JPH0452706Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a calendar correction mechanism for a watch.

[Summary of the invention] The present invention integrates the calendar correction gear, which is a correction member, into the stopper wheel in the calendar mechanism of a watch, and improves the position of the calendar correction gear, thereby making the calendar correction mechanism compact. The present invention provides a calendar watch that has a small number of parts and is smaller and thinner.

[Prior art] The conventional gear-based calendar correction mechanism is
As shown in FIG. 4, the winding stem 41 is engaged
A calendar correction transmission wheel 45 is engaged with a wheel 44 interlocked with a wheel 2 and a bolt 43 to perform calendar corrections such as date correction. The main wheel has a structure in which a gear 44-a is provided on the outer periphery of the watch body, and the gear 44-a meshes with the aforementioned calendar correction transmission wheel.

Further, as shown in FIG. 5, the structures of the first calendar correction transmission wheel 50 and the second calendar correction transmission wheel 51 that mesh with the hexagonal wheel 44 are also known.

[Problems that the invention aims to solve] However, in the case of the conventional calendar correction mechanism shown in Fig. 4, although the number of parts is small and it is optimal for low-cost watches, the engagement between the Z tooth 44-a located on the outside of the clutch wheel and the calendar correction transmission wheel 45 results in a large gear inner diameter for the date wheel 46, which determines the calendar size, and this is a problem in providing a compact calendar watch. Also, in the calendar correction mechanism shown in Fig. 5, the tooth inner diameter of the date wheel 52 is small,
Although it is possible to provide a compact calendar timepiece, the number of parts and processing steps has increased, such as by loosely fitting the second calendar correction transmission gear shaft 54 to the date dial holder 53, which is a member for holding the first calendar correction transmission wheel and the second calendar correction transmission wheel, resulting in a cost problem.

Therefore, in order to solve these conventional problems, the present invention reduces the number of parts by improving the gear position provided on the hexagonal wheel meshing with the calendar correction transmission wheel and the guide position of the calendar correction transmission wheel. The purpose of this invention is to provide a calendar watch that is smaller and thinner.

[Means for Solving the Problems] In order to solve the above problems, the calendar correction mechanism of the timepiece of the present invention includes a winding stem, which is an external operating member that can be moved by a predetermined amount in the axial direction, and a winding stem that is fitted into the winding stem. a wheel mounted on the wheel and interlocked with its axial movement and rotation; a calendar correction gear integrally provided on the circumferential surface of the flange on the clock center side of the wheel; A calendar correction device, which is provided in a bridge portion of a watch frame that straddles a position that allows the interlocking in a guide groove, and is provided in a direction perpendicular to the axle axis line, and the lower part of the tooth portion is set so as to be able to mesh with the calendar correction gear. A transmission wheel and a shaft portion are movably fitted into a deformed hole formed in a timepiece frame along the calendar correction transmission wheel, and the teeth thereof are constantly engaged with the upper part of the teeth of the calendar correction transmission wheel, The shaft portion is moved to one end or the other end of the deformed hole depending on the rotating direction of the calendar correction transmission wheel, and the date dial side is at one end position of the deformed hole, and the day dial side is at the other end position of the deformed hole. car side and
It is equipped with a calendar correction wheel that meshes with each other to transmit the rotational force of the calendar correction transmission wheel to the date wheel or the day wheel.

[Function] According to the calendar correction mechanism of the watch configured as described above, the calendar correction transmission wheel can be moved closer to the center side of the watch and the winding stem, so that cost reduction can be achieved with a small number of parts. It becomes possible to create a calendar watch that is smaller and thinner.

[Examples] Examples of the present invention will be described below with reference to the drawings. FIG. 1 is an assembled plan view showing a calendar correction mechanism according to an embodiment of the present invention, and FIGS. 2 and 3 are sectional views of essential parts thereof.

Reference numeral 1 indicates a base plate which is a watch frame, 2 indicates a winding stem which is an external operating member that can be moved by a predetermined amount in the axial direction, and 3 indicates a cockpit, which performs a known function. 4 is a tsuzumi car,
It engages with the corner of the winding stem 2 and is interlocked with the axial movement and rotation of the winding stem 2. In addition, the handwheel 4 is provided with a handwheel tooth (upper tooth) 4-a on the end face on the clock center side, which meshes with the small iron wheel 5 to set the time, and on the circumferential face of the clock center side flange. It has a calendar correction gear 4-b for correcting the calendar. The calendar correction gear may be formed integrally with the wheel body or may be incorporated as a separate part. Reference numeral 6 denotes a bolt which engages with the gear wheel groove 4-c and positions the gear wheel in conjunction with the rear wheel.

7 is a calendar correction transmission wheel disposed between the calendar correction gear 4-b and the date wheel 9, and is rotatably mounted on the guide shaft 1-a on the main plate 1 side, and the lower part of the gear part is connected to the calendar correction gear 4-b. In the corrected state, it meshes with the calendar correction gear 4-b, and the upper part of its teeth always meshes with the teeth of a calendar correction wheel 8, which will be described later.

The guide shaft 1-a is attached to a bridge portion 1-c of the main plate 1 that straddles a position (above the operating range) that allows the above-mentioned interlocking in the bar guide groove 4-c, which is the constriction of the wheel wheel 4. It is integrally formed so as to protrude in the direction perpendicular to the line (see Figs. 1 to 3).

The calendar correction wheel 8 is installed so that its shaft part is movably fitted into a deformed hole 1-b formed in the base plate 1 along the calendar correction transmission wheel 7, as shown in FIG. It is arranged like a planetary gear with respect to the transmission wheel 7. Therefore, when the calendar correction transmission wheel 7 rotates, the shaft portion of the calendar correction wheel 8 moves into the deformation hole 1 depending on the direction of rotation.
-b is moved (swung) to one end (date wheel side) or the other end (day wheel side), and is directly engaged with the date wheel 9 at one end position of the deformed hole 1-b, and other than the deformed hole 1-b. At the end position, it meshes with the day correction transmission wheel 10 connected to the day wheel 12, and transmits the rotational force of the calendar correction transmission wheel 7 to the date wheel 9 or the day correction transmission wheel 10 (day wheel side). 1
1 is a date wheel holder, and 12 is a day wheel guided to the hour wheel 13. Detailed explanation will be omitted since all of them perform well-known functions.

Next, the Sunday correction state will be explained.

By pulling out the winding stem one step, the switching mechanism performs a known function, and the calendar correction gear 4-b formed as a hexagonal wheel meshes with the calendar correction transmission wheel 7. When the winding stem is rotated clockwise, the calendar correction wheel 8 swings toward the date wheel along the main plate deformation hole 1-b, engages with the date wheel, and performs date correction.

Further, when the winding stem is rotated to the left, the calendar is similarly swung and engaged with the day-of-day correction transmission wheel, and the day of the year is corrected via the day-of-day correction transmission wheel.

Next, to explain the hand alignment state, by further pulling out the winding stem, the switching mechanism performs a known function, and the wheel moves forward toward the center of the watch, and the above-mentioned calendar correction gear 4-b and calendar correction The transmission wheel 7 is disengaged, the gear teeth 4-a and the small iron wheel 5 are engaged, and a known operation is performed. The calendar correction transmission wheel guide shaft provided on the main plate is placed with a gap between it and the stop wheel bolt guide groove.

As described above, in the calendar correction mechanism of the timepiece of this embodiment, the shaft portion of the calendar correction transmission wheel 7 is disposed within the bar guide groove 4-c of the wheel 4.
The calendar correction transmission wheel 7 can be moved closer to the center of the watch and the winding shaft than in the past, making it possible to make the watch smaller and thinner.

In addition, the number of parts can be reduced compared to the conventional one, and the calendar correction transmission wheel 7 only needs to be assembled into the guide shaft 1-a protruding from the bridge portion 1-c of the main plate 1, which simplifies the structure and improves work efficiency. can be improved and reduce manufacturing costs.

Furthermore, while reducing the inner diameter of the dial, the engagement part between the wheel wheel 4 and the winding stem 2 can be made longer than before, which increases the stability of the wheel wheel 4 and makes it easier for the wheel wheel 4 and the small iron wheel to hold together when setting the hands. 5 meshing becomes smooth.

[Effects of the invention] As described above, according to the invention, there is a winding stem which is an external operating member that can be moved by a predetermined amount in the axial direction, and a winding stem that is fitted into the winding stem to control its axial movement and rotation. The interlocking wheel, the calendar correction gear provided integrally on the circumferential surface of the watch center side flange of the wheel, and the shaft portion of which allows the interlocking within the guide groove which is the constriction of the wheel. A calendar correction transmission wheel is attached to a bridge portion of a clock frame that straddles the position and is provided in a direction perpendicular to the axle axis line, and the lower part of the tooth portion is set to be able to mesh with the calendar correction gear, and the shaft portion is connected to the calendar correction transmission wheel. It is movably fitted into a deformed hole formed in the clock frame along the wheel, and its teeth are always engaged with the upper part of the teeth of the calendar correction transmission wheel, and the rotation direction of the calendar correction transmission wheel is adjusted according to the direction of rotation of the calendar correction transmission wheel. The shaft portion is moved to one end or the other end of the deformed hole, and engages with the date wheel at one end of the deformed hole and with the day wheel at the other end of the deformed hole to correct the calendar. By being composed of a calendar correction wheel that transmits the rotational force of the transmission wheel to the date wheel or day wheel,
The calendar correction transmission wheel can be moved closer to the center of the watch and the winding shaft than in the past, making it smaller and thinner, reducing the number of parts, and lowering costs. While reducing the inner diameter, the engaging part between the wheel and winding stem can be made longer than before, which has the effect of increasing the stability of the wheel.

To explain specifically how much smaller and thinner we have achieved, compared to the conventional model shown in Figure 4, we were able to reduce the inner diameter of the dial by approximately 3 mm, and also reduced the thickness of the watch body by 0.3 mm. It became possible to do so.

[Brief explanation of the drawing]

FIG. 1 is a plan view showing a calendar correction mechanism according to an embodiment of the present invention. FIGS. 2 and 3 show sectional views of the main parts thereof. FIG. 4 is a sectional view of a conventional calendar correction mechanism. FIG. 5 is also a sectional view of a conventional calendar correction mechanism. 1... Main plate (clock frame), 1-a... Guide shaft (shaft of calendar correction transmission wheel), 1-b... Deformed hole, 1-c... Bridge part, 2... Winding stem, 4 ……
Wheel, 4-b... Calendar correction gear, 4-
c... Guide groove, 7... Calendar correction transmission wheel, 8
...Calendar correction wheel, 9...day wheel, 12...day wheel.

Claims (1)

[Scope of Claim for Utility Model Registration] A winding stem which is an external operating member that is movable by a predetermined amount in the axial direction, a wheel that is fitted into the winding stem and interlocks with its axial movement and rotation, and this winding stem. A calendar correction gear integrally provided on the circumferential surface of a flange on the clock center side of the hand wheel; and a bridge portion of the clock machine frame where the shaft portion straddles a position in the guide groove which is the constriction of the handwheel and allows the interlocking. a calendar correction transmission wheel which is arranged in a direction perpendicular to the axle axis line and whose lower part of the tooth part is set to be able to mesh with the calendar correction gear; It is movably inserted into the formed deformed hole, so that its teeth are always engaged with the upper part of the teeth of the calendar correction transmission wheel, and the shaft portion is inserted into one end of the deformed hole according to the rotational direction of the calendar correction transmission wheel. At the same time, the rotational force of the calendar correction transmission wheel is transferred to the date wheel side by engaging the date wheel side at one end position of the deformed hole and the day wheel side at the other end position of the deformed hole. A calendar correction mechanism for a watch, characterized by comprising a calendar correction wheel that transmits information to the day wheel side.