JP4298332B2 - Clock calendar mechanism - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a timepiece calendar mechanism.
[0002]
[Prior art]
Various types of calendar display mechanisms for the pointer display type clock, especially the month-end uncorrected mechanism, have been proposed, and one of them is one in which a calendar mechanism is incorporated as a mechanical configuration in the pointer display type clock. (See Patent Document 1 and Patent Document 2)
[0003]
FIG. 1 is a plan view showing a calendar mechanism of a conventional timepiece, and FIG. 2 is a cross-sectional view. 3 is an enlarged view of the main part of FIG. 1, in which (a) is a diagram showing a date feeding operation in a large month, and (b) is a diagram showing a date feeding operation in a small month. Hereinafter, an outline of a date feeding operation according to a calendar mechanism of a conventional timepiece will be described with reference to FIGS. An hour wheel 5 is provided in the center, and the rotation of the hour wheel 5 is transmitted to the date indicator driving wheel 3 and is decelerated so as to rotate once around the center portion 8 in 24 hours. The date indicator driving wheel 3 is provided with a date feeding claw 6 for feeding a tooth portion 10 provided on the date plate 1, and is made of an elastic member such as plastic. Further, the hour star wheel 2 is rotatably held on the hour wheel 5 so that a moonboard (not shown) is sent once a month.
[0004]
4 is a small moon detection lever that is pivotally supported about a shaft 7. The small moon detection part 4a which is one end of the small moon detection lever 4 is engaged with the tooth bottom 9a or the tooth bottom 9b of the moon star wheel 2. Here, the root portion 9a is a portion corresponding to the large moon, that is, 1, 3, 5, 7, 8, 10, and December, and the root portion 9b is a small moon, that is, 2, 4, 6, This is the part corresponding to September and November. The tooth bottom portion 9b has a shape that is cut deeper than the tooth bottom portion 9a.
[0005]
Further, the other end of the small moon detection lever 4 is a date feed restricting portion 4b, which contacts the boss 11 provided on the date feed claw 6 and bends the date feed claw 6 to perform a date feed operation. regulate.
[0006]
Here, with reference to FIG. 3A, the date feeding operation in a large month will be described. In the large moon, the small moon detecting portion 4 a of the small moon detecting lever 4 is in contact with the tooth bottom portion 9 a of the moon star wheel 2. The tooth bottom portion 9a has a shape with a shallow cut, and the small moon detection lever 4 does not rotate from the contact position. At this time, the date feed restricting portion 4b which is the other end of the small moon detection lever 4 is at the position in the figure, and the date feed claw 6 is bent toward the center portion 8 of the date driving wheel 3 through the boss 11. . As a result, the front tooth portion 10a of the date plate 1 is not engaged with the date feeding claw 6 and is fed idle, and only the rear tooth portion 10b is fed. In other words, the date feeding claw 6 is configured to feed the date for one day, that is, only one tooth portion 10 in the case of a large month.
[0007]
The 30th day detection lever 12 regulates the operation of the small moon detection lever 4 at the time of date feeding, but does not particularly affect the date feeding operation for a large month.
[0008]
Next, referring to FIG. 3B, the date feeding operation in a small month will be described. In the small moon, the small moon detector 4a enters the tooth bottom portion 9b. Since the tooth bottom part 9b has a shape cut deeper than the tooth bottom part 9a, the rotation range of the small moon detection lever 4 is widened accordingly. However, except for the 30th day, the 30th day detection lever 12 is in the position of the dotted line in the figure, and the small moon detection lever 4 is restricted in the direction of the central portion 8 of the date indicator driving wheel 3 so as not to rotate any further. ing. Therefore, in this state, the small moon detection unit 4a is not in contact with the tooth bottom portion 9b, and the small moon detection lever 4 has a remaining rotational force. That is, the state is the same as the state in the large moon, and only the tooth portion 10b is sent during the date feeding operation.
[0009]
As described above, except for the 30th day, the date feeding operation for feeding one tooth at a time is performed as in the case of the large month. However, when the date plate 1 is further rotated and the 30th day is reached, the 30th day detection lever 12 falls into the recess 13 formed in the date plate 1 and the regulating force on the small moon detection lever 4 is weakened. As a result, the small moon detection lever 4 rotates from the dotted line position to the solid line position in the figure with the shaft 7 as the center, the restriction force on the date feeding claw 6 is weakened, and the deflection of the date feeding claw 6 is reduced. . As a result, the date feeding claw 6 is engaged with the front tooth portion 10a which has been idled except on the 30th day of the large month and the small month, and the date is set for 2 days, that is, the tooth portion 10 is moved to 2 Tooth will be sent. In other words, the date feeding claw 6 is a small month, and only in the case of the 30th day, the date is fed by two days, that is, the tooth portion 10 is fed by two teeth.
[0010]
[Patent Document 1]
JP-A-63-313089 (page 2-5, Fig. 1-4)
[Patent Document 2]
JP-A-8-43547 (FIGS. 3-6 and 1-11)
[0011]
[Problems to be solved by the invention]
In the calendar mechanism of the conventional timepiece, the date feeding claw is formed to a minimum length necessary for performing the date feeding operation. This is because if the date feeding claw is formed longer than necessary, it will come into contact with other tooth portions not related to the target date feeding operation, and the date feeding operation will become unstable.
[0012]
However, since the date feeding claw is formed to the minimum necessary length, the engagement with the tooth portion becomes loose on the contrary, and the date feeding operation may become unstable. In addition, after the date feeding operation, there is a case where the tooth part is irrelevant.
[0013]
The present invention has been made in view of the above problems, and an object of the present invention is to provide a timepiece calendar mechanism, in particular, a timepiece calendar mechanism with improved stability of a date feeding operation in a month end uncorrected mechanism.
[0014]
[Means for Solving the Problems]
At least a date driving wheel that rotates once a day in response to rotation from the hour wheel , a date feeding claw for sending a date plate provided in the date driving wheel, and a moon star wheel for sending the moon plate , and 30 days detecting means for detecting a 30 day of the date plate, a short month detecting means for detecting a short month of the month plate, whether the 30 day detecting means detects 30 days a first date feeding claw regulating means及 beauty the small moon detecting means for regulating the engagement to the date plate before Symbol date feeding claw-out based on whether it has detected the month of the small, feed the date A calendar mechanism of a timepiece provided with second date feeding claw regulating means for regulating the date feeding claw to be bent to the date turning wheel side so that the claw does not touch the next tooth portion after the date feeding operation , The small moon detecting means engages one end of a small moon detecting lever pivotally supported on the bottom of the moon star wheel so that the small moon of the moon plate The 30th day detecting means is a means for detecting the 30th day of the date plate by engaging the other end of the small moon detecting lever with a recess provided in the date plate. And the first date feeding claw restricting means engages the date feeding claw with the date plate by abutting the date feeding claw on the small moon detection lever and bending the date feeding claw to the date indicator driving wheel side. The calendar mechanism of the watch, which is a means for regulating, is used .
[0017]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 4 is a plan view showing a calendar mechanism of a timepiece according to an embodiment of the present invention, and FIG. 5 is a cross-sectional view. 6 is an enlarged view of the main part of FIG. 4, (a) is a diagram showing a date feeding operation when there is no date feeding claw regulating member, and (b) is a case where there is a date feeding claw regulating hand member. It is a figure which shows this day feeding operation. Hereinafter, the date feeding operation according to the calendar mechanism of the timepiece according to the first embodiment of the present invention will be described with reference to FIGS. Since the basic date feeding operation is the same as the conventional one, the description is omitted, and only the portion related to the present invention will be described. As a feature, the conventional date feeding claw 6 is formed to a length that can secure a sufficient amount of engagement with the tooth portion 10 to form a date feeding claw 14, and after the date feeding claw 14 is moved to the date feeding operation, This is to provide a date feeding claw regulating member 15 that regulates contact with an extra portion of the portion 10. Usually, when the date feeding claw formed to the minimum necessary length is lengthened, there arises a problem that the date feeding claw as described above comes into contact with an extra tooth portion during the date feeding operation.
[0018]
First, referring to FIG. 6A, a date feeding operation when the date feeding claw restricting member 15 is not provided will be described. When the date indicator driving wheel 3 rotates during the date feeding operation (Otsuki in the figure), the date feeding claw 14 engages with the tooth portion 10b provided on the date plate 1 as in the conventional art. Thereafter, normally, the date feeding claw 14 passes without contacting the next tooth portion 10c, and the date feeding operation is completed at that time. However, since the date feeding claw 14 is formed longer than the conventional one, when it moves from the position of the dotted line to the position of the solid line in the drawing, it contacts the next tooth portion 10c. As a result, problems such as feeding two teeth where one tooth should be fed occur.
[0019]
Therefore, when the date feeding claw is formed long, it is necessary to provide some regulating means so that the date feeding claw 14 does not come into contact with the extra tooth portion 10c. In the present invention, the date feeding claw regulating member 15 is provided as the regulating means.
[0020]
Hereinafter, with reference to FIG. 6B, the date feeding operation when the date feeding claw restricting member 15 is provided will be described. When the date indicator driving wheel 3 rotates during the date turning operation (the figure is Otsuki), the date feeding claw 14 is engaged with the tooth portion 10b provided on the date plate 1 as in the prior art, and the tooth portion 10b is Sent. Thereafter, as the rotation of the date indicator driving wheel 3 advances, the date feeding claw 14 is moved in the direction of the rotation center 8 of the date indicator driving wheel 3 by the date feeding finger restricting member 15 via the boss 11 provided on the date indicator driving wheel 3. It is gradually bent. As a result, the date feeding claw 14 moves from the position of the dotted line in the figure to the position of the solid line without coming into contact with the tooth portion 10c that has been in contact when the date feeding claw regulating member 15 is not provided. The feed operation is completed.
[0021]
In the embodiment of the present invention, the leading edge of the date feed restricting portion 4b serves as a 30th day detection lever. That is, in the case of a small month and the 30th day, the tip of the date feed restricting portion 4b falls into the recess 13 and moves from the position of the solid line to the position of the dotted line in FIG. Will be performed.
[0022]
As described above, in the present invention, the date feeding claw is formed long to ensure a sufficient amount of engagement with the tooth portions 10a and 10b, and at the same time, the date feeding claw 14 is not in contact with the tooth portion 10c. A claw restricting member 15 is provided, and the date feeding claw 14 is bent.
[0023]
Note that the date feeding claw does not necessarily need to be formed long, but in that case, the effect of securing a sufficient amount of engagement with the tooth portion cannot be expected, and the extra tooth portion after the date feeding operation cannot be expected. Only the effect of preventing contact will be produced.
[0024]
Further, the shape of the date feeding claw regulating member 15 may be any shape as long as the date feeding claw 14 can be accurately regulated, and is not particularly limited.
[0025]
【The invention's effect】
As is apparent from the above description, according to the present invention, the date feeding claw provided in the date indicator driving wheel is formed long to ensure a sufficient amount of engagement with the tooth portion, and the date feeding claw regulating portion member is By providing and preventing the date feeding claw from coming into contact with an extra tooth portion after the date feeding operation, the stability of the date feeding operation, particularly the two-tooth feeding operation in a small moon can be improved.
[Brief description of the drawings]
FIG. 1 is a plan view showing a calendar mechanism of a conventional watch. FIG. 2 is a cross-sectional view showing a calendar mechanism of a conventional watch. FIG. 3 is an enlarged view of a main part of FIG. FIG. 4 is a plan view showing an embodiment of the present invention. FIG. 5 is a cross-sectional view showing an embodiment of the present invention. 4 is an enlarged view of the main part of FIG. 4, (a) a diagram showing a date feeding operation when there is no date feeding claw regulating member, and (b) a diagram showing a date feeding operation when there is a date feeding claw regulating member. ]
1 day plate 2 moon star wheel 3 day turning wheel 4 small moon detection lever 4a small moon detection unit 4b date feeding restriction unit 5 hour wheel 6 date feeding claw 7 shaft 8 center 9a tooth bottom (shallow)
9b Tooth bottom (deep)
10 tooth part 10a tooth part (first tooth)
10b Teeth (second tooth)
10c Teeth (3rd tooth)
11 Boss 12 Day 30 detection lever 13 Recess 14 Day feed claw (long)
15 Day feeding claw restricting member

Claims (1)

At least a date driving wheel that rotates once a day in response to rotation from the hour wheel , a date feeding claw for sending a date plate provided in the date driving wheel, and a moon star wheel for sending the moon plate , and 30 days detecting means for detecting a 30 day of the date plate, a short month detecting means for detecting a short month of the month plate, whether the 30 day detecting means detects 30 days a first date feeding claw regulating means及 beauty the small moon detecting means for regulating the engagement to the date plate before Symbol date feeding claw-out based on whether it has detected the month of the small, feed the date A calendar mechanism of a timepiece having second date feeding claw regulating means for regulating the date feeding claw by bending the date feeding claw to the date turning wheel side so that the claw does not touch the next tooth portion after the date feeding operation ,
The small moon detection means is a means for detecting a small moon on the lunar plate by engaging one end of a small moon detection lever pivotally supported on the tooth bottom of the moon star wheel,
The 30th day detection means is a means for detecting the 30th day of the date plate by engaging the other end of the small moon detection lever with a recess provided in the date plate,
The first date feeding claw regulating means regulates the engagement of the date feeding claw with the date plate by bringing the date feeding claw into contact with the small moon detection lever and bending the date feeding claw toward the date indicator driving wheel. A clock calendar mechanism characterized by being a means .

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