JP2010145160A - Day wheel device and analogue watch having the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a day wheel device including a day wheel that is stably rotated and positioned even if a number of notches at a bottom board is increased, and to provide an analogue watch having the same. <P>SOLUTION: The day wheel device 3 of the analogue watch 1 includes the day wheel 40 containing a flange 43 having a ring shaped section 41 and a date display 42 and a day gear 46 formed along an inner circumference surface 44 of the ring shaped section 41, the bottom board 30 containing a first guide projection 31 that has a notch 34 formed at a part of an outer peripheral edge and is fitted to the day gear 46 so as to guide the rotation of the day wheel, and a day wheel guide member 80 having a second guide projection 82 that is fitted to the ring shaped section of the day wheel 40 so as to guide the rotation of the day wheel. The day wheel guide member has a guide 88 that regulates a position of the inner circumference surface 44 of the ring shaped section of the day wheel 40 in a region where the second guide projection is superposed with an arrangement notch 35b forming at least a part of the notch 34 at the outer peripheral edge of the first guide projection 31 in a thickness direction of the watch 1. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a date dial device and an analog timepiece including the date dial device.

  An annular portion, a flange portion having a date display portion extending radially outward with respect to the annular portion, and a large number of internal teeth formed along the inner peripheral surface of the annular portion on one end side of the annular portion A date indicator device including a date wheel having a date gear portion and an analog timepiece including the date indicator device are well known (for example, Patent Document 1).

  In the date dial device of the analog timepiece, a guide projection for fitting the inner teeth of the date dial is formed on the main plate, and the date dial is guided by the guide projection of the main plate and rotates.

  On the other hand, in an analog timepiece, in order to place a train wheel other than the train wheel directly related to the time display, a notch is formed in a part of the guide projection, and at least a vehicle constituting another train wheel in the notch. Part is placed. And when it is going to add various functions and a display to an analog clock, it is hard to avoid such a notch part increasing.

  In particular, in the mechanical analog timepiece described in Patent Document 1, when the winding stem is in various drawer positions including the normal hand movement position, another wheel train can be rotated according to the rotation of the winding stem. Various wheel trains are arranged in the vicinity of the winding stem, and it is difficult to avoid an increase in the number of notches as described above.

  When the number and area of such notches increase, the center of the circle circumscribing the outer peripheral edge of the guide projection of the main plate defined by the area other than the notches deviates from the original center of rotation of the date indicator. It is hard to avoid the size of the.

  For example, in a mechanical analog timepiece having a wheel train arrangement as disclosed in Patent Document 1, a winding wheel train as disclosed in Patent Document 2, for example, is added, and the winding stem in the normal hand movement position is turned to wind the mainspring. If it is going to be possible to perform this, in addition to the wheel train for correcting the date, it is necessary to arrange the train wheel for winding) in the vicinity of the winding stem. For example, one of these two types of train wheels The rear of the date wheel must be used as the location of the cars that make up the train wheel. In such a case, due to the arrangement of the vehicles constituting the one wheel train, the cutout portion of the outer peripheral edge of the guide projection on the main plate must be increased or expanded.

  In particular, the jumping claw portion of the date jumper that engages with the inner teeth of the date dial and controls the date dial connects the position where the date jumper engages with the inner teeth of the date dial and the rotation center of the date dial. When the notch is located around the diametrically opposite position where the extension of the imaginary line intersects with the internal teeth of the date dial, the date indicator should be positioned according to the leap force of the leap control claw portion of the date jumper from the original rotation center. Due to the deviation, the rotation position where the date wheel is regulated by the date jumper is displaced from the original rotation position and should be displayed at the present time in the date display part of the flange part of the date wheel. There is a high possibility that the date (date characters) is partially shifted from the date window (date display window) of the dial plate or the difference is increased.

The date dial holder itself is well known (for example, Patent Document 1). However, the conventional date indicator holder well known in Patent Document 1 or the like restricts the date wheel from being displaced in the thickness direction of the watch, and restricts the position of the date wheel within its extending surface. It wasn't.
Japanese Patent No. 3081992 JP 2006-258895 A

  The present invention has been made in view of the above-described points, and an object of the present invention is to make it difficult to position the date dial with only the guide protrusions of the main plate as the notches formed in the main plate increase or expand. However, an object of the present invention is to provide a date indicator device and an analog timepiece having the date indicator device in which the date indicator can be stably rotated and positioned.

  In order to achieve the above object, the date dial device of the present invention includes an annular portion, a flange portion having a date display portion extending radially outward with respect to the annular portion, and the annular portion on one end side of the annular portion. A date wheel having a date gear portion provided with a large number of internal teeth formed along the inner peripheral surface of the date wheel, and a first guide for guiding the rotation of the date wheel by fitting in the date gear portion of the date wheel A base plate having a notch at a part of the outer peripheral edge, and a second guide protrusion for fitting the annular portion of the date indicator to guide the rotation of the date indicator. The second guide protrusion is a thickness of a watch relative to the disposition notch that forms at least part of the notch on the outer periphery of the first guide protrusion. In a region overlapping in the direction, the date indicator includes a guide portion that defines the position of the inner peripheral surface of the annular portion.

  In the date indicator device of the present invention, “a first guide protrusion that fits into the date gear portion of the date indicator and guides the rotation of the date indicator, and has a notch portion at a part of the outer peripheral edge. In addition to the “ground plate having”, in particular, a “date indicator guide member provided with a second guide projection for fitting the annular portion of the date indicator to guide the rotation of the date indicator, In a region where the protrusion overlaps in the thickness direction of the timepiece with respect to the arrangement notch that forms at least a part of the outer peripheral notch of the first guide protrusion, the inner peripheral surface of the annular portion of the date indicator Even if it becomes difficult to guide the stable rotation of the date indicator of the date indicator with the increase or expansion of the notch, it becomes difficult to guide the stable rotation of the date indicator of the date indicator. The vehicle guide member enables stable rotation and positioning of the date dial by the second guide protrusion.

  That is, in the date dial device of the present invention, the date gear portion of the date dial hits the first guide projection of the main plate to guide the rotation. Further, in the date indicator device of the present invention, the inner teeth of the date dial fit into the notch portion of the first guide projection portion of the main plate because of the notch portion at the outer peripheral edge of the first guide projection portion of the main plate. The date indicator may be misaligned and the center of the date indicator may deviate from the original center of rotation. However, in the date indicator device of the present invention, the “indicating the rotation of the date indicator by fitting in the annular portion of the date indicator” A date indicator guide member having a second guiding projection for guiding, wherein the second guiding projection is at least a part of a cutout portion on the outer peripheral edge of the first guiding projection. In the region overlapping the notch for the timepiece in the thickness direction of the timepiece, there is provided a guide portion for defining the position of the inner peripheral surface of the annular portion of the date dial, so that it may occur in the date dial. The date indicator guide member is adjusted by the date guide member coming into contact with the annular portion of the date indicator at the second guide projection. It rotated to permit being positioned. In particular, even if the guidance of the date indicator by the main plate is insufficient due to the presence of the notch for placement, “the second guide projection of the date indicator guide member is the outer peripheral edge of the first guide projection. `` There is a guide portion that defines the position of the inner peripheral surface of the annular portion of the date indicator in a region that overlaps in the thickness direction of the watch with respect to the arrangement notch portion that forms at least a part of the notch portion. '' It can be accurately positioned at the set position.

  Therefore, in the date dial device of the present invention, the date indicator rotation can be stably guided so that the date (date character) of the date indicator is located at an appropriate position in the date display window (date window) of the dial.

  Here, the term “base plate” refers to the one that supports the train wheel of an analog timepiece. Usually, not only the one called the main plate but also the second main plate, (N is one or other numbers or letters such as a train wheel) or other “(various) receivers”.

  In the date indicator device of the present invention, typically, the notch for placement includes a wheel train that connects a vehicle located behind the flange portion of the date indicator and a vehicle located inside the date gear portion of the date indicator. It constitutes a part of a recess allowing the vehicle to be configured.

  In this case, since it can be used for the arrangement of the train wheel to the back of the flange portion forming the date display portion of the date indicator, not only can the functions incorporated in the watch be enriched, but the train wheel can be arranged in a wide range. The watch can be made thinner. .

  In the date indicator device of the present invention, typically, the train wheel is a train wheel other than the train wheel directly related to the time display.

  In this case, a multi-function watch can be achieved by incorporating a train wheel that is not directly related to the time display.

  In the date indicator device of the present invention, the train wheel is, for example, a train wheel for date correction.

  In this case, for example, it becomes easy to arrange the date correction train wheel while avoiding the train wheel related to the winding of the mainspring.

  In the date indicator device of the present invention, typically, the arrangement notch portion of the first guiding projection is positioned in the vicinity of the winding stem extension region.

  In this case, when various functions (for example, functions that the watch should have when the winding stem is rotated at the normal hand movement position or at one or a plurality of withdrawal positions) according to the operation of the winding stem, As a result, multiple types of wheel trains are arranged in the vicinity of the winding stem, and it is difficult to avoid an increase or expansion of the notch formed in the first guide projection on the main plate. Even in such a case, stable rotation of the date dial can be ensured. In other words, it is possible to arrange many types of wheel trains in a specific region (for example, near the winding stem) without worrying about the possibility of stable rotation of the date dial.

  In the date indicator device of the present invention, typically, the date indicator guide member is a date indicator holder.

  In this case, an indispensable date indicator holder itself in relation to the date indicator can function as the date indicator guide member. However, if desired, the date indicator guide member may be other than the date indicator holder.

  In the date indicator device of the present invention, typically, the date indicator device has a date jumper that engages with the inner teeth of the date indicator and controls the date indicator, and for the second guide of the date indicator guide member. An extension of an imaginary line connecting the position where the guide portion of the protrusion, the jumping claw portion of the date jumper engages with the internal teeth of the date gear portion of the date dial, and the rotation center of the date dial is the date gear of the date dial. It is located near the diametrically opposed position that intersects the part.

  In this case, it is possible to suppress the possibility that the date wheel is greatly decentered at the correct position by the jumping force by the date jumper.

  In the date indicator device of the present invention, typically, in the guide portion of the second guide protrusion of the date indicator guide member, the jumping claw portion of the date jumper engages with the internal teeth of the date indicator. Centering on the position, it is located within a range of about 20 degrees on both sides of the diametrically opposed position.

  In this case, the possibility that the jumping system by the date jumper hinders the smooth rotation of the date dial can be minimized.

  In the date indicator device of the present invention, typically, the second guide protrusion of the date indicator guide member is an arcuate guide portion.

  In this case, it is easy to guide the inner peripheral surface of the annular portion of the date dial. However, the second guiding projection is not a circular arc, but a small recess in the middle of the guiding portion, whether it is a straight line or a circular arc with a center different from the center of the date indicator. Even if there is (can function as an oil reservoir), it may be an elastic piece (for example, a cantilever support spring or a doubly supported spring) instead of the fixed shape part.

  The analog timepiece of the present invention typically includes a date indicator device as described above. The analog timepiece of the present invention is typically a mechanical and self-winding type analog timepiece capable of manually winding the mainspring, and can perform day display and day display as calendar display. However, the day wheel may not be provided, the automatic winding may not be provided, and an electronic timepiece may be used in some cases. In the analog timepiece of the present invention, even if it is difficult to provide stable rotation guidance of the date indicator with the main plate alone due to the increase of the recesses or notches accompanying the increase in the train wheel related to various additional functions, the date of the date indicator is displayed. It can be stably positioned in the date display window.

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

  An analog timepiece 1 according to a preferred embodiment of the present invention includes a movement 2 as shown in FIG. In the movement 2, for example, the hour wheel 11, the minute wheel 12 and the second wheel 13 rotate around the rotation center axis C of the timepiece 1 according to the hand movement related train wheel 5 partially illustrated in FIG. The hour and minute seconds are displayed by the 15 and the second hand 16. Here, the various wheel trains constituting the movement 2 of the timepiece 1 are rotatably supported between support plates such as the main plate 30 and the train wheel bridge.

  The movement 2 also includes a date wheel 40 that can rotate around a central axis C. As shown in FIG. 2 or FIG. 3 and FIGS. 9 to 12, for example, the date indicator 40 includes an annular portion 41 and a date indicator 42 that extends radially outward from the outer periphery of the annular portion 41 and includes a date display portion 42. An envelope connecting the main body portion or the flange portion 43 and 31 inner teeth 45 formed along the inner peripheral surface 44 of the annular portion 41 on the one end 41a side of the annular portion 41 is a first envelope. And a date gear portion 46 forming a circular envelope. The inner peripheral surface 44 of the annular portion 41, that is, the portion without the date gear portion 46 or the inner peripheral surface 44 on the other end 41 b side of the annular portion 41 is desired to form a cylindrical surface B centered on the central axis C. It is formed with dimensional accuracy controlled to be above the level.

  As shown in FIGS. 3 and 6, the hour wheel 11 or hour wheel 11a of the hour wheel 11 is engaged with the date indicator driving wheel 53 through the intermediate date indicator driving wheels 51 and 52, and the hour indicator 11 rotates twice. Each time, the date driving wheel 53 makes one rotation. The date indicator driving wheel 53 includes a date indicator driving claw 54, and each time the date indicator driving wheel 53 is rotated, the date indicator driving claw 54 is engaged with the internal teeth 45 of the date wheel portion 46 of the date indicator 40, The date dial 40 is rotated clockwise by one tooth 45 in the C1 direction.

  The date dial 40 is engaged with the internal teeth 45 of the date gear portion 46 of the date dial 40 at a position of 7 o'clock to 7:30 of the timepiece 1 to leap the date dial 40. A date jumper 55 with 56 is provided. The jumping claw 56 abuts against the adjacent inner teeth 45, 45 of the date wheel 40 at each of the two engaging surfaces 56 a, 56 b defining the claw 56, and against the inner teeth 45, 45. Exert power.

  A winding wheel 22, a chimney wheel 24, and a calendar correction transmission wheel 26 are fitted to the winding stem 20 that can be moved in and out in the G1 and G2 directions and can rotate in the H1 and H2 directions, and a crown 23 and the like are engaged. Yes.

  The movement 2 also includes a winding mechanism 60 for a mainspring (not shown) as shown in FIGS. The hoisting mechanism 60 includes a round hole wheel 62 meshed with the chi-wheel 24 and a round hole transmission wheel 64 meshed with the round hole wheel 62, and directly or indirectly via the round hole transmission wheel 62. (For example, via a rocking round hole wheel (not shown)), meshed with a square hole wheel (not shown) and rotated in the H1 direction of the winding stem 23 at the normal hand movement position P0 pushed in the G2 direction. To wind up the mainspring (not shown).

  The movement 2 further includes a date correction mechanism 70, that is, a rotational position correction mechanism 70 of the date dial 40 as shown in FIGS. 4 and 7. In addition to the calendar correction transmission wheel 26, the date correction mechanism 70 includes a first calendar correction wheel 71 meshed with the calendar correction transmission wheel 26, a second calendar correction wheel 72 meshed with the first calendar correction wheel 71, the first A third calendar correction wheel 73 meshed with the second calendar correction wheel 72; a fourth calendar correction wheel 74 meshed with the third calendar correction wheel 73; a fifth calendar correction wheel 75 meshed with the fourth calendar correction wheel 74; A calendar correction wheel 76 is provided that meshes with the fifth calendar correction wheel 75 and can rotate in the K1 and K2 directions and can swing in the J1 and J2 directions. The calendar correction wheel 76 is loosely fitted in an arc-shaped elongated hole 76b by a shaft 76a and can swing in the J1 and J2 directions along the elongated hole 76b.

  For example, the calendar correction wheel 76 according to the rotation of the wheels 26, 71, 72, 73, 74, and 75 accompanying the rotation of the winding stem 23 in the H2 direction at the one-stage drawing position P1 (FIG. 4) drawn in the G1 direction by one step. When the wheel is rotated in the K1 direction, it is swung in the J1 direction and engaged with the teeth 45 of the date dial 40, thereby rotating the date dial 40 in the C1 direction.

  Next, in the movement 2 of the analog timepiece 1 as described above, the rotation of the date wheel 40, that is, the date feeding mechanism 3 and the date indicator device or calendar mechanism 4 provided with the same will be described in more detail as follows.

  As shown in FIG. 5, the date dial 40 is fitted to the protrusion 31 of the main plate 30 so that the date gear portion 46 is rotatable with respect to the main plate 30. Here, the line connecting the outer peripheral edges 32 of the protrusions 31 as the first guiding protrusions forms a circular envelope as a whole. This envelope forms a circle centered on the central axis C, and its diameter is about the same as the first envelope defined by the date gear portion 46 of the date dial 40 and is larger than the first envelope. Slightly small.

  Since the main plate 30 rotatably supports a large number of wheel trains, the main plate 30 is formed with a large number of recesses that enable placement and support of related wheel trains, and the recesses are partially overlapped and connected. Note that the depth of the concave portion varies depending on the position of the vehicle in the thickness direction of the analog timepiece 1, the thickness of the vehicle, and the like. In any case, in the case of the analog timepiece 1, as shown in FIGS. 3 to 5, a part of the continuous cylindrical peripheral surface 32 of the protrusion 31 is notched at the outer periphery of the protrusion 31. Recesses (notches) 34, 35a1, 35a2, and 35b are formed. Here, the concave portion 34 that extends from 9:30 to 10:00 to 11:00 to 11:30 of the timepiece 1 is a concave portion related to the arrangement of the date indicator driving wheel 53 as shown in FIG. The concave portion 35a1 extending from the range from 2:30 to about 3:30 is a concave portion related to the arrangement of the handwheel 22 and the chichi wheel 24 fitted to the winding stem 20 as shown in FIG. Similarly, as shown in FIG. 4, the recess 35 a 2 that extends in the range from about 3:30 to about 4:30 of the timepiece 1 is a recess related to the arrangement of the calendar correction wheel 76, and about 1:30 of the timepiece 1. The recess 35b serving as a notch for placement extending from about 2:30 to about 2:30 is a recess related to the arrangement of the fourth calendar correction wheel 74 and the third calendar correction wheel 73. Here, as can be seen from FIG. 5, the recesses 35a1 and 35a2 are connected to form the recess 35a, and the recesses 35b and 35a, that is, the recess 35b and the recesses 35a1 and 35a2 are connected together, A recess 35 is formed as follows.

  In the case of the movement 2 of the analog timepiece 1, when the automatic winding type analog timepiece has both the calendar correction mechanism and the manual hoisting mechanism, both mechanisms are arranged around the pinion wheel 22 fitted to the winding stem 20. It becomes difficult to secure a space for disposing the related wheel train, and as shown in FIG. 4, the region R1 behind the flange portion 43 forming the date display portion 42 of the date wheel 40 is used for disposing the related wheel train. As a result, in order to connect the train wheel in the region R1 to the calendar correction wheel 76, the train wheel structures 73 and 74 crossing the lower part of the gear portion 46 of the date wheel 40 are required. For the arrangement of 73 and 74, it is indispensable to form a recess 35b as a placement recess in addition to the recess 35a2.

  As a result, the protrusion 31 of the base plate 30 includes large missing regions (recessed portions) 34 and 35 between the peripheral surface regions 33a and 33b corresponding to the arc regions 32a and 32b at the outer peripheral edge 32 thereof. Here, the concave portion 34 is in the range from 9:30 to 10:00 to 11:30 to 11:30 of the timepiece 1, and the concave portion 35 is in the range from 1:30 to 2:30 to 4:30 of the timepiece 1.

  The timepiece 1 has a date dial holder 80. As shown in FIGS. 1 and 5, the date wheel presser 80 is roughly composed of a disc-like flat plate 81 as a whole as shown in FIGS. The plate 81 has an outer diameter Ba that substantially coincides with the inner peripheral surface 44 of the annular portion 41 of the date dial 40. The disc 81 is composed of a plurality of arc-shaped portions 82a, 82b, 82c, 82d (represented by reference numeral 82 when collectively referred to or when not distinguished from each other), and between the arc-shaped portions 82a, 82b, 82c, 82d. In addition, notches or recesses 83a, 83b, 83c, and 83d (represented by reference numeral 83 when collectively referred to or not distinguished from each other) are formed. The disc 81 has an opening 84 (FIG. 1) in the center and is fixed to the base plate 30 with a set screw 85.

  In the date dial holder 80, the arc-shaped portion 82 as the second guiding projection forms a circle as a whole, and the arc-shaped portion 82 (more specifically, 82a, 82b, 82c, 82d) As can be seen from FIG. 12, the position of the date gear portion 46 in the thickness direction of the timepiece 1 is restricted so that the one surface 86 faces the one surface 46 a of the date gear portion 46 of the date dial 40.

  In particular, in the date dial holder 80, the arc-shaped portion 82 forms a circle as a whole, and the arc-shaped portion 82 (more specifically, 82a, 82b, 82c, 82d) has an outer periphery as shown in FIG. Or an outer peripheral surface 87 (more specifically, 87a, 87b, 87c, 87d, denoted by reference numeral 87 when collectively referred to or not distinguished from each other), facing the inner peripheral surface 44 of the annular portion 41 of the date dial 40. The positional deviation of the peripheral surface 44 is regulated.

  Here, notches or recesses 83 a, 83 b, 83 c, 83 d between the arc-shaped portions 82 a, 82 b, 82 c, 82 d of the date dial holder 80 are provided in the region where the chisel wheel 24 protrudes in relation to the winding stem 20. Except for it, it does not overlap with the concave portions 34 and 35 of the protrusion 31 of the main plate 20. That is, in the circumferential direction region where the concave portions 34 and 35 of the protrusion 31 of the main plate 20 are present and lacks the guiding action, the date dial holder 80 is provided with the outer peripheral surface portions 87a, 87b and 87d of the arcuate portions 82a, 82b and 82d. Thus, the inner peripheral surface 44 of the annular portion 41 of the date dial 40 is guided in the thickness direction of the timepiece 1 (direction parallel to the extending direction of the central axis C).

  The recess 83 can be used as a hole for oiling. The recesses 83b, 83c, and 83d may be omitted.

  The date correction operation in the analog timepiece 1 having the date dial device 4 configured as described above will be described in more detail with reference to FIGS. 13A and 13B and FIGS. 14A and 14B. .

  In the analog timepiece 1, the presence of the wide concave portion 34 and the concave portion 35 includes a date gear portion 46 having a circular envelope having a slightly larger diameter than the circular envelopes of the arc regions 32 a and 32 b of the protrusion 31 of the main plate 30. The date dial 40 can be circumscribed by the arc regions 32a and 32b of the projection 31 of the main plate 30 even at a position slightly deviated from the center C of the arc regions 32a and 32b of the projection 31. When guided only by the arc regions 32a and 32b of the thirty protrusions 31, the positional deviation of the date dial 40 may be difficult to ignore.

  Below, the case where the arcuate portion 82 for guiding the date dial holder 80 is omitted will be described with reference to FIGS. 13 and 14.

  The date dial 40 is regulated by the date jumper 55, and the jumping claw portion 56 of the date jumper 55 is located at the position of approximately 7:30 of the timepiece 1 with the two internal teeth 45, 45 adjacent to the date gear portion 46 of the date dial 40. As shown in FIG. 13A, the date correcting mechanism 70 is operated in a state where the date is pressed in between (the date displayed on the date display portion 42 of the date dial 40 is displayed in the date display window 9). Then, the calendar correction wheel 76 is rotated in the K1 direction, the shaft 76a of the wheel 76 is swung in the J1 direction, and the date wheel portion 46 of the date dial 40 is located at approximately 3:30 to 4 o'clock of the timepiece. Engaged with the teeth 45, a force F1 in the E1 direction is applied to the inner teeth 45. As a result, the date dial 40 starts to rotate clockwise C1.

  As the calendar correction wheel 76 of the date correction mechanism 70 rotates in the K1 direction, the date wheel 40 rotates in the C1 direction while the direction E2 of the force F2 received by the date wheel 40 from the calendar correction wheel 76 changes. As the date indicator 40 rotates in the C1 direction, the jumping claw portion 56 of the date jumper 55 rides on the inner teeth 45 on the upstream side of the date gear portion 46 of the date indicator 40 and reaches the apex of the inner teeth 45 (see FIG. 13 (b)). Even if the date indicator 40 is slightly decentered during the C1 rotation of the date indicator 40 (the center of the date indicator 40 is deviated from the rotation center axis C), as long as the date indicator 40 can be smoothly rotated, Since eccentricity (positional deviation) is not a problem in practice because it is in the middle of date feeding, it is ignored.

  When the jumping claw portion 56 of the date jumper 55 exceeds the apex of the internal teeth 45 of the date gear portion 46 of the date dial 40, the date jumper 55 regardless of whether the calendar correction wheel 76 of the date correction mechanism 70 rotates in the K1 direction. 14 is pushed by the front engagement surface 56a with the force F3 in the E3 direction at the position of approximately 7:30 of the timepiece 1 (FIG. 14A). ).

  On the other hand, from a certain regulation state U1 (FIG. 13 (a)) in which the jumping claw portion 56 of the date jumper 55 is fitted between the adjacent internal teeth 45, 45 of the date dial 40 to regulate the date dial 40, the jumping claw The date wheel between the time when the portion 56 gets over the inner tooth 45 and fits between the next wheel train inner teeth 45, 45 to reach the next regulation state U2 (FIG. 14B) in which the date wheel 40 is regulated. As the 40 rotates in the C1 direction, one internal tooth 45 of the date gear portion 46 of the date dial 40 reaches the downstream end edge (rear edge) 32a1 of the arcuate guide portion 32a of the main plate 30 ((a) of FIG. 14). After that, it fits into the upstream portion 35b of the wide-angle recess 35 beyond the rear edge 32a1.

  That is, (1) one inner tooth 45 (hereinafter referred to as an inner tooth 45A) of the date dial 40 is an arcuate guide portion of the main plate 30 while the date indicator 40 reaches from the normal state U1 to the next normal state U2. Both the event or the state of exceeding the downstream end edge (rear edge) 32a1 of 32a and (2) jumping claw portion 56 of date jumper 55 getting over the apex of one internal tooth 45 of date wheel 40 When this occurs, the tip 45B1 of the inner tooth 45 (hereinafter referred to as the inner tooth 45B) located downstream of the inner tooth 45A in the F6 direction depends on the force of the jumping claw 56 of the date jumper 55. The date wheel 40 is swung in the W1 direction by being pressed against the arc-shaped portion 32a of the main plate 30 and further using the tip 45B1 as a fulcrum. This swinging moment is such that the extension line V2 of the imaginary line V1 connecting the tip 45B1 of the inner tooth 45B and the center C deviates in the C1 direction from the jumping claw 56 of the date jumper 55, and faces the date wheel 40. Since it intersects with the date gear portion 46, it turns clockwise with respect to the lines V1 and V2 around the portion 45B1. In other words, since the arcuate guide portion 32a of the main plate 30 extends only to the portion 32a1 when viewed in the clockwise direction C1, the internal teeth 45A that have reached the C1 direction beyond the portion 32a1 are swung in the W1 direction. Since the arc guide portion 32a is not supported, the date wheel 40 swings in the W1 direction. When such a swing in the W1 direction occurs, the inner teeth 45 (hereinafter referred to as the inner teeth 45C) located on the upper side (upstream side) in the W1 direction come into contact with the arcuate portion 32b of the main plate 30 at the tip (see FIG. On the other hand, the tips of the inner teeth 45 (hereinafter referred to as the inner teeth 45D) located at the lower side (downstream flow side) in the W1 direction are separated from the arc-shaped portion 32a of the main plate 30 (see FIG. 11). That is, the center of the date dial 40 is deviated from the rotation center C defined by the main plate 30. When the eccentricity occurs, the date on the date display portion 42 of the flange portion 43 of the date dial 40 is changed to the date display window (date window) 9 (the dial (not shown)) of the dial. In the position indicated by the imaginary line in FIG. That is, when the date dial 40 reaches the regulation state U2, the date is shifted from the date display window 9. (In this state U2, the date indicator 40 is pressed against the main plate 30 according to the forces F4 and F5 in which the jumping claw portion 56 of the date jumper 55 pushes the inner teeth 45 and 45 in the E4 and E5 directions.)

  On the other hand, in this analog timepiece 1, the date dial device 4 includes the date dial presser 80 as described above, and the date dial presser 80 particularly lacks a guiding action in the protrusion 31 of the main plate 20. Since the arc-shaped portions 82a, 82b, and 82d of the date dial holder 80 are provided in the regions where the concave portions 34 and 35 are provided and the eccentricity of the date indicator 40 can be regulated by the outer peripheral surface portions 87a, 87b, and 87d, the date indicator 40 is actually used. The date indicator 40 is rotated at a rotational position where the date is displayed in the center of the date display window 9 of the dial (not shown). Can be stopped and positioned.

  That is, the date indicator 40 which has reached the state of FIG. 14A is further rotated in the C1 direction by the K1 direction rotation of the calendar correction wheel 76 and the jumping claw portion 56 of the date jumper 55, and the date indicator of FIG. Even when the inner teeth 45A of the date dial 40 exceed the edge portion 32a1 of the arcuate portion 32a of the main plate 30 when reaching the state U2, the date indicator 40 has a circle of the date indicator holder 80 on the inner peripheral surface 44 of the annular portion 41. The date wheel 40 can be rotated in the C1 direction without actually swinging in the W1 direction because it is supported by hitting the arc-shaped portion 82d of the arc-shaped portion 82. As a result, the center of the date dial 40 can be rotated to C <b> 1 with almost no eccentricity with respect to the rotation center axis C of the main plate 30. Accordingly, when the regulation state U2 of FIG. 14B is reached, the date of the date display portion 42 of the date dial 40 can be appropriately positioned in the date display window 9 of the dial (not shown).

  More specifically, the position of the date wheel portion 46 of the date dial 40 is within an angular range T1 with respect to an imaginary line T that connects the portion S1 that receives the force of the leap control claw portion and the portion S2 that faces the diameter direction. In the date indicator device 4 of the analog timepiece 1, the edge 32a1 of the arcuate portion 32a of the projecting portion 31 of the main plate 30 is located, and there is a placement recess 35b at a position shifted in the C1 direction from the edge 32a1. The arc-shaped portion 82d extends beyond the position where the edge 32a1 is located in the C1 direction (from the portion S2 to at least the angular range T1). A region of the arcuate portion 82d that overlaps the placement concave portion 35 when viewed in the thickness direction of the timepiece 1 functions as a guide portion 88, suppresses the date wheel 40 from being eccentric, and rotates the date wheel 40 stably. And can be positioned at a predetermined position.

  Note that the arc-shaped portion 82 of the date dial holder 80 is not the inner tooth 45 of the date dial 40 (even if the envelope of the tip is circular, there is a recess between the teeth 45, 45 when viewed from its outline). Since the cross section is in contact with the inner peripheral surface 42 of the annular portion 41 and guides the rotation of the date indicator 40 in the C1 direction, the individual arc-shaped portions 82a, 82b, 82c and 82d constituting the arc-shaped portion 82 are interposed. Even if the recesses 83a, 83b, 83c, and 83d are present, the swing of the date indicator 40 due to the presence of the recess 83 can be relatively small. Recesses 34, 35 between the recess 83 of the date dial holder 80 and the arc region 32 (ie, 32a, 32b) of the main plate 30 as viewed in the thickness direction of the analog timepiece 1 (the direction parallel to the extending direction of the central axis C). As long as an angular region Z (FIGS. 5 and 14 (a) and (b) in FIG. 5 and FIG. 14) remains, in the range where the center of the circumscribed circle deviates from the central axis C due to the region Z, eccentricity or misalignment will occur. Although this region Z is narrow, and the region Z has angles T1, T2 (T1, T2 are, for example, on both sides of the imaginary line T connecting the position where the jumping claw 56 of the date jumper 55 is located and the center C, for example, Therefore, the C1 direction rotation of the date dial 40 can be kept stable.

  In this example, the date indicator device 4 has been described as having the date indicator holder 80 having the arc-shaped portion 82 as the second guide protrusion, but the second guide protrusion of the date indicator holder 80 is As long as the position of the inner peripheral surface 44 of the annular portion 41 of the date dial 40 can be regulated, the guide portion may be a straight shape instead of an arc shape, or an arc shape whose center is other than the axial position C. There may be a small concave portion (which can function as an oil reservoir) in the middle, and it may be composed of an elastic piece portion such as a cantilever support spring or a double-support spring.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory plan view of an analog timepiece according to a preferred embodiment of the present invention equipped with a date dial device according to a preferred embodiment of the present invention as viewed from the dial side (however, the dial is removed). FIG. 2 is an explanatory plan view similar to FIG. 1, showing the analog timepiece of FIG. 1 with the date wheel presser removed. FIG. 2 is an explanatory plan view similar to FIG. 1, showing a train wheel mainly related to date turning in the analog timepiece of FIG. 1. FIG. 2 is an explanatory plan view similar to FIG. 1 showing a train wheel mainly related to date correction of the analog timepiece of FIG. 1. About the analog timepiece of FIG. 1, while showing the state of the protrusion related to the guidance of the date wheel on the main plate and the notch of the protrusion, the protrusion related to the guidance of the date wheel of the date wheel holder is shown with an imaginary line. FIG. FIG. 4 is a cross-sectional explanatory view mainly showing the date turning related train wheel of FIG. 3 for the analog timepiece of FIG. 1; Sectional explanatory drawing which mainly showed the date correction related train wheel of FIG. 4 about the analog timepiece of FIG. FIG. 2 is an explanatory cross-sectional view mainly showing a portion near a winding stem including a part of a manually wound related wheel train and a part of a date correction related train wheel of the mainspring of the analog timepiece of FIG. 1. FIG. 6 is a cross-sectional explanatory view taken along the line IX-IX of FIG. 5 showing a jumping state by a date jumper for the analog timepiece of FIG. FIG. 6 is a cross-sectional explanatory view of the analog timepiece of FIG. 1 taken along the line XX of FIG. In the analog timepiece shown in FIG. 1, the date indicator is restrained by the guide protrusion of the date indicator (the state in which the position of the date indicator in the thickness direction of the watch is regulated (however, the inner peripheral surface of the annular portion of the date indicator) Is a sectional explanatory view showing a state that is not strictly guided. FIG. 6 is a cross-sectional explanatory view taken along line XII-XII in FIG. FIG. 1 shows a part of a change in the guidance state of a date dial when date correction is performed in the date dial device of the analog timepiece of FIG. 1, and FIG. FIG. 5B is an explanatory plan view similar to FIG. 5 showing a state in which rotation starts to be applied. FIG. 5B is a diagram illustrating a state in which the tip of the jumping claw portion of the date jumper is exactly at the tip of one internal tooth of the date dial by forced rotation by the date correction wheel FIG. 6 is an explanatory plan view similar to FIG. 5 showing the reached state. 1 shows the remaining part of the change in the guidance state of the date dial when date correction is performed in the date dial device of the analog timepiece of FIG. 1, and FIG. The guide protrusion of the main plate after the tip of the jumping claw portion has passed over the tip of one of the internal teeth of the date indicator and one of the date gear portions of the date indicator is in the vicinity of the winding stem installation region FIG. 5B is an explanatory plan view similar to FIG. 5 showing the state immediately before falling from the front edge of the large concave portion of FIG. 5B. FIG. It fits between the inner tooth and the next inner tooth, and one of the date gear parts of the date dial is from the leading edge of the large recess in the guide projection of the main plate in the vicinity of the winding stem installation region. There is a guide projection in the area that has reached the enlarged recessed area and overlaps the enlarged recessed area of the date wheel holder. Explanatory plan view similar to Figure 5 showing a state that enables (be positioned stably at a predetermined position of the date is date display window) Car misalignment stable rotation of suppressing day vehicles.

Explanation of symbols

1 Analogue watch 2 Movement 3 Date feed mechanism 4 Date indicator device (calendar mechanism)
5 Hand movement related train wheel 9 Day display window (sun window)
11 hour wheel 11a hour gear (cylinder gear)
12-minute wheel 13-second wheel 14 hour hand 15-minute hand 16 second-hand 20 winding stem 22 handwheel 23 kanuki 24 kichi wheel 26 calendar correction transmission wheel 30 ground plate 31 protrusion (first guide protrusion)
32 Outer peripheral edge (cylindrical peripheral surface)
32a, 32b Arc region 34 Recess (notch)
35, 35a, 35a1, 35a2 Concavity (notch)
35b Concave part (arrangement notch)
35c Edge of recess 40 Date indicator 41 Annular portion 41a One end 41b The other end 42 Date display portion 43 Flange portion (date indicator main body portion)
44 Inner peripheral surface 45, 45A, 45B, 45C, 45D Inner teeth 45a, 45B1 Tip 46 Date gear portion 46a One surface 51, 52 Day turning intermediate wheel 53 Day turning wheel 54 Day turning claw 55 Day jumper 56 Jumping claw portion 56a, 56b Engagement surface 60 Hoisting mechanism 62 Round hole wheel 64 Round hole transmission wheel 70 Date correction mechanism (date wheel rotation position correction mechanism)
71 First calendar correction wheel 72 Second calendar correction wheel 73 Third calendar correction wheel 74 Fourth calendar correction wheel 75 Fifth calendar correction wheel 76 Calendar correction wheel 76a Shaft 76b Arc-shaped long hole 80 Date indicator retainer 81 Disc-shaped flat plate (Disc)
82 Arc-shaped part (second guide protrusion)
82a, 82b, 82c, 82d Arc-shaped part 83, 83a, 83b, 83c, 83d Notch (recessed part)
84 Opening 85 Set screw 86 One surface 87, 87a, 87b, 87c, 87d Outer peripheral edge (outer peripheral surface)
88 Guide portion B Cylindrical surface Ba Diameter of cylindrical surface C Rotation center axis E1, E2, E3, E4, E5 direction F1, F2, F3, F4, F5 force C1 Rotation direction (clockwise)
G1, G2 Entry / exit direction H1, H2 Rotation direction J1, J2 Rotation direction K1, K2 Rotation direction P0 Normal hand movement position P1 One-stage withdrawal position Q Rotation direction of date dial R1 Area S1 behind flange portion Part S2 receiving force Part diametrically opposite to part S1 Virtual line T1, T2 Angle range U1, U2 Normal position V1, V2 Virtual line W1 Swing direction Z Angle region

Claims (10)

An annular portion, a flange portion having a date display portion extending radially outward with respect to the annular portion, and a large number of internal teeth formed along the inner peripheral surface of the annular portion on one end side of the annular portion A date wheel having a date gear portion provided;
A ground plane having a first guide projection that fits into the date gear portion of the date dial and guides the rotation of the date dial, and has a notch portion at a part of the outer periphery;
A date indicator guide member provided with a second guide projection that fits in the annular portion of the date dial and guides rotation of the date dial, wherein the second guide projection is a first guide. A guide portion that defines the position of the inner peripheral surface of the annular portion of the date indicator in a region that overlaps in the thickness direction of the timepiece with respect to the arrangement notch that forms at least a part of the notch on the outer peripheral edge of the projection A date indicator device comprising: A part of the concave portion in which the disposition notch portion allows the disposition of a vehicle that forms a train wheel that connects the vehicle located behind the flange portion of the date dial and the vehicle located inside the date gear portion of the date dial. The date indicator device according to claim 1, comprising: The date indicator device according to claim 2, wherein the train wheel is a train wheel other than the train wheel directly related to time display. The date wheel device according to claim 3, wherein the train wheel is a train wheel for date correction. The date indicator device according to any one of claims 1 to 4, wherein the notch for placement of the first guide protrusion is positioned in the vicinity of the winding stem extension region. The date indicator device according to claim 1, wherein the date indicator guide member is a date indicator holder. A date jumper that engages with the inner teeth of the date dial and controls the date dial; and the guide portion of the second guide projection of the date indicator guide member includes a date jumper claw An extension of an imaginary line connecting a position where the portion engages with an internal tooth of a date wheel portion of the date indicator and a rotation center of the date indicator is located near a diametrically opposed position where the date wheel portion of the date indicator intersects. The date indicator device according to any one of items 1 to 6. The guide portions of the second guide protrusion of the date indicator guide member are located on both sides of the diametrically opposed position, centering on the position where the jumping claw portion of the date jumper engages the internal teeth of the date indicator. The date indicator device according to claim 7, which is located within a range of about 20 degrees. The date indicator device according to any one of claims 1 to 8, wherein the second guide protrusion of the date indicator guide member includes an arc guide portion. An analog timepiece comprising the date indicator device according to any one of claims 1 to 9.

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