JPS5883288A - Calendar corrector for timepiece - Google Patents

Abstract

PURPOSE:To provide a calendar corrector of a small size, simple construction and high reliability by using a clutch wheel which is toothed only on one side, forming the other parts into simple shapes of assembling type, and eliminating such position restrictions as to dispose a setting wheel and a calendar correcting intermediate wheel body on both sides of the clutch wheel because a calendar correcting intermediate wheel is always in a home position. CONSTITUTION:A clutch wheel 13 has a crown gear wheel 13a only on one side and if a winding stem 12 is put into a calendar correcting state shown by alternate long and two short dashes lines by pulling the stem 12 with a selecting mechanism consisting of a setting lever 14 and a clutch lever 15 in accordance with the push and pull operations of the winding stem 12, the stem 12 stabilizes in the position 12' and a calendar correcting intermediate wheel 17 engages frictionally with the large diameter part 13c' of the stem 12'. At this time, the wheel 13 is not meshed with a minute wheel body 16. When the stem 12' is rotated left, a day correcting finger 21b moves in the direction of engaging with an hour wheel 22, and further when the stem 12' is rotated, a hexagonal hole 21a and an eccentric pin 19a slip with each other, and the finger 21b moves back and forth deformedly as shown by an arrow and pushes the wheel 22, thereby correcting the same quickly.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the structure of a calendar correction device for correcting a calendar by rotating a winding stem in a power calendar watch.

Many devices have been proposed to correct the calendar, but
Among them, an eccentric pin is integrally formed in a part of the calendar correction wheel at a position eccentric to the rotation center of the calendar correction wheel, and a calendar correction member that frictionally engages with the eccentric pin is used to correct the calendar. The constructed calendar correction device is extremely reliable and is therefore widely used.

However, conventional structures have many obstacles to achieving thinner, smaller, and lower cost designs, and new ideas are needed. FIG. 1 is a plan view of the structure of a conventional calendar correction device, which is an improved calendar correction device of the present invention, and FIG. 2 is a sectional view of the main part of FIG. 1.

The tension wheel 2 that engages with the corner 1a of the winding stem 1 has crown gears 2a and 2b on both sides, and is rotated according to the axial position by pushing and pulling the winding stem 1 by a well-known mechanism of a mandarin duck 6 and a cannula 4. is positioned, and meshes with the small gear 6a of the small iron wheel 5 or the calendar correction transmission body 6.

Regarding the calendar correction transmission body 6, the small gear 6a and the dog gear 6b
are integrated with each other by sandwiching the back pressing plate 7, and are configured to engage and rotate with the back pressing plate 7 at the intermediate portion 6c.
The large gear 6b meshes with a stop wheel 8 rotatably fixed to the back press plate 7.

An eccentric pier 8a is integrally formed in a part of the registration stop wheel 8 at a position eccentric to the center of rotation of the registration stop wheel 8, and a hexagonal hole 9a of the registration stop wheel 9 is in frictional engagement with the eccentric pin 8a. It matches. The solid lines in FIGS. 1 and 2 indicate the state during normal movement, and the two-dot chain line indicates the state during shoe correction. When the winding stem 1 is rotated in the normal hand movement state, the thrush wheel 2 that engages with the corner 1a of the winding stem 1 rotates, but the small iron wheel 5 and the wear correction transmission body 6 do not rotate. When winding stem 1 is pulled to bring it to the calendar correction state indicated by the two-dot chain line, winding stem 1 becomes winding stem 1', and Tsuzumi wheel 2
The crown gear portion 2a meshes with the small gear 6a of the wear correction transmission wheel body 6 and is positioned at the position 2' by a well-known switching mechanism comprising a mandrel 6 and a cannon 4.

In this state, when the winding stem 1' is turned counterclockwise, the shoe correction transmission body 6
The adjustment stop wheel 8 is rotated to the right via the , and the adjustment member 9 frictionally engaged with the eccentric pin 8a is moved in the direction of the head wheel 10 to quickly adjust the head wheel 10.

Next, when the winding stem 1' is rotated clockwise, the shoe adjustment member 9 moves to the day wheel 1.
It is moved in one direction and the day wheel 11 is quickly corrected. The operation of the shoe correction member 9 described above is the same as in the embodiment of the present invention, and will be described in detail later. As mentioned above,
Since it is necessary to place the adjustment stop wheel 8 inside the mouth wheel 10 via the wheel correction transmission body 6, which must be disposed on the outer circumferential side of the Tsuzumi wheel 2, the adjustment transmission is carried out by sandwiching the rear presser plate 7. The small gear 6a and large gear 6b of the car body 6 must be assembled, making the structure complicated, the thickness from the winding stem 1 to the date dial 10 is thick, and the plane space is large. There were many aspects that did not pander to the direction of cost reduction.

The present invention aims to eliminate these drawbacks and provide a highly reliable early calendar correction device that is small in size and simple in structure.

Hereinafter, the present invention will be explained in detail with reference to the drawings.

FIG. 3 is a plan view of a wristwatch correction device according to an embodiment of the present invention, and FIG. 4 is a sectional view of a main part of FIG. 3.

A winding wheel 16 is provided at a corner 12a of the winding stem 12, which is configured to be set at a plurality of positions in the axial direction, and a large diameter portion 12 is provided.
A wear correction transmission wheel 17 is inserted into each intermediate portion 12b having a diameter c.

The stopper wheel 16 has a crown gear 13a only on one side, and is positioned by a switching mechanism consisting of a well-known mandrel 14 and a cannula 15 in conjunction with the push-pull operation of the winding stem 12, and meshes with the end wheel body 16. The wear correction transmission wheel 17 is made of a plastic material, is inserted into the groove 18a of the spacer 18, and is held with a suitable gap to restrict movement in the direction of movement of the winding stem 12. The wear correction transmission wheel 17 is the winding stem 1
The large-diameter portion 12c of No. 2 directly frictionally engages with the winding stem 12 at a predetermined position during the travel stroke and transmits the torque necessary for shoe correction from the winding stem 12, but other than the large-diameter portion 12c It fits loosely into the middle part. The large diameter portion 12c has four cut portions 12d on its outer periphery to stabilize the frictional engagement with the stopper wheel.

The adjustment stop wheel 19, which meshes with the adjustment transmission wheel 17 while changing its rotational direction at right angles, engages with the boss 20a of the base plate 20 as a rotation axis. Further, the adjustment stop wheel 19 has an eccentric pin 19a in a part thereof at a position eccentric to the center of rotation, and a hexagonal hole 21a of the adjustment member 21 is frictionally engaged with the eccentric pin 19a.

The shoe correction member 21 has a day correction claw 21b and a day correction claw 21.
c is also integrally formed, and engages with the date wheel 22 and the day wheel 26, respectively, by movement of the shoe correction member 21. The solid lines in FIGS. 3 and 4 indicate the state during normal movement, and the two-dot chain line indicates the state during shoe correction. When the winding stem 12 is rotated during normal hand movement, the dial wheel 16 that engages with the corner 12a of the winding stem 12 also rotates, but since it is not engaged with the rear wheel body 16, it idles and one-way shoe correction is performed. The transmission wheel 17 is the winding stem 1
Since it is not engaged with the large diameter portion 12e of No. 2, it does not rotate.

Next, when the winding stem 12 is pulled to reach the calendar correction state shown by the two-dot chain line, the winding stem 12 is stabilized at the 12' position by a well-known switching mechanism consisting of a mandarin duck 14 and a cannula 15, and the wear correction transmission wheel 17 frictionally engages with the large diameter portion 12c' of the winding stem 12'. At this time, the Tsuzumi car 16 is the Hinura car body 16.
It doesn't mesh well.

When the winding stem 12' is rotated counterclockwise, the mounting stop wheel 19 is rotated clockwise via the shoe correction transmission wheel 17, and the shoe correction member 21 is rotated clockwise via the shoe correction transmission wheel 17.
Due to the frictional engagement with 9a, the date adjustment pawl 21b moves to the mouth wheel 22.
It moves in the direction where it engages with. When the winding stem 12' is further rotated even when the shoe adjustment member 21 hits the date wheel 22, the space between the hexagonal hole 21a and the eccentric pin 19a slips, and the date adjustment pawl 21b undergoes a deformed reciprocating movement as shown by the arrows in FIG. Then press the date indicator 22 to quickly correct this.

Next, when the winding stem 12' is rotated clockwise, the setting stop wheel 19 is rotated counterclockwise, and the setting adjustment member 21 moves in the direction in which the day adjustment pawl 21c engages with the day wheel 26. Even if the shoe adjustment member 21 hits the day wheel 26, if the winding stem 12' is rotated one more turn, the space between the hexagonal hole 21a and the eccentric character /19B will slip, and the day adjustment claw 21c will be deformed as shown in FIG. Make a reciprocating motion to pull the day wheel and quickly correct this.

When the winding stem 12' is pulled further, the needle is adjusted as shown in FIG.
are respectively set at the 12c" position, and the wear correction transmission wheel 1
The frictional engagement relationship with 7 disappears. Also, Tsuzumi car 16 is 1
6'' position, and the crown gear 13a'' meshes with the rear wheel body 16.

When the winding stem 12'' is rotated, the dial wheel body 16 is rotated by the dial wheel 16#, and the well-known pointer correction is performed.At this time, the shoe correction transmission wheel 17 does not rotate.

As described above, the calendar correction device according to the present invention
6 is a gear on only one side, and the other parts are built-in and have a simple shape, and all of them can be made of plastic, which contributes to cost reduction. In addition, the wear correction transmission wheel 17
Since it is always in the fixed position, the Tsuzumi wheel 20
Positional constraints such as having to arrange the small iron car 5 and the correction transmission body 6 on both sides are also eliminated.゛As a result, by arranging the registration stop wheel 19 so as to overlap the adjustment wheel 16 in a plane, even if the registration stop wheel 19 is engaged with the registration stop wheel 19 immediately from the registration transmission wheel 17, the shoe correction member can be accommodated inside the batten. Because of this, it can be made smaller and thinner as shown in FIG. 4. In the above-mentioned embodiment, since the winding stem 12 and the wear correction transmission wheel are held together by a friction fit between metal and plastic, the date indicator 22,
If there is an abnormality in the operation of the day wheel 26, it will slip,
Has a safety effect. This was further developed by making the date dial 240, the day dial 24a, and the day dial 24b, which move the date wheel 22 and week wheel 26 once a day according to the normal hand movement, into rigid bodies. This shows that even when the calendar year is corrected when the wheel 23 is engaged with the date dial 24a or the day dial 24b, no parts are damaged, and in that sense, the effect is great. (However, in the embodiment of the present invention,
As shown in FIG. 3, only the day-turning claw 24b is made into a rigid body,
Furthermore, a spring portion 21d is attached to the day correction claw 21c of the shoe correction member.
Since this is provided, safety is maintained even by the deformation of the spring portion 21d. )

[Brief explanation of the drawing]

Fig. 1 is a plan view of a conventional example of a calendar correction device, Fig. 2 is a sectional view of the main part of Fig. 1, Fig. 3 is a plan view of the embodiment of the present invention, and Fig. 4 is a sectional view of the main part of Fig. 3. FIG. 5 is a plan view showing the head wheel correction operation of the present invention, FIG. 6 is a plan view showing the day wheel correction operation of the present invention, and FIG. 7 is a sectional view of a main part of the hand correction state of the present invention. 12... Winding stem 16... Layer correction transmission wheel 19... Layer stop wheel 19a... Eccentric pin 21... Shoe correction member 22・・・・・・Day wheel 26・・・・・・Week wheel Figure 4 Figure 2

Claims (1)

[Claims] A winding stem that has a large-diameter portion in part and is configured to be able to be set at multiple positions in the axial direction; A calendar correction transmission wheel configured to directly engage with the main part to transmit the rotation of the winding stem, and a calendar correction transmission wheel configured to always mesh with the calendar correction transmission wheel and relative to its own rotation center. a calendar correction wheel having an eccentric pin provided at an eccentric position; and the calendar correction wheel frictionally engages with the eccentric pin, and when the calendar correction wheel rotates, it moves according to the direction of rotation to adjust the date wheel or the week wheel. A calendar correction device for a timepiece, comprising a calendar correction member that engages with one side of the calendar and corrects the calendar.