JP5819180B2 - Calendar mechanism and watch having the same - Google Patents

Description

  The present invention relates to a calendar mechanism and a timepiece having the same.

  As a calendar mechanism, various techniques are known as a technique of a so-called auto-calendar mechanism in which a large month (month of 31st) and a small month (month of 30 days or less) are distinguished and fed to the moon.

  In the auto-calendar mechanism, in the small month other than February, the extra date is sent as an extra day feed from the end of the month (30th) to the beginning of the big month, and the date is sent for two days. However, various mechanisms have been proposed for this purpose, and the position of the engaging portion of the date claw can be changed so that additional date feeding can be performed from the end of the small month to the beginning of the large month. Is also known (Patent Document 1).

  However, in the calendar mechanism of Patent Document 1, the elastic arm portion of the date feeding claw is normally forcedly deformed (days other than the end of a small month) so that only one tooth is fed per day. The load (the load related to the rotation of the train wheel) tends to increase, and the energy loss tends to increase.

  Various proposals have been made to provide a mechanism for turning the date wheel separately from the date feeding claw so that additional date feeding can be performed from the end of the small month to the beginning of the large month. (For example, Patent Document 2 and Patent Document 3).

  However, for example, the calendar mechanism of Patent Document 2 uses a planetary gear mechanism in which the number of teeth is defined so that a predetermined operation can be performed, and it is difficult to avoid an extremely complicated structure. Further, for example, in the calendar mechanism of Patent Document 3, it is necessary to provide a month end feed lever for a small month that is actuated by a month cam in order to rotate the date dial extra.

Japanese Patent No. 2651150 JP 2005-326420 A JP 2009-128119 A

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a calendar mechanism having a new structure capable of avoiding excessive frictional load while avoiding excessive complication of the structure, and a timepiece having the same.

  In order to achieve the above object, the calendar mechanism of the present invention includes a cam follower for detecting a moon and is engaged with an operating lever structure swingably supported on a support substrate of a watch, and a tooth of a date wheel. In addition, it is a date turning claw that feeds the date and is supported by the operating lever structure so that the center of rotation is displaced according to the swinging of the operating lever structure. A cam follower for detecting the small moon of the actuating lever structure so as to change the swing displacement position of the actuating lever structure so that the date-turning claw can perform an additional date feed for one day at the beginning of the month; And an engaging lunar cam.

  According to the calendar mechanism of the present invention, “an operating lever structure that includes a cam follower for detecting a small moon and is swingably supported on a supporting substrate of a watch, and a first month of a large moon from the end of a small moon. And a lunar cam that engages with the cam follower for detecting the small moon of the actuating lever structure in order to change the rocking displacement position of the actuating lever structure in between. During the first month of the month, the swing position of the actuating lever structure can be changed under engagement with the lunar cam. Further, in the calendar mechanism of the present invention, “the operating lever structure is a date turning claw that engages with the teeth of the date dial and feeds the date and the center of rotation is displaced according to the swinging of the operating lever structure”. `` Supported by the body '' is provided, so if the swinging position of the operating lever structure is changed from the end of the small moon to the beginning of the large moon, the operating lever structure is supported accordingly. The rotation center of the rotated date fingernail is displaced, and the date fingernail can perform an additional date feed for one day from the end of the small month to the beginning of the large month. That is, in the calendar mechanism of the present invention, additional date feeding is enabled by changing the position of the rotation center of the date claw between the end of the small month and the beginning of the large month, The additional date feeding does not require an excessively complicated mechanism such as a planetary gear mechanism, but also displaces the rotation center of the date claw so that it is not necessary to elastically deform the date claw. Avoid friction loading.

  In the calendar mechanism of the present invention, typically, the date driving wheel is rotatably supported on the support substrate of the timepiece, and the operating lever structure is configured such that the rotation center of the date driving claw can swing with respect to the rotation center of the date driving wheel. Supported by the body.

  In that case, without affecting the meshing between the gear of the date driving wheel (typically a 24-hour gear such as a date driving gear) and the gear of the clock train wheel (typically a cylindrical gear, for example). Only the rotation center of the date turning claw can be displaced. However, if desired, when displacing the rotation center of the date driving claw, the rotation center of the date driving wheel is displaced while keeping the rotation center of the date driving claw aligned with the rotation center of the date driving claw. The center of rotation may be displaced.

In the calendar mechanism of the present invention, about the month cam,
(1) Even if the small moon is a recess recessed with respect to the cam follower,
(2) The small moon may be a protrusion protruding from the cam follower.

In the calendar mechanism of the present invention,
(1) Even if the monthly cam is divided into 12 equal parts,
(2) The monthly cam may be divided into 24 equal parts.
In addition, as long as it is a multiple of 12, it may be equal to or greater than 36 in some cases.

  For example, if the month cam is divided into 24 equal parts, typically the second half of each small month (the end of the month) is not the whole of the small month, but the second half of each small month or the large month. Compared with the first half and the second half, the concave portion is recessed with respect to the cam follower portion or the convex portion is protruded with respect to the cam follower portion. In that case, the small moon detection part of the operating lever structure also serves as the month end detection part.

  On the other hand, when the month cam is divided into 12 equal parts, the operating lever structure includes a month end detector in addition to the small moon detector, and the date indicator includes a month end groove. In this case, at the end of the small moon, the end-of-month detection unit of the operating lever is fitted into the end-of-month groove of the date indicator to change the position of the rotation center of the date feeding claw.

In the calendar mechanism of the present invention, the actuating lever structure and the lunar cam are between the end of the small moon and the beginning of the large moon.
(1) Even if the date feeding claw is configured to perform an additional date feeding after the normal date feeding with respect to the date wheel,
(2) The date feeding claw may be configured to perform an additional date feeding before the normal date feeding with respect to the date indicator.

  The arrangement of the actuating lever structure can be changed depending on which configuration is adopted.

  In the calendar mechanism of the present invention, the actuating lever structure is typically composed of one rigid lever or a plurality of rigid lever link mechanisms.

  When the lunar cam is divided into 12 equal parts and the lunar cam has a protruding protrusion, the operating lever structure is composed of a link mechanism of a plurality of rigid levers. If desired, the actuating lever structure may comprise a plurality of rigid lever linkages.

  In order to achieve the above object, the timepiece of the present invention typically has the structure as described above.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an explanatory plan view showing an appearance of a timepiece according to a preferred embodiment of the present invention having a calendar mechanism according to a preferred embodiment of the present invention as viewed from the front. In the timepiece of the first preferred embodiment of the present invention having the calendar mechanism of the first preferred embodiment of the present invention, a state in which the date feeding of a large month is started (approximately 22:44 on August 30) is shown. FIG. FIGS. 3A and 3B show a cross section of a part of the timepiece of FIG. 2, where FIG. 3A is a sectional view taken along the line IIIA-IIIA in FIG. 2, and FIG. In the watch of the first embodiment, the top of the jumper claw part of the date jumper is in contact with the top of the tooth of the date wheel near the end of the large moon (approximately 0:00 on August 31). FIG. FIG. 5 is an explanatory plan view showing a state in which date feeding is completed (approximately 0:00 on August 31) immediately after the state of FIG. 4 near the end of the large moon in the timepiece of the first embodiment. In the timepiece of the first embodiment, an explanatory plan view showing a state in which the last date feeding is started at the end of a large month (approximately 22:44 on August 31). In the watch of the first embodiment, at the end of the large month, the top of the jumper claw of the date jumper abuts on the top of the tooth of the date indicator and the top of the jumper claw of the month jumper is the tip of the tooth of the moon star wheel. Plane explanatory drawing which showed the state (about 0:00 on September 1) contact | abutted on the vertex. In the timepiece of the first embodiment, an explanatory plan view showing a state in which the date feeding and the month feeding are completed (approximately 0:00 on September 1) immediately after the state of FIG. . In the watch of the first embodiment, a state in which the day feeding of the small month is started near the end of the month (between the end of the small month and the beginning of the large month) (approximately 22:47 on September 30). FIG. In the watch of the first embodiment, the top of the jumper claw part of the date jumper is in contact with the top of the tooth of the date wheel near the end of the small moon (about 0:05 on October 1). FIG. In the watch of the first embodiment, an explanatory plan view showing a state in which date feeding is completed (approximately 0:05 on October 1) immediately after the state of FIG. 10 near the end of the small moon. In the watch of the first embodiment, a state in which an additional date feed is started at the end of the month (between the end of the small month and the beginning of the large month) after the normal date feed of the small month (October 30th) Plane explanatory view showing about 2:04). In the watch of the first embodiment, at the end of the small moon, the top of the jumper claw of the date jumper abuts on the top of the tooth of the date indicator and the top of the jumper claw of the month jumper is the tip of the tooth of the moon star wheel. Plane explanatory drawing which showed the state which contact | abutted to the vertex (about 3:18 on October 1st). In the watch of the first embodiment, an explanatory plan view showing a state in which the date feeding and the month feeding are completed immediately after the state shown in FIG. 13 at the end of the small month (about 3:18 on October 1). . In the timepiece of the second preferred embodiment of the present invention equipped with the calendar mechanism of the second preferred embodiment of the present invention, a state in which the date feeding of a large month is started (approximately 22:44 on August 31) FIG. The plane explanatory view which showed the state (about 0:00 on September 1) in which the date feeding of the large month and the month feeding were completed in the timepiece of the second embodiment. The plane explanatory view which showed the state (about 22:47 on September 29) which starts the date feed of a small month about the timepiece of 2nd Example. The plane explanatory view which showed the state (about 0:05 on September 30) in which the date feed of the small month was completed about the timepiece of the second example. As for the watch of the second embodiment, a state in which the first date feeding is started as an additional date feeding performed earlier than usual at the end of a small month (about 20:41 on September 30) is shown. Plane explanatory drawing. The plane explanatory view which showed the state (about 21:36 on September 30) that the first date feeding was completed at the end of a small month about the timepiece of the second embodiment. About the timepiece of the second embodiment, an explanatory plan view showing a state in which the second daily feed is started as a normal daily feed at the end of a small month (approximately 22:34 on September 30). The plane explanatory drawing which showed the state (about 23:39 on September 30) of the 2nd date feed and the month feed at the end of the small month about the timepiece of the second embodiment. In the timepiece of the third preferred embodiment of the invention having the calendar mechanism of the third preferred embodiment of the present invention, a state in which the date feeding of a large month is started (approximately 22:44 on August 31) is shown. FIG. In the timepiece of the third embodiment, a plane explanatory view showing the date feeding of a large month and the state in which the month feeding is completed (approximately 0:00 on September 1). The plane explanatory view which showed the state (about 22:47 on September 29) which starts date feeding of a small month about the timepiece of the 3rd example. The plane explanatory view which showed the state (about 0:00 on September 30) in which the date feeding of the small month was completed about the timepiece of the third embodiment. As for the watch of the third embodiment, a state in which the first date feeding is started as an additional date feeding performed earlier than usual at the end of a small month (about 20:41 on September 30) is shown. Plane explanatory drawing. FIG. 10 is an explanatory plan view showing a state in which the first date feeding is completed at the end of a small month (about 21:36 on September 30) for the watch of the third embodiment. About the timepiece of the third embodiment, an explanatory plan view showing a state in which the second daily feed is started as a normal daily feed at the end of a small month (approximately 22:34 on September 30). The plane explanatory drawing which showed the state (about 23:39 on September 30) of the 2nd date feeding and month feeding completed at the end of the small month about the timepiece of the third embodiment. In the watch of the fourth preferred embodiment of the invention having the calendar mechanism of the fourth preferred embodiment of the present invention, a state in which the date feeding of a large month is started (about 22:44 on August 30) is shown. FIG. In the watch of the fifth preferred embodiment of the invention having the calendar mechanism of the fifth preferred embodiment of the present invention, it shows a state in which the date feeding of a large month is started (approximately 22:44 on August 31). FIG. In the timepiece of 5th Example, the plane explanatory drawing which showed the state (about 0:00 on September 1) which completed the day feeding of the big month and the month feeding. About the timepiece of the fifth embodiment, an explanatory plan view showing a state in which the first date feed is started as a normal date feed at the end of a small month (about 22:44 on September 30). FIG. 10 is an explanatory plan view showing a state in which the first date feed is completed at the end of a small month (approximately 0:00 on October 1) at the end of a small month. For the watch of the fifth embodiment, a state in which the second date feed is started as an additional date feed at the end of the small month (between the end of the small month and the beginning of the large month) Plane explanatory view showing about 2:04). About the timepiece of the fifth embodiment, a plane explanatory view showing a state in which the second date feeding and the month feeding are completed at the end of a small month (approximately 3:18 on October 1). In the watch of the sixth preferred embodiment of the present invention having the calendar mechanism of the sixth preferred embodiment of the present invention, a state in which the date feeding of a large month is started (about 22:44 on August 30) is shown. FIG. In the timepiece of the seventh preferred embodiment of the invention having the calendar mechanism of the seventh preferred embodiment of the present invention, it shows a state in which the date feeding of a large month is started (approximately 22:44 on August 30). FIG. In the watch of the eighth preferred embodiment of the invention having the calendar mechanism of the eighth preferred embodiment of the present invention, a state in which the date feeding of a large month is started (approximately 22:44 on August 30) is shown. FIG.

  Several preferred embodiments of the present invention will be described based on preferred examples shown in the accompanying drawings.

  1 to 14 show a timepiece equipped with an auto-calender mechanism 1 as a calendar mechanism according to a preferred embodiment of the present invention, that is, a timepiece 2 with a calendar mechanism.

  The timepiece 2 with a calendar mechanism has an appearance 3 as shown in FIG. That is, the timepiece 2 with a calendar mechanism includes a time display hand 11 including an hour hand 11a, a minute hand 11b, and a second hand 11c so as to be rotatable around the central axis C in a clockwise direction C1. The dial 12 of the timepiece 2 has a typesetting 12a representing the position at the hour, and a month / day display window 13 having a month display area 13a and a day display area 13b. 14 is a watch case, 15 is a crown attached to the winding stem 15a.

  In the example shown in the cross-sectional views of FIGS. 3A and 3B, the hour wheel or hour wheel 16a with the hour hand 11a attached to the tip, the minute wheel 16b with the minute hand 11b attached to the tip, and the second hand 11c at the tip. The second wheel or fourth wheel 16c attached to the wheel 16 is rotatably supported around the center axis C via the center pipe 7b supported by the main plate 6 or the second wheel 7a, and the gear portion of the hour wheel 16a. The cylindrical gear, the minute wheel or second gear of the minute wheel 16b, and the gear portion or fourth gear of the fourth wheel 16c are connected to each other and connected to a driving source (not shown) such as a barrel having a clock spring. It is rotated by a train wheel train including the train wheel.

  As shown in FIG. 2 and FIG. 3 (a), the date driving wheel 30 engaged with the cylindrical gear 17a of the hour wheel 16a directly or via the date turning intermediate wheel by the date turning gear portion 31 has a central axis line. It is rotated around H at a speed of 1 rotation / day in the H1 direction. A date turning pin 32 is erected in a portion of the date turning gear portion 31 that is radially away from the central axis H.

  As shown in FIGS. 2 and 3 (a) and 3 (b), the date indicator 40 is parallel to the axial direction from the large-diameter annular plate date indicator wheel portion 41 and the inner edge of the date indicator wheel portion 41. A large-diameter cylindrical portion 42a extending inward, a small thick flange portion 42b extending radially inward from the lower end of the large-diameter cylindrical portion 42a, and an axial direction from the inner edge of the flange-shaped portion 42b. A small-diameter thick cylindrical portion 42c extending to the inner peripheral edge of the small-diameter thick-walled cylindrical portion 42c, an inner peripheral edge on the lower end side of the small-diameter thick-walled cylindrical portion 42c, and a moon formed on the inner peripheral edge of the large-diameter cylindrical portion 42a. It has a turning claw part or a month feeding tooth part 46 and a month end groove part 48 formed on the upper edge of the thick-walled hook-like part 42b. In addition, in the part which mentions (a) and (b) of FIG. 3 among this specification, "upper" means the side with the time indicator hand 11 unless otherwise specified.

  On the dial side surface 41a of the date display wheel portion 41, letters LD representing 31 dates from 1 to 31 are displayed at equal intervals. The date gear portion 45 includes 31 tooth portions 47 at equal intervals. The C2 direction rotation of the date indicator 40 is regulated by the date jumper 22 including the date jump control claw portion 22a and the date jump control spring portion 22b. As can be seen from FIGS. 3A and 3B, the positional deviation in the thickness direction of the date dial 40 is regulated by the date dial holder 21 attached to the main plate 6 so as to cover the date gear portion 45. .

  The month turning claw portion or month feeding tooth portion 46 of the date indicator 40 rotates the month wheel 60 around the central axis C in the direction C1 via the month turning wheel or month transmission wheel 50.

  As shown in FIG. 2, the month driving wheel 50 is composed of a gear 51 that is rotatable around the central axis J, and the tooth 52 of the gear 51 is engaged with the month turning claw portion or the month feeding tooth portion 46 of the date dial 40. In this case, the tooth portion 46 is rotated in the J1 direction by one tooth. In this example, since the month feeding tooth portion 46 is composed of one tooth portion 46, the month transmission wheel 50 is rotated in the J1 direction by one tooth per month.

  As can be seen from the sectional explanatory views as shown in FIGS. 3A and 3B and the plan explanatory view as shown in FIG. 2, the month wheel or month indicator wheel 60 is loosely fitted to the cylindrical portion 16a1 of the hour wheel 16a. A month indication vehicle guide pipe 61 fixed to the vehicle retainer 21, a moon star wheel or a moon gear 64 which is rotatably fitted to the guide pipe 61 by a hub portion 62 and has 12 teeth 63 on the outer periphery; It has a lunar cam 66 fitted to the lunar star 64 and having a cam surface 65 formed on the outer periphery, and a lunar plate or lunar display plate portion 67 fixed to the lunar gear 64.

  The cam surface 65 of the lunar cam 66 corresponds to a large moon whose month is 31 days (also referred to as “Otsuki” in this specification), and has a large-diameter arc-shaped cam surface or convex shape. A cam surface portion 65a and a small moon cam surface portion 65b in the form of a small-diameter arc-shaped cam surface or a recess corresponding to a small month (also referred to as “small moon” in this specification) whose month is 30 days or less. Have.

  The month gear 64 meshes with the month wheel 50, and is rotated by one tooth every time the month wheel 50 is rotated by one tooth per month, and is rotated once around the center axis C in the direction C1 by one year. The

  On the dial side surface 67a of the month display board portion 67, letters LM representing the months from January to December are displayed one by one (total of 12 letters) at regular intervals. As can be seen from FIGS. 3A and 3B, the month display plate portion 67 has an outer peripheral edge slightly smaller in diameter than the inner peripheral edge of the date display wheel portion 41 of the date indicator 40. Therefore, the letter LM representing the month on the dial side surface 67a of the month display board part 67 is slightly closer to the central axis C than the letter LD representing the day on the dial side surface 41a of the date display wheel part 41. It is displayed as a month and day in predetermined areas 13a and 13b in the month and day display window 13 of the dial 12 (FIG. 1).

  The rotation of the month wheel 60 in the C1 direction is regulated by the month jumper 24 including the month jump control claw portion 24a and the month jump control spring portion 24b. As can be seen from (a) and (b) of FIG. 3, the positional deviation in the thickness direction of the month wheel 60 is applied to the month indicating vehicle guide pipe 61 so as to regulate the displacement of the month star wheel 64 toward the dial side. It is regulated by the attached month indicator holder 23.

  The auto-calendar mechanism 1 has an operating lever 70 in addition to the month cam 66.

  In the example shown in FIG. 3B, the actuating lever 70 is composed of a plate-like body 73 having a desired planar shape, and the A1 and A2 directions around the central axis A via the rotation central axis 25. It is supported by the date indicator holder 21 so as to be freely rotatable. The rotation center shaft 25 is fitted into the hole 21a of the date dial holder 21 at the lower end portion with a small diameter, and is fitted into the hole 70a at the base portion of the operating lever 70 so as to be relatively rotatable at an intermediate portion with a large diameter. Instead, even if the rotation center shaft 25 is fitted in the hole 70a of the operating lever 70 and is rotatably fitted in the hole 21a of the date indicator holder 21, the hole 70a of the operating lever 70 and the date indicator holder 21 Both holes 21a may be rotatably fitted, and instead of the date indicator holder 21, supported by a stationary base plate such as a ground plate or various receivers so as to be rotatable around the central axis A. It may be.

  The actuating lever 70 in the form of a plate-like body 73 that has received the A1 direction biasing force at the spring receiving portion 72 by the actuating lever spring 71 is turned to the tip side that is opposite to the base portion with the hole 70a, and is turned to the claw support portion 74. And a month-end detecting projection portion 76 forming a month-end detecting portion and a month-end detecting projection portion 76 forming a month-end detecting portion are provided on both sides.

  A substantially circular central opening 73a and a long hole 73b are formed in the flat plate-like portion 73 of the operating lever 70. The central opening 73a is loosely fitted to the lunar cam 66. The long hole 73b rotates the lunar jumper 24. It is loosely fitted to the moving shaft portion 24c. As a result, as can be seen from the plan view of FIG. 2, the operation lever 70 is allowed to rotate in the A1 and A2 directions over a wide area including the central axis C of the timepiece.

  In this example, the date-turning claw structure 33 has a flat-plate-shaped date-turning claw main body portion 35 having a date-turning claw portion 34 and a rotating shaft portion 36 erected on the date-turning claw body portion 35. The rotating lever 36 is supported by the date claw support portion 74 of the operating lever 70 so as to be rotatable around the central axis B. In this example, the rotation shaft portion 36 is fitted to the support hole 74a so as to be relatively rotatable, but the rotation shaft portion 36 is rotatable around the central axis B in the hole of the date-turning claw body portion 35. It may be fitted. In any case, when the operating lever 70 is rotated in the A1 and A2 directions, the rotation center B of the rotation shaft portion 36 of the date driving claw structure 33 is A1 with respect to the rotation center H of the date driving wheel 30. , A2 is relatively rotated.

  The actuating lever 70 that receives the biasing force in the A1 direction by the actuating lever spring 71 is biased in the A1 direction and the reference rotation position P1 biased in the A2 direction (FIGS. 4 to 10 and FIG. 14 described later). It is rotated in the directions of A1 and A2 about the central axis A between the corrected end of the month and the corrected end of month P2 (FIGS. 11 to 13 described later).

More specifically, in this example, the actuating lever 70 is
(1) When the small moon detection protrusion 75 contacts the large-diameter arcuate cam surface 65a corresponding to the large moon among the cam surfaces 65 of the month cam 66, or (2) the month end detection protrusion 76 is the date indicator 40. When contacting the inner peripheral surface 42d of the thick-walled bowl-shaped portion 42b,
Taking the reference rotation position P1 biased in the A2 direction,
(3a) The small moon detection protrusion 75 is in contact with the small-diameter arcuate cam surface 65b corresponding to the small moon among the cam surfaces 65 of the month cam 66, and (3b) the end of month detection protrusion 76 is the date. When fitting into the end-of-month groove 48 formed in the thick bowl-shaped portion 42b of the car 40,
The corrected rotation position P2 at the end of the month is taken, which is biased in the A1 direction under the action of the operating lever spring 71.

  In other words, in this example, the actuating lever 70 has the small-moon detecting projection 75 abutting against the small-diameter circular arc-shaped cam surface 65b corresponding to the small moon among the cam surfaces 65 of the lunar cam 66, and the end-of-month detecting projection 76. Only when it fits in the end-of-month groove 48 formed in the thick-walled hook-shaped portion 42b of the date dial 40, the end of the month is corrected by the actuating lever spring 71, and the corrected end-of-month position P2 is taken. In other cases, the reference rotation position P1 biased in the A2 direction is adopted.

  When the operation lever 70 takes the reference rotation position P1, the operation lever 70 takes the position Bh where the rotation center axis B of the date driving claw structure 33 coincides with the rotation center axis H of the date driving wheel 30. When the corrected rotation position P2 is taken at the end of the month, the rotation center axis B of the date driving claw structure 33 is shifted in the A2 direction with respect to the rotation center axis H of the date driving wheel 30. The position Br is taken. When the actuating lever 70 is at the reference rotation position P1 and the rotation center axis B of the date indicator claw structure 33 is at the reference position Bh, it is pressed against the date indicator pin 32 that is rotated by the rotation of the date indicator driving wheel 30. The rotated date-turning claw structure 33 sends the date wheel 40 by one tooth per day as usual. On the other hand, when the operation lever 70 is at the corrected rotation position P2 at the end of the month and the rotation center axis B of the date-turning claw structure 33 is at the corrected date feed position Br, it is rotated by the rotation of the date indicator driving wheel 30. The date driving claw structure 33 that is pushed and rotated by the date rotating pin 32 engages with the teeth 47 of the date dial 40 twice a day, and feeds the date dial 40 by two teeth per day.

  Next, the calendar operation of the timepiece 2 having the auto-calendar mechanism 1 configured as described above will be described in more detail based on FIGS. 4 to 14 in addition to FIGS.

  FIG. 2 shows a situation in which date feeding is performed in a large month. In the state shown in FIG. 2, since it is not a small moon, the small moon detecting portion 75 of the operating lever 70 contacts the large moon cam surface portion 65a in the form of the large-diameter cam surface portion of the month cam 66, and it is not the end of the month. Since the end-of-month detection portion 76 of the lever 70 is in contact with the inner peripheral surface 42d of the thick bowl-shaped portion 42b of the date dial 40, the operating lever 70 is at the reference position P1, and the rotation center B of the date indicator claw structure 33 Is at a position Bh that coincides with the rotation center H of the date indicator driving wheel 30. More specifically, in FIG. 2, the date driving wheel 30, which is a 24-hour car that is rotated in accordance with the rotation of the hour wheel 16 a, is around the central axis H at approximately 22:44 on August 30. In response to the rotation in the H1 direction, the date turning claw portion 34 of the date turning claw structure 33 at the reference position Bh where the rotation center B coincides with the center H is just engaged with the tooth portion 47 of the date dial 40. A state in which date feeding of the date dial 40 in the direction C2 is started is shown.

  FIG. 4 shows a state at about midnight on August 31 after some time has passed. In this case, the positional relationship between the small moon detecting portion 75 of the operating lever 70 and the lunar cam 66 and the positional relationship between the month end detecting portion 76 of the operating lever 70 and the thick bowl-shaped portion 42b of the date wheel 40 are generally shown in FIG. When the apex of the jumping claw portion 22a of the date jumper 22 has just reached the apex of the tooth portion 47 of the date indicator 40, and the jumping claw portion 22a exceeds the apex of the tooth portion 47, When the date feed is completed, the date display is changed to the 31st as shown in FIG. The time at this time is around midnight on August 31.

  When the time has passed and it is about 22:44 on August 31, the date claw portion 34 of the date claw structure 33 is engaged with the tooth portion 47 of the date dial 40 as shown in FIG. Then the date feed starts. The state shown in FIG. 6 is practically the same as FIG. 2 except that the date is advanced by one day and the date wheel 40 is advanced by one day. There is no change in that the operating lever 70 is at the reference position P1.

  When the time elapses, it is close to the end of the month, so that the month-turning claw portion 46 is turned to the moon 50 and engages the car 50 and starts to turn. Further, at 24 o'clock on August 31, that is, at 0:00 am on September 1 As shown in FIG. 7, the top of the jumping claw 22a of the date jumper 22 has just reached the top of the tooth 47 of the date indicator 40, and the jumping claw of the month jumper 24, as shown in FIG. The apex of 24a has just reached the apex 64b of the tooth portion 64a of the moon star wheel 64.

  When the jumping claw portion 22a of the date jumper 22 exceeds the apex of the tooth portion 47 and the jumping claw portion 24a of the month jumper 24 exceeds the apex 64b of the tooth portion 64a, the date feeding and month feeding are completed, and FIG. As shown in FIG. 4, the day display is changed to one day and the month display “August (AUG)” is changed to “September (SEP)”.

  In the state illustrated in FIG. 8, since the month (small moon) has been entered, the small moon detecting portion 75 of the operating lever 70 is the small moon cam surface portion 65 b in the form of a small diameter cam surface portion of the cam surface 65 of the month cam 66. The end-of-month detection portion 76 of the actuating lever 70 contacts the end-of-month region of the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b beyond the end-of-month groove 48 of the thick-walled hook-shaped portion 42b of the date dial 40. Except for this point, it is the same as FIG. There is no change in that the operating lever 70 is at the reference position P1.

  When the date feed advances, it is near the end of September, and when it reaches about 22:47 on September 30, the state shown in FIG. 9 is reached. In this state, the date turning claw portion 34 of the date turning claw structure 33 is engaged with the tooth portion 47 of the date dial 40 and date feeding is started. In the state illustrated in FIG. 9, the date is advanced by about one month, and the small moon detecting portion 75 of the operating lever 70 is moved to the small moon cam surface portion 65 b in the form of a small diameter cam surface portion of the cam surface 65 of the month cam 66. The end-of-month detection part 76 of the actuating lever 70 is in a position facing the end of the inner peripheral surface 42d of the thick-walled hook-shaped part 42b near the end-of-month groove 48 of the thick-walled hook-shaped part 42b of the date dial 40. Except for the point of contact, it is practically the same as FIG. There is no change in that the operating lever 70 is at the reference position P1.

  When the time elapses and it is about 0:04 am on October 1, the apex of the jumping claw portion 22a of the date jumper 22 is exactly the tooth portion 47 of the date wheel 40 as shown in FIG. The day display is in a state of daily change from “30 days” to “31 days”.

  Next, when the jumping claw portion 22a of the date jumper 22 exceeds the apex of the tooth portion 47, as shown in FIG. 11, the day feeding for one day is completed and the date indicator 40 is moved in the C2 direction by that amount. As a result of rotation, the tooth portion 47 also advances in the C2 direction. This point is approximately 0:05 am on October 1st. As shown in FIG. 11, the display at this time is a virtual display when shifting from a small month of “September 31” to a large month. At this time, since it is a virtual day of September (small month) (31st), the small moon detecting portion 75 of the operating lever 70 is small in the form of a small diameter cam surface portion of the cam surface 65 of the month cam 66. While staying at the position facing the lunar cam surface portion 65b, the month end detection portion 76 of the operating lever 70 is the end of the thick walled portion 42b of the date wheel 40 because it is virtually the end of the month of 31st. It reaches a position facing the groove 48. Accordingly, the small moon detecting portion 75 of the operating lever 70 is fitted into the small diameter cam surface portion 65b of the cam surface 65 of the lunar cam 66, and the end of month detecting portion 76 of the operating lever 70 is the end of the thick-walled hook-shaped portion 42b of the date dial 40. Since it fits in the groove part 48, the operation lever 70 takes the correction rotation position P2 of the end of the month when the operation lever 70 is rotated around the central axis A in the A1 direction. Therefore, the rotation center B of the date fingernail claw structure 33 is also displaced in the A1 direction, and the date fingernail portion 34 takes the corrected end-of-month feed position Br at the back of the tooth portion 47 of the date dial 40.

  Thereafter, when the date indicator driving wheel 30 is rotated and the date indicator driving pin 32 is rotated in accordance with the rotation of the hour wheel 16a, as shown in FIG. The date feed pin 32 pushes the claw portion 34 of the date claw structure 33 in the position Br, and the claw portion 34 pushes the tooth portion 47 of the date wheel 40 by the claw portion 34 (additional addition at the end of the month of the moon) Start daily feed). In this state, the operating lever 70 is at the position P2, and the rotation center B of the date fingernail claw structure 33 is at the position Br.

  As the time progresses, the date indicator 40 is rotated in the C2 direction, and the rotation of the month star wheel 64 via the month indicator driving wheel 50 by the month indicator claw portion 46 is started, as shown in FIG. Around 3:18 am, the top of the jumping claw 24b of the moon jumper 24 reaches the top of the tooth 64a of the moon star wheel 64, and the top of the jumping claw 22a of the date jumper 22 is The top of the tooth 47 is reached. At this time, in the display section of the month and day, the state changes from “September (SEP)” to “October (OCT)” and from “31st” to “1st”. Become.

  Immediately after that, at about 3:18 am on October 1, which is substantially the same time in practice, as shown in FIG. The moon star wheel 64 is set between the next adjacent teeth 64a and 64a of the wheel 64, and the jumping operation of the jumping claw portion 22a of the date jumper 22 is completed, and between the next adjacent tooth portions 47 and 47 of the date wheel 40. A state in which the date indicator 40 is regulated is reached. Thereby, the month display in the region 13a of the window portion 13 by the moon plate 67 of the month wheel 60 completely shifts to “October (OCT)”, and in the region 13b of the window portion 13 by the date display portion of the date wheel 40. The date display completely shifts to “1 day”, and “October 1” is displayed. In this state, the small moon detecting portion 75 of the operating lever 70 comes into contact with the large moon cam surface portion 65a in the form of a large-diameter cam surface portion of the cam surface 65 of the month cam 66, and the end of month detection of the operating lever 70 is performed. The portion 76 comes into contact with the portion of the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b of the date dial 40 that exceeds the end-of-month groove portion 48 in the circumferential direction C1.

  Accordingly, until the night of October 30 near the end of the big month, the state of the hour wheel 16a is reached until the state shown in FIG. 4 (a state around 22:44 on August 30) is reached. In accordance with the rotation of the date indicator 30 which is a 24-hour vehicle, the intermittent rotation (date feeding) of the date indicator 40 is repeated according to the rotation of the date indicator driving wheel 30, and thereafter, depending on whether the moon is a large moon or a small moon The same operations as described in FIGS. 4 to 14 are repeated.

  As described above, in the auto-calendar mechanism 1 of the timepiece 2, the engagement between the small moon detecting portion 75 of the operating lever 70 and the lunar cam 66 and the end of the month detecting portion 76 of the operating lever 70 and the date indicator 40 are thick. More specifically, by engagement with the portion 42b, the engagement of the moon detection projection 75 with the moon cam surface 65b in the form of a small-diameter arc of the month cam 66, and the month end detection projection 76 of the operating lever 70, Due to the engagement with the end-of-month groove portion 48 of the thick wall-like portion 42b of the date wheel 40, the operation lever 70 is rotated under the action of the operation lever spring 71 when moving from the end of the small moon to the beginning of the moon. The center of rotation of the date-turning claw structure 33 supported by the rotating portion of the operating lever 70 is rotated, and additional date feeding is performed. As a result, the calendar display can be appropriately changed when shifting from the small moon to the large moon.

  When correcting the indications LM and LD of the calendar mechanism 1, the winding stem 15a is pulled out and the winding stem 15a is rotated in one direction or the other direction. More specifically, when correcting the date LD displayed on the date display window 13b, for example, the calendar correction shown in FIG. 2 and FIG. 3B is performed by rotating the winding stem 15a in one direction. The wheel 80 is swung in one direction so that the calendar correction wheel 80 is engaged with the date gear 45 of the date wheel 40, and the date wheel 40 is rotated in the C2 direction via the calendar correction wheel 80 by the rotation of the winding stem 15a. When correcting the date LD displayed on the month display window 13a, for example, by rotating the winding stem 15a in the other direction, the calendar correction wheel 80 shown in FIG. 2 and FIG. And the calendar correction wheel 80 is engaged with the month correction pinion 82 of the month correction wheel 81, and the month correction gear 83 of the month correction wheel 81 is rotated via the month correction pinion 82. The moon star wheel 64 is rotated by the gear 83 and the moon plate 67 of the month wheel 60 is rotated in the C1 direction. The mechanism for calendar correction may be different.

  Next, an example in which the additional date feeding is performed before, instead of after the normal date feeding, will be described with reference to FIGS. 15 to 22 as a preferred second embodiment of the present invention. In the timepiece 2A having the auto calendar mechanism 1A as the calendar mechanism of the second embodiment shown in FIGS. 15 to 22, the elements of the timepiece 2 having the calendar mechanism 1 of the first embodiment shown in FIGS. The same reference numerals are given to the same elements, and some elements that are generally corresponding but different are given the same reference numerals as those of the elements of the calendar mechanism 1 of the corresponding timepiece 2 and the subscript A.

  In the calendar mechanism 1A of the second embodiment, since the additional date feeding is performed first, the operating lever 70A receives the elastic biasing force in the A2 direction around the central axis A from the operating lever spring 71A. The actuating lever 70A is provided with a date turning claw support portion 74A at a portion facing the rotation center axis A in the diametrical direction of the timepiece 2A. The fact that the month end detector 76A is in contact with the surface 65 and is opposite to the small moon detector 75A is generally the same as that of the operating lever 70. In this example, the end-of-month groove portion 48A formed on the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b of the date dial 40A is more peripheral than the end-of-month groove portion 48 of the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b of the date dial 40. Except for a long point in the direction, it is formed in substantially the same manner as the month end groove 48.

  In the large moon, as shown in FIG. 15 in the state of August 31, the small moon detecting portion 75A of the operating lever 70A abuts on the large moon cam surface portion 65a in the form of a large diameter cam surface portion of the lunar cam 66. The end-of-month detection portion 76A of the actuating lever 70A is located in the radial direction close to the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b of the date dial 40A, so that it is near the opening of the end-of-month groove portion 48A and within the groove portion 48A. Do not fit. In the state in which the operating lever 70A takes this reference position P1A, the date turning claw structure 33 is located at the position Bh where the rotation center B coincides with the rotation center H of the date indicator driving wheel 30 and the date indicator pin of the date indicator driving wheel 30. With the rotation of the wheel 32, it is actually engaged with the tooth portion 47 at the closest position of the date wheel 40 from about 22:44 as shown in the drawing once a day, so that one tooth of the date wheel 40 is engaged. Send the day by the minute. FIG. 16 shows a state around midnight on September 1 when the daily feeding for one day is completed.

  When the state shown in FIG. 16 is entered after the state shown in FIG. 15, the jumping claw portion 22 a of the date jumper 22 passes over the apex of the tooth portion 47 of the date wheel 40 and falls between the next tooth portions 47, 47. When the jumping operation is performed, the date wheel 40 is rotated in the C2 direction by one tooth (one day). On the other hand, the next tooth 47 is turned to the position close to the back of the claw structure 33. The date display is changed from “31st” to “1st”, and on the other hand, the month-turning claw portion 46 that has reached the back of the claw or tooth portion 52 of the month-turning wheel 50 is engaged with the tooth portion 52. At the same time, the month driving wheel 50 is rotated and the month star wheel 64 is rotated through the month driving wheel 50 to change the month display of the month wheel 60 from “August (AUG)” to “September (SEP)”.

  As shown in FIGS. 17 to 18, the small-month date feed is performed in the same manner as the large-month date feed except for the end of the month. In the small month, as can be seen from FIG. 17, the month end detection portion 76A of the actuating lever 70A is in contact with the inner peripheral surface 42d of the thick bowl-shaped portion 42b of the date dial 40 except at the end of the month. The small-moon detecting portion 75A of the operating lever 70A faces the small-moon cam surface 65b in the form of a concave portion or small-diameter cam surface portion of the monthly cam 66, but does not fall on the concave-shaped cam surface 65b of the monthly cam 66. The support portion 74A is also maintained at the position B that coincides with the position H, and the daily feed for one tooth is performed per day as usual, and the state shown in FIG. 18 is reached. In FIG. 18, since September 30 and the end of the month of the small moon are entered, the small moon detecting portion 75A of the operating lever 70A is in the form of a small-diameter concave portion at about 0:05 am slightly later than usual. The month end detecting portion 76A of the actuating lever 70A moves to a position P2A where it falls into the month end groove portion 48A of the thick-walled hook-shaped portion 42b of the date dial 40A while falling on the small moon cam surface portion 65b. In this state P2A, the position of the rotation center B of the date driving claw 33 supported by the date driving claw support portion 74A of the operating lever 70A is set to a position BrA shifted in the A2 direction from the position of the rotation center H of the date driving wheel 30. take.

  On September 30th, the end of a small month, as shown in FIG. 19, the date-turning claw structure 33 with the center of rotation at the position BrA deviated in the A2 direction from the normal date is 20:41. Engage with the teeth 47 of the car 40A and start date feeding.

  In the state of FIG. 20 in which the jumping operation by the date jumper 22 has been completed, the date indicator 40A is sent in the direction C2 by one tooth, and the date display changes from “30 days” to “31 days”. In this state, the tooth just sent by the date claw structure 33 has reached a position slightly away in the front in the C2 direction (in this example, it is located approximately one hour ahead). In FIG. 19, the time when the additional date advance at the end of the small month is completed is about 21:36. In this state, the month turning claw portion 46 of the date dial 40 </ b> A reaches just before the tooth portion 52 of the month turning wheel 50.

  When one hour has passed, as shown in FIG. 21, at 22:34 on September 30, the date indicator pin 32 has a rotation center at the position BrA as the date indicator pin 30 rotates. The structure 33 is pushed, and the normal daily feeding is started by the claw structure 33 as the second daily feeding at the end of the month.

  When moving the date by the date indicator driving wheel 30, the date jumper 22 performs a jumping operation during the transition from the state of FIG. 21 to the state of FIG. 22, and the date indicator 40 </ b> A is rotated in the direction C <b> 2 by one tooth to display the date Is changed from [31 days] to "1 day", and the date setting claw portion 46 sends the tooth portion 52 of the date setting wheel 50 as the date indicator 40A rotates in the C2 direction. At this time, the moon star wheel 64 is rotated by one tooth by the jumping operation of the moon jumper 24 with respect to the moon star wheel 64, and the month display on the moon plate 67 of the month wheel 60 is changed from “September (SEP)” to “10”. "Month (OCT)" In FIG. 22, the actual moon changes from small moon to big moon, so the small moon detecting portion 75A of the actuating lever 70A is replaced by a large moon cam surface portion 65a in the form of a large diameter cam surface portion of the cam surface 65 of the month cam 66. The end-of-month detecting portion 76A comes out of the end-of-month groove portion 48 of the thick-walled hook-shaped portion 42b of the date dial 40A and comes into contact with the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b. Accordingly, the date driving claw support portion 74A of the operation lever 70A also returns to the original position, and the rotation center B of the date driving claw structure 33 coincides with the rotation center H of the date driving wheel 30.

    Instead of the cam surface 65 of the lunar cam 66 comprising a large moon cam surface portion 65a in the form of a convex portion (large diameter arc-shaped cam surface portion) and a small moon cam surface portion 65b in the form of a concave portion (small diameter arc-shaped cam surface portion). As shown in FIG. 23 to FIG. 30 in the third embodiment, the cam surface 65B of the lunar cam 66B is composed of a lunar cam surface portion 65aB and a convex portion (large diameter arcuate cam surface portion) in the form of a recess (small diameter arcuate cam surface portion). It may consist of the small moon cam surface part 65bB of the form. In the timepiece 2B provided with the calendar mechanism 1B shown in FIGS. 23 to 30, the elements of the timepiece 2 provided with the calendar mechanism 1 shown in FIGS. 2 to 14 and the elements of the timepiece 2A provided with the calendar mechanism 1A shown in FIGS. The same reference numerals are given to the same elements, and the elements corresponding to the elements of the timepiece 2 having the calendar mechanism 1 shown in FIGS. Elements that generally correspond to the elements of the timepiece 2A with 1A but are different are given the same reference numeral (the sign excluding A when the reference sign A is included at the end) followed by the reference sign B.

  In the calendar mechanism 1 </ b> B, the operating lever structure 70 </ b> B takes the form of a link mechanism including a first operating lever 77 and a second operating lever 78. The first actuating lever 77 is supported by the date indicator holder 21 at the base end portion 77a so as to be rotatable around the central axis A in the directions of A1 and A2 by the rotating shaft 25B, and a small moon on one side of the distal end portion 77b. A detection unit 75B is provided. That is, in the third embodiment such as FIG. 23, the actuating lever structure 70 </ b> B has a convex portion instead of the small moon detecting portion 75 </ b> A on the A <b> 1 side of the lunar cam 66 having the small moon cam surface portion 65 b in the form of a recess. A small moon detection unit 75B is provided on the A2 side of the month cam 66B having the small moon cam surface portion 65bB of the form (the side where the month end groove portion 48A of the date indicator 40A is located at the end of the month). The first actuating lever 77 receives the A1 direction biasing force by the first actuating lever spring 77c, and the small moon detecting portion 75B is pressed against the cam surface 65B of the lunar cam 66B.

  The second actuating lever 78 is pivoted in the direction of D1 and D2 around the central axis D by a connecting part 78a positioned near the base end on a pin 77e standing on the intermediate part 77d of the first actuating lever 77. It is connected freely. The second actuating lever 78 supports the date-turning claw structure 33 so as to be rotatable around the central axis B by the date-turning claw support portion 74B at the tip portion of the arm portion 78b, and the date indicator is provided at the tip of the arm portion 78c. A month end detector 76B that abuts against the inner peripheral surface 42d of the 40 thick-walled bowl-like portion 42b is provided, and a side edge 78e of the base end 78d abuts on the rotation shaft 25B to restrict its rotation or swing in the D1 direction. It is comprised so that. The second actuating lever 78 receives a small D2 direction swinging bias force by the second actuating lever spring 78f at the month end detector 76B.

  In the calendar mechanism 1B provided with the operating lever structure 70B in the form of a link mechanism composed of the first and second operating levers 77 and 78 configured as described above, the state of August 31 is illustrated in a large month. 23, the small moon detecting portion 75B of the first actuating lever 77 contacts the large moon cam surface portion 65aB in the form of a concave portion or small diameter cam surface portion of the lunar cam 66B under the action of the first actuating lever spring 77c. Since it contacts, the action lever structure 70B takes the position P1B rotated to the A1 direction as a whole. In this state P1B, the second actuating lever 78 has a date turning claw structure in which the turning position in the D2 direction is regulated and positioned by the turning shaft 25B at the side edge 78e of the base end portion 78d and supported by the second actuating lever 78. The rotation center B of the body 33 takes a position Bh coinciding with the rotation center H of the date indicator driving wheel 30, and the month end detection unit 76B comes into contact with the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b of the date indicator 40A A close position with a gap is taken (they are not fitted into the end-of-month groove 48A). In this state, the date driving claw structure 33 is practically only once a day in accordance with the rotation of the date driving pin 32 of the date driving wheel 30, as shown in FIG. By engaging with the tooth portion 47 at the closest position, the date feed is performed by one tooth of the date dial 40. The state at around midnight on September 1 when the daily feed for one day has ended is as shown in FIG.

  When the state shown in FIG. 24 is entered after the state shown in FIG. 23, the jumping claw portion 22a of the date jumper 22 falls between the next tooth portions 47 and 47 beyond the apex of the tooth portion 47 of the date indicator 40A. When the jumping operation is performed, the date wheel 40A is rotated in the C2 direction by one tooth (one day). On the other hand, the next tooth 47 is turned to the position close to the back of the claw structure 33. The date display is changed from “31st” to “1st”, and on the other hand, the month-turning claw portion 46 that has reached the back of the tooth portion 52 of the month driving wheel 50 is engaged with the tooth portion 52. The month driving wheel 50 is turned and the month star wheel 64 is rotated via the month driving wheel 50 to change the month display of the month wheel 60 from “August (AUG)” to “September (SEP)”.

  As shown in FIG. 25 to FIG. 26, the date feed for the small month is also performed in the same manner as the day feed for the large month except for the end of the month. In the small moon, as can be seen from FIG. 25, the small moon detecting portion 75B of the first actuating lever 77 has a convex portion or a large-diameter cam surface portion of the lunar cam 66B under the action of the first actuating lever spring 77c. Therefore, the first operating lever 77 is rotated in the A2 direction. Accordingly, the second operating lever 78 is also swung in the A2 direction. The A2 direction swing of the second operating lever 78 that is rotatably connected to the first operating lever 77 by the connecting pin 77e is the thickness of the date dial 40 when the month end detecting portion 76B of the second operating lever 78 is other than the end of the month. It stops at a position where it comes into contact with the inner peripheral surface 42d of the meat hook-shaped portion 42b. In this state other than the end of the month, the rotation center B of the date indicator claw structure 33 supported by the second operating lever 78 takes a position Bh that coincides with the rotation center H of the date indicator driving wheel 30. Accordingly, as usual, daily feeding for one tooth is performed per day, and the state shown in FIG. 26 is reached.

  In FIG. 26, since September 30 and the end of the small moon are entered, the small moon detecting portion 75B of the first operating lever 77 of the operating lever structure 70B is a large-diameter arc-shaped portion at about 0:00 am The position P2B where the end-of-month detection portion 76B of the second operating lever 78 of the operating lever structure 70B has fallen into the end-of-month groove portion 48A of the thick-walled hook-shaped portion 42b of the date indicator 40A in the state of being in contact with the small moon cam surface portion 65bA of the form Migrate to In this state P2B, the rotation center B of the date driving claw 33 supported by the date driving claw support portion 74B of the second operating lever 78 takes a position BrB shifted from the rotation center H of the date driving wheel 30 in the D2 direction.

  On September 30, which is the end of a small month, as shown in FIG. 27, the date turning claw portion 33 whose center of rotation is located at a position BrB shifted in the D2 direction from the normal position is around 20:41. Engage with the teeth 47 of 40A and start date feeding.

  In the state of FIG. 28 in which the jumping operation by the date jumper 22 is completed, the date wheel 40A is sent in the C2 direction by one tooth, and the date display changes from “30 days” to “31 days”. In this state, the tooth 47 just sent by the date claw structure 33 has reached a position somewhat apart forward in the C2 direction (in this example, it is positioned forward by approximately one hour). In FIG. 28, the time when the additional date advance in advance at the end of the small month is completed is around 21:36. In this state, the month turning claw portion 46 of the date dial 40 </ b> A reaches just before the tooth portion 52 of the month turning wheel 50.

  When about 1 hour has passed, as shown in FIG. 29, at around 22:34 on September 30, the date indicator pin 32 has the center of rotation at the position BrB as the date indicator driving wheel 30 rotates. The structure 33 is pushed, and the normal date feeding is started by the nail 33 as the second date feeding at the end of the month.

  During date feeding by the date indicator driving wheel 30, the date jumper 22 performs a jumping operation during the transition from the state of FIG. 29 to the state of FIG. 30, and the date indicator 40 </ b> A is rotated in the direction C <b> 2 by one tooth to display the date. Is changed from [31 days] to "1 day", and the date setting claw portion 46 sends the tooth portion 52 of the date setting wheel 50 as the date indicator 40A rotates in the C2 direction. At this time, the moon star wheel 64 is rotated by one tooth by the jumping operation of the month jumper 24 with respect to the moon star wheel 64, and the month display on the moon plate 67 of the month wheel 60B is changed from “September (SEP)” to “10”. "Month (OCT)" In FIG. 30, since it changes from small moon to big moon in practice, the small moon detecting portion 75B of the first operating lever 77 of the operating lever structure 70B is a form of a small diameter cam surface portion of the cam surface 65B of the month cam 66B. The end-of-month detecting portion 76B of the second operating lever 78 comes out of the end-of-month groove portion 48A of the thick-walled hook-shaped portion 42b of the date dial 40A and contacts the inner peripheral surface 42d of the thick-walled hook-shaped portion 42b. Will come into contact. Accordingly, the date driving claw support portion 74B of the second operating lever 78 also returns to the original position, and takes the position Bh where the rotation center B of the date driving claw structure 33 coincides with the rotation center H of the date driving wheel 30. .

  In the timepiece 2C having the calendar mechanism 1C of FIG. 31, the same elements as those of the timepiece 2 having the calendar mechanism 1 of FIGS. 2 to 14 and the timepiece 2B having the calendar mechanism 1B of FIGS. Is given the same code as the code of the element, and elements that are generally corresponding but different are given the same code (if there is B at the end of the code, the code part other than B) is added with the code C. Yes. In the timepiece 2C provided with the calendar mechanism 1C of FIG. 31, the cam surface 65B of the lunar cam 66B is composed of a small moon cam surface portion 65aB in the form of a concave portion (small diameter arc-shaped cam surface portion) and a convex portion (large diameter arc-shaped cam surface portion). Although it is the same as the timepiece 2B provided with the calendar mechanism 1B in that it is configured with the small moon cam surface portion 65bB, the calendar mechanism is different in that the additional date feed at the end of the month is the same as the normal date feed. Unlike the timepiece 2B provided with 1B, it is the same as the timepiece 2 provided with the calendar mechanism 1.

  In the calendar mechanism 1C, the operating lever structure 70C takes the form of a link mechanism including a first operating lever 77C and a second operating lever 78C. The first actuating lever 77C is supported by the date indicator holder 21 by the pivot shaft 25C at the base end portion 77aC so as to be pivotable in the A1 and A2 directions around the central axis A, and on the side of the distal end portion 77bC. A detection unit 75C is provided. That is, in the example of FIG. 31, the actuating lever structure 70C is located on the A1 side of the month cam 66B having the moon-shaped cam surface portion 65bB in the form of a convex portion (the side where the month end groove portion 48 of the date indicator 40 is located at the end of the month). A small moon detector 75C is provided. The first actuating lever 77C receives the A2 direction biasing force by the first actuating lever spring 77cC, and the small moon detecting portion 75C is pressed against the cam surface 65B of the lunar cam 66B.

  The second actuating lever 78C is pivoted in the directions of D1 and D2 around the central axis D by a connecting part 78aC located near the base end on a pin 77eC provided upright in the intermediate part 77dC of the first actuating lever 77C. It is connected freely. The second operating lever 78C supports the claw structure 33 so as to be rotatable around the central axis B by a date claw support portion 74C located at the tip of the arm portion 78bC, and is attached to the tip of the arm portion 78cC. The end-of-month detection unit 76C is in contact with the inner peripheral surface 42d of the thick bowl-like portion 42b of the date dial 40, and is in contact with the rotary shaft 25C at the side edge 78eC of the base end 78dC to rotate or swing in the direction D1. It is configured to be regulated. The second actuating lever 78C receives a small D1-direction swinging bias force by the second actuating lever spring 78fC at the month end detection unit 76C.

  In the actuating lever structure 70C in the form of a link mechanism composed of the first and second actuating levers 77C and 78C configured as described above, the small moon detecting portion 75C of the first actuating lever 77C is the first in the large moon. Under the action of the one actuating lever spring 77cC, the actuating lever structure 70C as a whole takes the position P1C rotated in the A2 direction because it abuts against the Otsuki cam surface 65aB of the lunar cam 66B which is a recess. In this state P1C, the second actuating lever 78C has a turning claw structure whose D1 direction turning position is regulated and positioned by the turning shaft 25C at the side edge 78eC of the base end portion 78dC and supported by the second actuating lever 78C. The rotation center B of the body 33 takes a position Bh coinciding with the rotation center H of the date indicator driving wheel 30, and the end-of-month detection unit 76C comes into contact with the inner peripheral surface 42d of the thick bowl-shaped part 42b of the date indicator 40 A close position with a gap is taken (they are not fitted into the end-of-month groove 48).

  On the other hand, in the small moon, the small moon detecting portion 75C of the first actuating lever 77C abuts on the large-diameter cam surface portion 65bB of the lunar cam 66B that is a convex portion under the action of the first actuating lever spring 77cC. The first operating lever 77C takes a position rotated in the A1 direction. Accordingly, the second operating lever 78C is also swung in the A1 direction. At the end of the A1 direction of the second actuating lever 78 pivotally connected to the first actuating lever 77C by the connecting pin 77eC, the month end detecting portion 76C of the second actuating lever 78 is the thickness of the date dial 40 except at the end of the month. It stops at a position where it comes into contact with the inner peripheral surface 42d of the meat hook-shaped portion 42b. In this state other than the end of the month, the rotation center B of the date indicator claw structure 33 supported by the second operating lever 78C takes a position Bh that coincides with the rotation center H of the date indicator driving wheel 30.

  At the end of the month, the end-of-month detection portion 76C is fitted into the end-of-month groove 48 in the inner peripheral surface 42d of the thick walled portion 42b of the date dial 40, so that the second operating lever 78C is in contact with the first operating lever 77C. Rotating in the direction D1 around the central axis D, the rotation center B of the date indicator claw structure 33 supported by the second operating lever 78C is in the direction D1 with respect to the rotation center H of the date indicator driving wheel 30. It is rotated and displaced, takes the same position as the position Br, and performs an additional daily feed once every month from the end of the small moon to the beginning of the big moon.

  That is, in the timepiece 2C provided with the calendar mechanism 1C of the fourth embodiment shown in FIG. 31, the cam surface 65B of the lunar cam 66B is not a concave portion but is provided with a crescent cam surface portion 65bB in the form of a convex portion. The calendar mechanism shown in FIG. 2 except that 70C includes first and second actuating levers 77C and 78C that form a link mechanism with each other and that the small moon detecting portion 75C is on the A1 side of the lunar cam 66B. It is obvious that the calendar mechanism 1C of the timepiece 2C in FIG. 31 works in the same manner as the calendar mechanism 1 of the timepiece 2, the calendar mechanism 1B of the timepiece 1B, etc. Therefore, detailed description is omitted.

  In the timepiece 2D provided with the calendar mechanism 1D of the fifth embodiment shown in FIGS. 32 to 37, the moon star wheel 64D of the calendar mechanism 1D has 24 teeth 63D. It is rotated by two teeth in January.

  In the calendar mechanism 1D of the timepiece 2D shown in FIGS. 32 to 37, the lunar cam 66D is provided with large moon cam surface portions 65aD1 and 65aD2 in the form of large diameter portions or convex portions, and the small moon cam surface portion in the form of small diameter portions or concave portions. It is similar to the first embodiment (first embodiment) shown in FIGS. 2 to 14 in that it has 65bD2 and the second date feed is performed as an additional date feed after the normal date feed. Elements that are the same as those in the first embodiment are denoted by the same reference numerals, and are substantially the same in function but are different from those in the first embodiment. It is attached.

  In the calendar mechanism 1D of the fifth embodiment, the month driving wheel 50D integrally includes a large-diameter monthly rotation gear 53 and a small-diameter monthly rotation pinion 54 coaxially. The month turning gear 53 of the month driving wheel 50D is engaged with the month turning claw portion 46 of the date indicator 40D and is rotated by two teeth a month by the month turning gear 51. The month turning pinion 54 of the month turning wheel 50D is meshed with the moon star wheel 64D and is rotated according to the rotation of the month turning wheel 53 to rotate the month star wheel 64D by two teeth in January. The lunar board 67D is divided into 24 equal parts, “JAN (January), JAN (January), FEB (February), FEB (February), ..., August (AUG), "August (AUG), September (SEP), September (SEP), ...", the same month is repeated.

  More specifically, as the date wheel 40D rotates in the C2 direction, the first month feed (monthly rotation) from the end of the 30th day of each month, for example, from about 22:44 to about 24:00 on the 30th. The gear 51 rotates the claw portion 46 in the C2 direction), and then the second monthly feed of each month is performed. In the first month feeding of each month, the small moon detecting portion 75D of the operating lever 70D comes into contact with the small moon cam surface portion 65bD1 in the form of the large diameter portion of the month cam 66D, and the second time at the end of the small moon. Only when the month is fed, the small-moon detecting portion 75D of the operating lever is fitted into the small-moon cam surface portion 65bD2 in the form of a small-diameter recess of the month cam 66D. Accordingly, the small moon detection unit 75D also functions as a month end detection unit 76D of the small moon (the small moon detection unit and the month end detection unit are also denoted by reference numeral 79D), and the small moon cam surface portion 65bD2 in the form of a small diameter concave portion represents the small moon. It works not only as a cam face, but also as a month-end recess that represents the end of the month. Therefore, in the calendar mechanism 1D, the operating lever 70D includes an arm portion provided with a date turning claw support portion 74D, a detection portion 75D that functions as a small moon detection portion and a month end detection portion, that is, a small moon detection portion / month end detection portion 79D. The arm portion provided is provided so as to be rotatable around the central axis A, and the month end detection portion is not provided independently.

  Next, the operation of the calendar mechanism 1D will be described in more detail in order based on FIGS.

  For example, FIG. 32 shows the state of the calendar mechanism 1D of the timepiece 2D around 22:44 on August 31 as the end of the big moon. In this state, the moon star wheel 64D is rotated by half a month (one tooth of the two teeth), and the small moon and month end detector 75D of the actuating lever 70D that forms the cam follower is divided into 24 equal parts. The lunar cam 66D is in contact with the end-of-month region 65aD2 in the large-diameter cam surface portion 65aD in the form of a large-diameter portion pointing to August, which is the large month of the lunar cam 66D, and the lunar plate 67D is in the second August (AUG ) Is displayed. The actuating lever 70D is in the normal position P1D, and the rotation center B of the date driving claw structure 33 takes a position Bh that coincides with the rotation center H of the date driving wheel 30. According to the rotation of the date indicator driving wheel 30, the date indicator claw structure 33 starts feeding the tooth portion 47 of the date indicator 40D from this point in time, and the date indicator 40D is rotated in the C2 direction. 46 turns the moon turning gear 53 and turns the moon star wheel 64D through the month turning pinion 54. As shown in FIG. 33, the display is changed from “August (AUG)” to “9” at around 0:00 on September 1 when the day jumper 22 and the month jumper 24 are dropped and the jumping operation is completed. “Month (SEP)” is changed, and the date is changed from “31st” to “1st”. 24bD is a lunar jumper spring.

  Thereafter, after only the same date feeding is repeated, at about 22:44 on September 30, the state shown in FIG. 34 is obtained. In this state, the small moon and month end detecting portions 75D to 79D of the actuating lever 70D are in contact with and engaged with the small moon cam surface portion 65bD1 in the form of the first half of September which is the small moon of the month cam 66D, that is, the large diameter portion. Therefore, the rotation center B of the date driving claw structure 33 remains at the position Bh that coincides with the rotation center H of the date driving wheel 30, and the rotation of the date driving claw portion 33 according to the rotation of the date driving wheel 30. Thus, the claw portion 33 engages with the tooth portion 47 of the date dial 40D and pushes the date dial 40D in the C2 direction to perform the first date feeding. At this time, the month turning claw portion 46 rotates the month star wheel 64D by one tooth via the month turning gear 53. At 0:00 on October 1st when the date jumper 22 and the month jumper 24 are dropped and the jumping operation is completed, as shown in FIG. 35, the display is the first half of “September (SEP)”. To “September (SEP)” (but the same in appearance), the date is changed from “30th” to “31st”. At the time when the jumping operation is completed, as shown in FIG. 35, the second half of September, ie, the small diameter portion, in which the small moon and month end detecting portions 75D to 79D of the operating lever 70D are small moons of the month cam 66D. The rotation center B of the date turning claw structure 33 supported by the support portion 74D of the operating lever 70D is taken at a position BrD shifted from the rotation center H of the date indicator driving wheel 30. Thus, in the state in which the operating lever 70D takes the corrected end-of-month position P2D, the date turning claw structure 33 is positioned again behind the tooth 47 that has just finished date feeding.

  Therefore, as shown in FIG. 36, when the time of about 2 hours has passed, at around 2:04 on October 1, the date turning claw 33 pushed by the date turning pin 32 again becomes the tooth of the date indicator 40D. 47 is engaged, and the date indicator 40D is rotated in the C2 direction. As the date indicator 40D is rotated, the month-turning claw portion 46 is rotated in the same manner as the end of the large month (change from FIG. 32 to FIG. 33). The moon star wheel 64D is further rotated by one tooth through the month driving wheel 50D including the gear 53. When the date jumper 22 and the month jumper 24 are dropped and the jumping operation is completed at about 3:18 on October 1, the display is the second half of “September (SEP)” as shown in FIG. To “October (OCT)”, and the date changes from “31st” to “1st”. At the time when the jumping operation is completed, as shown in FIG. 37, the first and second half of October, that is, the large-diameter portion of the small cam and month-end detecting portion 75D of the operating lever 70D is the big moon of the month cam 66D. The rotation center B of the date claw structure 33 supported by the support portion 74D of the operating lever 70D returns to the normal position Bh that coincides with the rotation center H of the date indicator driving wheel 30.

  As in the fifth embodiment shown in FIGS. 32 to 37, the cam surface 65D of the lunar cam 66D is a lunar cam surface portion 65aD1, 65aD2 in the form of a convex portion (large-diameter arc-shaped cam surface portion), and the preceding small moon cam surface portion. As shown in the sixth embodiment in FIG. 38, instead of the 65bD1 and the later (end of month) small moon cam surface 65bD2 in the form of a recess (small-diameter arcuate cam surface), the cam surface 65E of the month cam 66E Otsuki cam surface portions 65aE1 and 65aE2 in the form of concave portions (small-diameter arc-shaped cam surface portions), the preceding-stage Kozuki cam surface portion 65bE1, and the latter-stage (end of month) Otsuki-cam surface portions 65bE2 in the form of convex portions (large-diameter arc-shaped cam surface portions). It may consist of In the timepiece 2E provided with the calendar mechanism 1E shown in FIG. 38, the same elements as those of the timepiece 2 provided with the calendar mechanism 1 shown in FIGS. 2 to 14 and the timepiece 2D provided with the calendar mechanism 1D shown in FIGS. Is given the same code as the code of the element, and elements that correspond approximately but differ are given the same code (if there is D at the end of the code, the code part other than D) followed by the code E .

  In the calendar mechanism 1E, the cam surface at the end of the moon portion is the moon moon cam surface portion 65bE2 in the form of a convex portion (large-diameter arc-shaped cam surface portion). Although the detectors 75E to 79E are different in that they are located on the opposite side (the A1 side of the month cam 66E, not the A2 side) of the actuating lever 70D and the month-end detectors 75D to 79D, other In this point, the configuration is generally the same as that of the operating lever 70D. In the calendar mechanism 1E, the small moon detecting portion 75E of the operating lever 70E also serves as a month end detecting portion, and the small moon cam surface portion 65bE2 in the form of a convex portion of the month cam 66E also serves as a month end defining portion. Unlike the case of the fourth embodiment shown in FIG. 31 having the month end groove portion 48, the date indicator 40D does not need to have a month end groove portion. Therefore, the operating lever structure 70E differs from the operation lever structure 70C in the form of the link mechanism. In addition, it is the same as the lever 70D of the fifth embodiment in that the lever is in the form of a single integrated structure.

  FIG. 38 shows the state of the calendar mechanism 1E of the timepiece 2E at around 22:44 on August 30, which is near the end of the great moon. In this calendar mechanism 1E, since the end of the month of the moon cam is a convex portion 65bE2 instead of the concave portion 65bD2, and the operating lever is provided with a small moon detecting portion / month end detecting portion 75E on a different side accordingly, the calendar mechanism Since it is clear that it operates in the same manner as 1D, detailed description is omitted.

  As shown in the fifth embodiment of FIGS. 32 to 37, instead of performing the additional date feeding as the second date feeding in the type in which the moon 67D is divided into 24 sections as shown in the fifth embodiment of FIGS. As in the case of the example, a watch 2F equipped with a calendar mechanism 1F that performs an additional date feed before the normal date feed (as the first date feed of two date feeds) is the seventh implementation. An example is shown in FIG.

  In this calendar mechanism 1F, the cam surface 65D of the lunar cam 66D is convex to the large moon cam surface portions 65aD1 and 65aD2 forming the front and rear (end of the month) of the large moon and the small moon cam surface 65bD1 forming the front of the small moon. The fifth embodiment is different from the fifth embodiment in that the small moon cam surface portion 65bD2 forming the latter part (end of month) of the small moon takes the form of a concave portion (small diameter arc-shaped cam surface portion). It is the same. Therefore, the actuating lever 70F is practically the fifth in that it also includes an arm portion provided with a support portion 74F that supports the date claw structure 33 and engagement protrusions 75F to 79F that function as a small moon detecting portion and a month end detecting portion. The arrangement is substantially the same as that of the working lever 70A of the second embodiment shown in FIGS. 15 to 22 except that the independent month-end detecting unit is omitted.

  In the seventh embodiment shown in FIG. 39, the month turning wheel 53F and the month turning pinion 54F of the month turning wheel 50F are smaller in diameter than the month turning wheel 53 and the month turning pinion 54 of the month turning wheel 50D of the fifth embodiment. Since the number of teeth is small and the tooth 55F of the month turning gear 53F is engaged with the month turning claw 46F of the date indicator 40F only once, the date indicator 40F works when the display changes from the 29th to the 30th. The calendar mechanism 1D is configured in the same manner as the calendar mechanism 1D except that it includes a month-turning claw 46F1 and a second month-turning claw 46F2 that works when the display changes from the 31st to the 1st.

  Since it is clear that the calendar mechanism 1F operates in the same manner as the calendar mechanism 1D, detailed description thereof will be omitted.

  In the type in which the lunar board 67D is divided into 24 sections as shown in the fifth embodiment of FIGS. 32 to 37, instead of performing the additional date feeding as the second date feeding after the normal date feeding, FIG. As in the case of the second embodiment of FIG. 22, the additional daily feed is performed before the normal daily feed (as the first daily feed of the two daily feeds). Similarly to the cam surface 65E of the lunar cam 66E of the sixth embodiment shown in FIG. 38, the small moon cam surface portion 65bE2 in the latter stage (end of month) of the small moon is a convex portion (large-diameter arc-shaped cam surface portion). The other cam surface portions (the former stage of the large moon and the latter stage (end of the month) and the previous stage of the small moon), that is, the large moon cam surface portions 65aE1 and 65aE2 and the small moon cam surface portion 65bE1 are concave surfaces (small diameter cam surface portions). A watch 2G equipped with a calendar mechanism 1G adopting It is shown in Figure 40 as an example.

  The actuating lever 70G of the eighth embodiment is actually also provided with an arm portion provided with a support portion 74G that supports the date turning claw structure 33 and engagement protrusions 75G to 79G that function as a small moon detecting portion and a month end detecting portion. The arrangement is the same as that of the sixth embodiment, and the arrangement thereof is substantially the same as that of the operating lever 70B of the third embodiment shown in FIGS. 23 to 30 except that an independent month-end detection unit is omitted.

  Note that the month driving wheel 50F and the date indicator 40F of the eighth embodiment shown in FIG. 40 are configured similarly to the month indicator driving wheel 50F and the date indicator 40F of the seventh embodiment shown in FIG.

  Since it is clear that the calendar mechanism 1G operates in the same manner as the calendar mechanisms 1D, 1E, etc., detailed description thereof will be omitted.

1,1A, 1B, 1C, 1D, 1E, 1F, 1G Calendar mechanism (auto calendar mechanism)
2, 2A, 2B, 2C, 2D, 2E, 2F, 2G Clock with calendar mechanism 3 Appearance 6 Base plate 7a Second receiving 7b Center pipe 11 Time display hand 11a Hour hand 11b Minute hand 11c Second hand 12 Dial 12a Typesetting 13 Month / day display window 13a Moon display window (moon display area)
13b Day display window (day display area)
14 watch case 15 crown 15a winding stem 16a hour wheel (cylinder wheel)
16a1 cylindrical portion 16b minute wheel 16c second wheel (fourth wheel)
17a Tubular gear 21 Date wheel retainer 21a Hole 22 Date jumper 22a Date jump control claw 22b Date jump control spring 23 Month wheel press 24 Month jumper 24a Moon jump control claw 24b Moon jump control spring 24bD Month jumper spring 24c Rotation Shaft part 25, 25B, 25C Rotation center shaft 30 Day turning wheel 31 Day turning gear part 32 Day turning pin 33 Day turning claw structure (day turning claw)
34 Date turning claw portion 35 Date turning claw body portion 36 Rotating shaft portion 40, 40A, 40D, 40F Date wheel 41 Date display wheel portion 41a Dial side surface 42a Large diameter cylindrical portion 42b Thick collar portion 42c Thick wall Cylindrical part 42d Inner peripheral surface 45 Date gear part 46, 46F Month feed dog part (monthly claw part)
46F1 1st month turning claw part 46F2 2nd month turning claw part 47 tooth part 48, 48A month end groove part 50, 50D, 50F month turning wheel (monthly transmission car)
51 Gear 52 Tooth 53, 53F Monthly turning gear 54, 54F Monthly turning 55F Tooth 60, 60B Monthly car (month indication car)
61 Month indication vehicle guide pipe 62 Hub portion 63, 63D Tooth portion 64, 64D Moon star wheel (moon gear)
64a Tooth 64b Vertex 65, 65B, 65E Cam surface 65a, 65aB, 65aD1, 65aD2 Otsuki cam surface 65b, 65bB, 65bD1, 65bD2 Kozuki cam surface 66, 66B, 66D, 66E Moon cam 67, 67D Display board)
67a Dial-side surface 70, 70A, 70B, 70C, 70D, 70E, 70F, 70G Actuating lever 70a Hole 71, 71A Actuating lever spring 72 Spring receiving portion 73 Flat plate 73a Central opening 73b Long hole portions 74, 74A, 74B, 74C, 74D, 74E, 74F, 74G Date-turning claw support portion 74a Support hole 75, 75A, 75B, 75C, 75D, 75E
76, 76A, 76B, 76C, 76D End of month detection protrusion (end of month detection)
77, 77C First operation lever 77a, 77aC Base end portion 77b, 77bC Tip portion 77c, 77cC First operation lever spring 77d, 77dC Intermediate portion 77e, 77eC Connection pin 78, 78C Second operation lever 78a, 78aC Connection portion 78b, 78bC Arm portion 78c, 78cC Arm portion 78d, 78dC Base end portion 78e, 78eC Side edge 78f, 78fC Second actuating lever springs 79D, 79E, 79F, 79G Kozuki detection portion / month end detection portion 80 Calendar correction wheel 81 Month correction wheel 82 Month correction pinion 83 Month correction gear A, B, C, D, H, J Center axis Bh Reference position Br, BrA, BrB, BrD Revised month end date feed position A1, A2, C1, C2, D1, D2, H1, J1 Rotation (rotation) direction LD Date display letter L Month display characters P1, P1A, P1B, P1C, the reference rotation position of the P1D actuating lever (reference position)
P2, P2A, P2B, P2D Operative lever end of month correction (correction) rotation position (end of month end correction (correction) position)

Claims (10)

An actuating lever structure that includes a cam follower for detecting the moon and is swingably supported on a support substrate of the watch;
As a rotational center of which is supported on the actuating lever structure as displaced according to the swing of the operating lever structure a date indicator driving pawl teeth engaged with date feeding of the date indicator,
The actuating lever structure to vary the end swingingly displaced position of the actuating lever structure such that the date indicator driving pawl may perform additional date feeding only one day during the first month of the large month from the small month A calendar mechanism having a lunar cam engaged with the small moon detection cam follower. Date indicator driving wheel is rotatably supported by the supporting substrate of the timepiece, claim the rotational center of the date indicator driving pawl is supported by the actuating lever structure swingably with respect to the rotation center of the date indicator driving wheel 2. The calendar mechanism according to 1. 3. The calendar mechanism according to claim 1, wherein the month cam is a concave portion in which a small month is recessed with respect to the cam follower portion for detecting the small moon . The calendar mechanism according to claim 1 or 2, wherein the month cam is a convex portion in which a small month protrudes from the cam follower for detecting the small moon . The calendar mechanism according to any one of claims 1 to 4, wherein the month cam is divided into 12 equal parts. The calendar mechanism according to any one of claims 1 to 4, wherein the month cam is divided into 24 equal parts. The actuating lever structure and the month cam, during the period from the end of the small month to month first large month, date feeding claw to the additional date feeding after the usual date feeding to the date indicator The calendar mechanism according to any one of claims 1 to 6, which is configured as described above. The actuating lever structure and the month cam, during the period from the end of the small month to month first large month, date feeding claw to the additional date feeding before regular date feeding to the date indicator The calendar mechanism according to any one of claims 1 to 6, which is configured as described above. The calendar mechanism according to any one of claims 1 to 8, wherein the actuating lever structure includes a single rigid lever or a link mechanism of a plurality of rigid levers.   A timepiece comprising the calendar mechanism according to any one of claims 1 to 9.

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