JPH0827357B2 - Clock date display structure - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial application] The present invention relates to a structure of a date display portion of a timepiece.

[Conventional technology]

Due to the remarkable development of the technology of thinning and miniaturizing timepieces, the movement of three hands in modern watches, especially wristwatches, regardless of man or woman's size, is limited to high-end products with a thickness of 2 m / m or less. Instead, it came to the market until it became a popular item.

Further, due to the development of mass production technology, the cost reduction due to the rationalization of the line is more effectively performed for the models with larger production quantities. Even in the case of watches with a date display, conventionally, by placing the parts of the date display part on top of the basic movement, the number of basic movement models can be reduced as much as possible to improve mass productivity and reduce costs. Trying to get.

[Problems to be solved by the invention]

However, in the case of a timepiece with a date display, the movement becomes thicker by superposing the parts of the date display section on the basic movement. Although the date display parts themselves have been made thinner, the functional thickness of the date display part is limited to about 0.5m / m, and it is still 0m / m in relation to the movement thickness. Does not exist and must be added to the basic movement by the thickness of the date display.

For this reason, watches with date display must be thicker than the basic movement.

An object of the present invention is to provide a timepiece structure which has the same thickness as the basic movement but can be provided with a date display mechanism.

[Means for solving problems]

The configuration of the present invention for achieving the above object includes a train wheel for transmitting power from a drive source, a wheel wheel for transmitting power of the wheel train to an hour hand, and a timepiece substrate for holding the wheel wheel and the wheel wheel. Date display of a watch having a movement, a winding stem arranged on the watch substrate as an external operation member, a date dial for displaying the date, and a date driving wheel for transmitting the rotation of the hour wheel to the date dial. In the structure, the movement has a date driving wheel for transmitting the rotation of the hour wheel to the outer peripheral side of the movement on the side of the timepiece substrate on which the winding stem is disposed, and the date driving wheel has the winding stem. Is arranged at a position opposite to the timepiece substrate side with respect to the timepiece, and is arranged on the outer periphery of the movement, and is configured to rotate by meshing with the date driving wheel. It is placed on the side of the watch substrate as a boundary Ri, the date plate is characterized to be driven through the day feed wheel that meshes with the date indicator driving wheel and 該日 plate.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

1 is a plan view of a watch according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, and FIG. 3 is a sectional view taken along line BB of FIG.
FIG. 4 is a sectional view taken along the line CC of FIG. The reference numeral 1 is a movement of three female hands which is called 5 1/2 inches in size, and has a main plate 21 as a clock substrate, a wheel train including a Hino back wheel 10 for transmitting power from a driving source, Hino. The hour wheel 13 that transmits the power from the back wheel 10 to the hour hand, the wheel train bridge 14 that supports the wheel train, and the center wheel
15, winding stem 20 as external operation member, mandarin duck 27 and back presser
It is composed of a backing mechanism such as 28, a converter including a coil 19, a circuit block including a circuit chip 17, a crystal oscillator 18, a circuit board 16 and the like, a winding stem spacer 24, a battery 23 and the like. Reference numerals 11 and 12 are the daily driving wheels (I) and (II), and the daily driving wheel (I) 11 meshes with the Hinoura vehicle 10 of the movement 1, and the daily driving wheel (II) 12 is the sun. It is meshing with the wheel-carrying wheel (I) 11, and the wheel-carrying wheel (II) 12
One end of is provided so as to protrude from the outer diameter of the movement 1. The day driving wheel (I) 11 and the day driving wheel (II) 12 are held between the main plate 21 and the winding stem spacer 24 of the movement 1, and the shafts 21a, 2 provided on the main plate 21 are held.
It is additionally designed to the existing basic movement 1 so as to rotate around 1b. A second base plate 2 made of plastic is provided so as to surround the outer periphery of the movement 1, and is connected to the movement 1 by a hook (not shown) or the like by the elastic force of the plastic. Reference numeral 8 denotes a date driving transmission wheel (III), which is rotatably supported by a shaft 2a provided on the second main plate 2, and its tooth portion 8a has an upper portion thereof with a date driving transmission wheel (II) 12 and a lower portion thereof having a date. It meshes with the internal gear portion 4a of the turning wheel 4. The date indicator driving wheel 4 is adapted to rotate around the outer periphery of the movement 1, and the rotation speed is such that the internal gear portion 4a of the date indicator driving wheel 4 has 240 teeth and the minute pinion 22 has 10 teeth. No Ura 10, a daily driving car (I),
Since (II), (III) 11, 12, and 8 are all idlers, they are decelerated to 1/24 and the minute pinion 22 is 1 rotation / 1 hour, so the date indicator driving wheel 4 is 1 rotation / 1. It's going to be a day. Further, 9 is a date driving wheel presser, and the date driving wheel 4 is held by the second main plate 2 and the date driving wheel presser 9. 7 is a date feeding wheel, which is pivotally supported by a shaft 2b provided on the second main plate 2. The date feeding wheel 7 is provided with an upper tooth portion 7a that meshes with the tooth portion 3a of the date dial 3, and a lower tooth portion 7b that meshes with a protrusion 4b provided at one position of the gear portion 4a of the date indicator driving wheel 4. The number of teeth of each of the upper tooth portion 7a and the lower tooth portion 7b is 5, and the tooth top of the upper tooth portion 7a and the tooth tip of the lower tooth portion 7b, and the tooth bottom and the lower tooth portion of the upper tooth portion 7a are included.
The tooth bottoms of 7b are in the same position, and the upper teeth 7a normally sandwich the teeth 3a of the date dial 3, and the lower teeth 7b of the date feeding wheel 7 are the date driving wheel. It is arranged so as to come to a position where it engages with the convex portion 4b of No. 4 of FIG. Day driving wheel 4 is 1 per day
The protrusion 4b of the date indicator driving wheel 4 meshes with the lower tooth portion 7b of the date indicator driving wheel 7 to rotate about one tooth of the date indicator driving wheel 7. As a result, the other upper tooth portion 7a of the date feeding wheel 7 rotates the tooth portion 3a of the date dial 3 and rotates the tooth portion 3a of the date dial 3 by about one tooth. As a result, the date printed on the date board 3 is sent by one day. Reference numeral 6 is a day shift control lever, and the tip portion 6a thereof is a tooth portion 3a of the date plate 3.
And the position regulation of the date feeding wheel 7 and the date board 3 at the normal time are performed and the feed pitch amount at the time of date feeding is compensated.

This has the same function as the date feeding mechanism of the conventional timepiece with a date display.

Further, the tooth portion 3 a of the date dial 3, the date driving transmission wheel (III) 8, the date feeding wheel 7, and the date jump control lever 6 are held by the date dial retainer 5. The date plate retainer 5 is fixed to the second main plate 2 with screws (not shown).

20 is a winding stem (I), the central portion of which is held by the main plate 21 of the basic movement 1, the winding stem spacer 24, and the like,
The mandrel 27 and the back presser 28 are engaged.

An escape groove portion 20a is provided on the outer peripheral portion of the winding stem (I) 20 to have a small diameter shape. In the upper part of the escape groove 20a, the date plate 3
The tooth portion 3a, the date jump control lever 6 and the date feeding wheel feeding portion projection 4b of the date indicator driving wheel 4 at the lower portion of the escape groove portion 20a are cross-sectionally escaped to avoid an increase in thickness due to overlapping. . This is due to the thinning of the module in recent years, and its exterior is also becoming thinner. Due to its structure, it is necessary to align the back cover with the side below the winding stem in a normal exterior structure. Therefore, in the thin movement, the cross-sectional position of the surface is set to the dial side as much as possible to secure the biting part between the back cover and the side,
Moreover, the gap between the movement and the back cover does not become large.

Also in the case of the present invention, the position of the winding stem is arranged as close to the dial plate 26 side as possible, and the second main plate 2 for holding the winding stem (I) 20.
2c (Fig. 4) is about 0.2 to 0.3 mm, and it is impossible to dispose the tooth part 3a of the date plate 3 and the date plate retainer 5 in this gap, but the winding stem (I) By providing the escape groove portion 20a in the portion 20, the date dial tooth portion 3a and the date dial retainer 5 can be arranged in an overlapping manner.

A joint portion 20b is provided on the outer peripheral portion and is connected to a crown (not shown) from the outside of the side to set the winding stem (II) 25.
Is jointed with. Also, the winding true (II) 25 is the second
The upper and lower parts are held by the base plate 2. By winding the crown, the winding stem (I) 20 performs the required operation via the winding stem (II) 25. Further, the winding stem (I) 20 is assembled before the date display members such as the date plate 3, date jump control lever 6, date plate presser 5 and the like are assembled. Not at the joint 20b, crown and winding true (II) 25
It suffices to attach / detach from the side, and it is not necessary to attach / detach the winding stem (I) 20. The date display member 20 prevents the winding stem (I) 20 from causing trouble such as breakage when the winding stem is attached to or detached from the movement.

As described above, the movement 1 has the date driving wheels 8, 11, 12 for transmitting the rotation of the hour wheel 13 to the outer peripheral side of the movement 1 on the timepiece substrate side where the winding stems 20, 25 are arranged. ,
The date indicator driving wheel 4 is arranged at the position opposite to the timepiece substrate 21 side with the winding stems 20 and 25 as a boundary, and is arranged on the outer periphery of the movement 1, and is configured to rotate in mesh with the date indicator transmitting wheel 8. The date dial 3 is arranged on the timepiece substrate 21 side with the winding stems 20 and 25 as a boundary, and the date dial 3 is driven via the date feeding wheel 7 that meshes with the date dial 3 and the date driving wheel 4. Therefore, it can be made thinner than the timepiece structure in which the date display mechanism is directly mounted on the movement.

〔The invention's effect〕

As described above, according to the present invention, by arranging the date indicator driving wheel and the date plate on the outer peripheral portion of the relatively small female movement of the pointer display type timepiece, the thickness of the date display section can be adjusted only by the pointer display type. It is possible to make it the same thickness as the movement.

In addition, the date plate above and below the winding stem of the basic movement,
The date driving wheel is arranged, and the date driving wheel and date board are set in a plane different from the winding stem. Can be used effectively. Further, by providing an escape groove for the date display member in the winding stem (I) 20, more efficient arrangement is possible, and the joint winding stem prevents the date display member from being damaged by the groove portion when the winding stem is attached or detached. ing.

Furthermore, since the second main plate is connected to the basic module and only the date display member is provided, there is no need to newly set up a clock with a date display, and a slight modification of the basic module is necessary, so there is a possibility of quantity advantage, There is also a cost reduction effect due to the mass production effect.

[Brief description of drawings]

1 is a plan view of a timepiece according to an embodiment of the present invention, FIG. 2 is a sectional view taken along line AA of FIG. 1, FIG. 3 is a sectional view taken along line BB of FIG. 1, and FIG. It is CC sectional drawing of a figure. 1 ... Movement, 2nd second plate, 3 ... Date plate, 4
...... Day indicator wheel, 5 ...... Date plate retainer, 6 ...... Day shift control lever,
7 …… Day feed car, 10 …… Hino back car, 11,12,8 …… Day rotation transmission car (I), (II), (III), 22 …… Minana, 21
…… Main plate, 14 …… Train wheel bridge, 15 …… Center bridge, 16 …… Circuit board, 19 …… Coil, 20 …… Makisumi (I), 25 …… Makisumi (I
I), 27 …… Oshidori, 28 …… Uraoshie.

Claims (1)

[Claims] 1. A wheel train for transmitting power from a drive source, a hour wheel for transmitting power of the wheel train to an hour hand, a movement having a timepiece substrate for holding the wheel wheel and hour wheel, and the external operation member. In a date display structure of a timepiece having a winding stem arranged on a timepiece substrate, a date dial for displaying the date, and a date driving wheel for transmitting the rotation of the hour wheel to the date dial, the movement includes the winding wheel. On the side of the timepiece substrate on which the true is arranged, there is a date driving wheel for transmitting the rotation of the hour wheel to the outer peripheral side of the movement, and the date driving wheel is on the side of the clock substrate with the winding stem as a boundary. Is arranged on the opposite side to the outer periphery of the movement, and is configured to rotate by meshing with the date driving wheel, and the date plate is arranged on the timepiece substrate side with the winding stem as a boundary. The date plate is placed in front of the date plate. Date structure of the timepiece, characterized in that it is driven through the day feed wheel that meshes with the date indicator driving wheel.