reserve amount R is an intermediate region (as shown in the figure). When the maximum power reserve amount is 40 hours, for example, an area of 10 to 30 hours) may be enlarged and displayed.

  Moreover, although the case where the maximum power reserve amount R is 40 hours has been described above, the maximum power reserve amount R may be about 50 hours or more. Further, the relative ratio φ1 / φ2 of the angle range φ1 of the engageable region 52 and the angle range φ2 of the engagement pawl missing region 53 may be larger or smaller than this example.

  In the above description, the power reserve amount R is linearly displayed in the range where the scale 77 can display the fluctuation of the power reserve amount R, but may be non-linear. In that case, the engagement pawls 51 of the pawl wheel 50 of the second solar wheel 40 may be arranged at unequal intervals.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory plan view partially showing a mechanical timepiece having a power reserve display mechanism according to a preferred embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional explanatory diagram of the mechanical timepiece of FIG. 1. FIG. 2 is an explanatory plan view illustrating an enlarged part of a power reserve display mechanism of the mechanical timepiece of FIG. 1. 1 shows a power reserve display mechanism of one aspect of the present invention in which a power reserve amount high (large) region is displayed with high accuracy in the power reserve display mechanism of FIG. FIG. 6 is an explanatory plan view showing the arrangement of the train wheel in a state of being unwound, FIG. 9B is an explanatory plan view showing the display state of the display pointer in the state (a) in (b), and FIG. Plane explanatory diagram showing the arrangement of the train wheel in a wound state, Plane explanatory diagram showing the display state of the display pointer in the state (c) of (d), (e) is a state in which the mainspring is completely wound up The plane explanatory view which showed arrangement | positioning of the wheel train of this, The plane explanatory drawing which showed the display state of the display pointer in the state of (e) of (f). 1 shows a power reserve display mechanism according to an embodiment of the present invention in which a power reserve amount low (small) region is displayed with high accuracy in the power reserve display mechanism of FIG. FIG. 4 is an explanatory plan view showing the arrangement of the train wheel in a state of being unwound, FIG. 5B is an explanatory plan view showing the display state of the display pointer in the state (a) in FIG. 5B, and FIG. FIG. 6 is an explanatory plan view showing the arrangement of the train wheel in a state in which the mainspring is in a state; FIG. 9D is an explanatory plan view showing the display state of the display pointer in the state shown in FIG. An explanatory plan view showing the arrangement of the train wheel, and an explanatory plan view showing a display state of the display pointer in the state (e) of (f). The relationship between the power reserve amount and its display is schematically shown. (A) is a graph schematically showing the display pattern in the power reserve display mechanism of FIG. FIG. 6B is a graph schematically showing a display pattern in the power reserve display mechanism of FIG. 5 and a display pattern of a modified example thereof.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Mechanical type clock 2,2A, 2B Power reserve display mechanism 10 Main plate 12 Second main plate 14 First receiver 16 Rotating weight 18 Second wheel train receiver 20 Incense box 21 Mainspring 22 Incense box wheel 23 Incense box true 24 Square hole wheel 25 Incense box gear 26 Incense box kana 27 Incense box kana 30 planetary gear mechanism 31 first sun wheel 32 first sun gear 33 first sun kana 34 planetary intermediate wheel 35 disk-shaped main body 36 planetary intermediate gear 37 first planetary wheel 38 second planetary wheel 40 Second sun wheel 41 Second sun pinion 50 Claw wheel 51, 73 Engagement claw 52 Engageable area 53 Engagement claw missing area 54 Boundary 60 between engageable area and engagement claw missing area Roll marking display mechanism 62 Winding jumper 63 Jumping head 64 Spring portion 70 Winding wheel 71 Disc-shaped main body 72 Pawl wheel portion 76 Power reserve display pointers 77 and 77B Power reserve display scale 80 Rotation range regulation mechanism 8 Fan-shaped opening 82 Winding degree determining pins 84, 85 Side edge 90 Planet transmission wheel 91 First planet transmission wheel 92 Second planet transmission wheel 93 Planet transmission true A1, A2, B1, B2, D1, D2, E1, E2 Rotation direction C1 , C2, C3, C4, C5 Center axis lines P1, P2, PB1, PB2, PB3 Rotating position Q1, Q2, Q3, QB1, QB2, QB3 Winding wheel Rotating position R of second solar wheel R Power reserve amount (Mainspring (rewind) duration)
R1, R2, RB1, RB2, RB3
S1, S2, SB1, SB2, SB3 Power reserve display mechanism state α Angle interval φ1, φ2 Angle range

Claims (10)

A first wheel which is rotated in one direction in response to winding of the mainspring of the watch and is rotated in the opposite direction in response to rewinding of the mainspring, and having a plurality of engaging claws on the outer periphery at irregular intervals; ,
A second vehicle that displaces the power reserve amount display means in one direction when rotated in one direction and displaces the power reserve amount display means in the opposite direction when rotated in the opposite direction; A power reserve display mechanism comprising: a plurality of engagement claws that can be engaged with the plurality of engagement claws of a vehicle at equal intervals. The first wheel has a plurality of first engagement pawls at equal intervals in a part of the angular range of the outer periphery and a second plurality of engagement pawls in another part of the angular range. When the engagement claw missing region of the first vehicle faces the engagement claw of the second vehicle, the rotation from the first vehicle to the second vehicle is provided. The power reserve display mechanism according to claim 1, wherein transmission of is prohibited. 3. The power reserve display mechanism according to claim 2, wherein when the power reserve amount is equal to or lower than a predetermined level, the engagement claw lacking region faces the engagement claw of the second vehicle. 3. The power reserve display mechanism according to claim 2, wherein when the amount of power reserve is equal to or higher than a predetermined level, the engagement claw lacking region is configured to face the engagement claw of the second vehicle. The power reserve display mechanism according to any one of claims 1 to 4, further comprising a jumper for controlling the rotation of the second vehicle. The power reserve display mechanism according to any one of claims 1 to 5, further comprising a rotation range restricting means for restricting a rotatable range of the second vehicle. The power reserve display mechanism according to any one of claims 1 to 6, wherein the second vehicle is a winding wheel. The power reserve display mechanism according to claim 7, further comprising a planetary gear mechanism, wherein the first vehicle is a last-stage vehicle of the planetary gear mechanism. The power reserve display mechanism according to any one of claims 1 to 8, wherein when the mainspring is fully wound, the first wheel is provided with an engagement claw that restricts rotation of the second wheel. A mechanical timepiece comprising the power reserve display mechanism according to any one of claims 1 to 9.

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