JPH0543430Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a timepiece that displays the time using a pattern drawn on a disc.

[Prior Art] In recent years, as watches have become more mature, demand for fashionable watches has also increased. In terms of wristwatches, more and more consumers are looking for colored watches and watches with designs that are different from conventional watches.

Conventional pointer display type watches display the time by fixing the hour and minute hands to a pointer shaft that protrudes from the dial.

However, as a result of searching and considering whether or not there was a unique watch, we found that the present applicant's U.S. Pat.
No. 43276, etc., has proposed a structure in which hour and minute hands are printed on two discs and the time is displayed by rotating the discs.

However, the former design of time display watches with hour and minute hands is all about devising the design of the dial and hands, and the time is only displayed by the angle of the hour and minute hands, so there is little fun in reading the time. do not have.

On the other hand, since the clock shown in Jitsugan No. 61-43276 uses two disks, there is little fun in reading the time if the hour and minute hands are simply printed. .

Therefore, various clocks that use a disc to display the time more interestingly have been proposed in Japanese Patent Application Laid-open No. 51-29165 and Japanese Utility Model Application No. 51-19859. Japanese Patent Application Laid-open No. 51-29165 discloses that when a disk has a hole,
A clock is disclosed in which the minutes are displayed through a hole in the hour disk by rotating the hour disk by 30 degrees and having a minute disk provided with minute numerals rotating by 330 degrees or 390 degrees per hour.

Further, Japanese Utility Model Publication No. 51-19859 discloses a timepiece in which an hour and minute display board is formed of discontinuous spiral arcs with different radii and is displayed through a hole in the dial.

[Problem that the invention attempts to solve]

However, in JP-A-51-29165, although it is interesting to display the elapsed minutes in the hole in the hour disk, the elapsed minutes are indicated numerically as before, and it is not a very interesting display method. It wasn't.

In addition, Utility Model Application Publication No. 51-19859 is unique in that it shows the passage of time by changing the area of the pattern, but the display part is a single small hole in the dial, so you can see the passage of time at a glance. It was not something that could be displayed clearly.

The purpose of the present invention is to provide a clock that displays the time using a pattern to make it more interesting by changing the display method by simply changing the structure, and that allows the user to grasp the passage of time at a glance.

[Means for solving problems]

The structure of the present invention to achieve the above purpose is as follows:
It is a disc display type watch that displays the time using a pattern formed on a disc, and includes a minute pinion to which power is transmitted via a wheel train, an hour wheel driven from the minute pinion through a reduction gear train, and the minute pinion. a minute display plate fixed to the
and an hour display plate fixed to the hour wheel, and the hour wheel displays 390 degrees per hour, or the hour wheel displays 330 degrees per hour. In the timepiece having the gear train that rotates by -30° per hour, two Archimedean curves are provided on the minute display plate and are formed point-symmetrically with respect to the center of the minute display plate; A minute display pattern is formed by connecting the ends of the curved lines along the outer periphery of the minute display plate, and furthermore, on the line corresponding to the hour display position of the hour display board, there is a line bordering the center of the hour display board. By providing an hourglass-shaped minute display section with a design different from the minute display design,
The device is characterized in that the passage of minutes is displayed by changing the area of the minute display pattern overlapping the minute display section.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings. FIG. 4 is a sectional view of a main part of a movement according to an embodiment of the present invention.

In FIG. 4, 1 is a rotor, and rotor 1
A two-pole step motor is constituted by a magnet 11 fixed to the motor, a yoke 12, and a coil (not shown). The rotor 1 has a gear train bridge 13 and a main plate 14
The rotor 1 is rotated by the fourth wheel & pinion 2, which is supported by the train wheel bridge 13 and the main plate 14, and by the third wheel & pinion, which is supported by the middle bridge 10 and the main plate 14. 3 and the minute kana 4
can be conveyed to. The dividing plate seat 7 is fitted into the minute pinion 4 and drives the minute display plate 19 which is engaged with the irregularly shaped portion 7a of the dividing plate seat 7.

Further, the rotation transmitted to the minute pinion 4 rotates the hour wheel 6 via the hour wheel 5, and drives the hour display plate 22 which is engaged with the plurality of convex portions 6a of the hour wheel 6.

Here, the time of the hour wheel 6 is determined by the main plate 14 and the dial plate 15, and the time of the minute display plate 19 is determined by the head 6b of the hour wheel 6 and the lower part 7b of the dividing plate seat 7. Further, the time display plate 22 is determined by the middle part 6c of the hour wheel 6 and the middle part 7c of the dividing plate seat 7.

Further, 16 is a windshield, which is placed close to the tip of the minute pinion 4.

FIG. 1 is an assembled plan view of the embodiment of the present invention, and FIG. 2 is a plan view of the minute display plate 19 of the embodiment of FIG.
It is engaged with the dividing seat 7 by a.

In addition, two Archimedean curves 20 and 21 are provided on the transparent background 19c, and their ends are connected to the minute display plate 1.
The minute display pattern 19d is connected along the outer periphery of the hour display plate 9, and printed in the same color as the hour display plate 9 on the inside thereof. The positions of the two Archimedean curves 20 and 21 are point symmetrical with respect to the center of the minute display plate 19.

FIG. 3 is a plan view of the hour display plate 22, in which a triangular mark 17 is provided at the hour display position, and on the line corresponding to the hour display position, the hour display plate 22 is
An hourglass-shaped window portion 22a is provided with a pattern different from the minute display pattern 19d, with the center as a border. In this embodiment, it is a transparent window. Further, 22b is a hole portion, and is engaged with the hour wheel 6 through the plurality of hole portions 22b.

When the minute display plate 19 and hour display plate 22 shown in FIGS. 2 and 3 are attached to the minute pinion 4 and the hour wheel 6 as described above, a time display like the hourglass shown in FIG. 1 becomes possible. The hour display plate 22 rotates once every 12 hours, like the hour hand of a conventional watch, and the triangular mark 17 indicates the hour position. On the other hand, the minute display plate 19 has a transparent base 19c outside the Archimedean curves 20, 21, so the hour display plate 22 can be seen from that part as it is, but the minute display pattern 19d inside the Archimedes curves 20, 21 is not visible on the hour display plate 22. Since the sand covers the window portions 22a of the window portions 22a, the sand appears to move from one window portion 22a to the other window portion 22a every 30 minutes, allowing the user to know the passage of time.

In the above embodiment, the positions of the minute display board and the hour display board must always be the same every hour on the hour, and the relative angles of the minute display board and the hour display board must correspond to the passage of minutes. Set the number of gear train teeth as shown below so that the minute display plate rotates 390°/hour and the hour display plate rotates 30°/hour.

The number of teeth of the rotor 1 in Fig. 4 is 8, and the fourth wheel & pinion 2
The number of teeth on the gear is 64, and the number of teeth on the pinion is 8. The number of teeth on the third wheel 3 is 30, and the number of teeth on the pinion is 13. The number of teeth on the minute pinion 4 is 36, and the number of teeth on the pinion is 8. The number of teeth on the gear of Hinokuraguruma 5 is 26, and the number of teeth on the pinion is 9. Hour wheel 6
The number of teeth is 36.

The rotation of rotor 1 is decelerated to 8/64 x 8/30 x 13/36 = 13/1080 up to minute pinion 4 by each reduction gear train mentioned above, and from minute pinion 4 to hour wheel 8/26 x 9/36 = The speed is now reduced to 1/13. During normal use, rotor 1 is driven one step every 20 seconds, and since the rotor has two poles, each step
Rotate 180°/20 seconds. The minute kana 4 mentioned above rotates 180/20 x 60 x 60 x 13/1080 = 390 degrees in one hour.

Further, the hour wheel 6 is configured to rotate 390° x 8/26 x 9/36 = 30°. As mentioned above, the hour display board 2
2 rotates 30 degrees every hour, and the minute display plate 19 rotates 390 degrees every hour.

Here, if the elapsed time from a certain hour is N (minutes), the hour display plate 22 rotates (30° x N/60) degrees in N minutes, and the minute display plate 19 rotates (390° x N/60). ° Rotate.

The relative angle between the hour display plate 22 and the minute display plate 19 is (390/60 - 30/60)°N = 6°N, so when N = 60 (minutes), 6° x 60 = 360°. The positions of the hour display board 22 and minute display board 19 are always the same every hour on the hour.For example, 15 minutes after the hour, the angle between the hour display board 22 and the minute display board 19 becomes 90°, and 30 minutes after the hour. 180° later
become.

In addition, when implementing the present invention, it is also possible to place the hour display plate on the windshield side and the minute display plate on the dial side by slightly changing the gear train.

In addition, by rotating the hour display board counterclockwise to -30° per hour and rotating the minute display board 330° per hour, the difference between the hour display board and minute display board at the hour can be adjusted. The positions can be made to match.

At this time, operations such as slightly changing the number of teeth or inserting an idler wheel are necessary.

Furthermore, if the minute display plate is rotated 210 degrees per hour,
It is also possible to match the positions of the hour display and minute display every two hours.

[Effect of idea]

As explained above, according to the present invention, changes in time can be displayed using the unique structure of changing the hourglass pattern using two disks, making the display easy to understand.
In addition, it becomes possible to display the time on a clock that is more fun to look at than ever before.

[Brief explanation of the drawing]

Fig. 1 is a plan view of a watch according to an embodiment of the present invention, Figs. 2 and 3 are plan views showing the minute display plate and hour display plate of Fig. 1, and Fig. 4 is a plan view of a watch according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the main parts of the movement. 1... Rotor, 2... Fourth wheel, 3... Third wheel,
4...minute kana, 5...hi no uraguruma, 6...tsutsukura, 7
...Division plate, 19...Minute display plate, 20, 21...
Archimedes curve, 22...hour display board.

Claims (1)

[Scope of utility model registration request] It is a disc display type watch that displays the time using a pattern formed on a disc, and includes a minute pinion to which power is transmitted via a wheel train, an hour wheel driven from the minute pinion through a reduction gear train, and the minute pinion. It consists of a minute display board fixed to the hour wheel, and an hour display board fixed to the hour wheel, and the minute kana is 390 degrees per hour, and the hour wheel is 30 degrees per hour. In the watch having the gear train in which the hour wheel rotates by -30 degrees per hour by 330 degrees per hour, on the minute display plate there are two clocks formed point-symmetrically with respect to the center of the minute display plate. A minute display pattern is constructed by providing an Archimedean curve and connecting the ends of the Archimedes curve along the outer periphery of the minute display plate, and furthermore, on the line corresponding to the hour display position of the hour display board, By providing an hourglass-shaped minute display section with a pattern different from the minute display pattern with the center of the hour display board as a border, the passage of minutes can be indicated by changes in the area of the minute display pattern overlapping the minute display section. A disc display type clock characterized by a display.