JPS6242385Y2 - - Google Patents

Description

[Detailed explanation of the idea] The present invention relates to a moon phase display type watch.

Traditionally, moon phase display watches were configured to display the moon phase wheel at a position offset from the pointer axis, which required a large gear train for deceleration to be installed between the hour wheel and the moon phase wheel. The problem was that the minute clock had to be thick, and in order to make it easier to see the phases of the moon, the phase wheel had to be made larger, making the entire clock larger.

In view of these problems, the present invention aims to provide a small and easy-to-read moon age display type timepiece.The details of the present invention will be explained below based on an illustrated embodiment.

FIG. 1 shows an embodiment of the present invention, in which reference numeral 1 denotes an annular ring with 29 teeth on the inner periphery so as to be driven by a date dial on a date wheel (not shown). It is a moon phase wheel, and on its surface a moon 2 whose waxing and waning is displayed by a dial 3 to be described later is drawn in a circle on a black background. The dial 3 mentioned above is the outer dial 4.
and an inner dial plate 5, the outer dial plate 4 is formed in an annular shape, and a time scale is provided on its surface.
The inner dial 5 has a disk shape that is eccentric with respect to the pointer axis, and 29 arcuate protrusions 6 are formed on its periphery, and the maximum distance between it and the outer dial 4 is A gap corresponding to the diameter of the moon 2 drawn on the lunar phase plate 1 is formed at several points between the connecting parts 7 in such a relationship that the smallest part contacts the outer dial plate 4. Therefore, it is integrally formed as one dial plate 3.

In this embodiment, when the moon phase wheel 1 rotates 1/29 from the state shown in FIG. It moves to the protrusion 6 part and partially covers it. Therefore, each day the moon 2 on the moon phase wheel wanes as shown in Figure 2, and the inner and outer dials 4,
At the position where 5 is in contact, it is a new moon, and by further rotation, the age of the moon is displayed by repeating that the moon 2 is full.

Although the above is an example in which the inner dial plate is eccentric, the same effect can be obtained even if the inner periphery of the outer dial plate 4 is eccentric.

As described above, according to the present invention, since the date dial on the date wheel is configured to rotationally drive the moon phase wheel, a gear train for deceleration can be omitted, making the watch thinner. In addition, since the moon phase is displayed using an annular moon phase wheel that rotates around the pointer shaft and a dial with a display section on the outer periphery, even a small watch can display the phases of the moon in a large size. Moreover, the number of days can be easily determined based on the position of the moon.

[Brief explanation of the drawing]

FIG. 1 is a plan view of a device showing an embodiment of the present invention, and FIG. 2 is an explanatory diagram of the operation of the device. 1... Moon phase wheel, 2... Moon drawn on the moon phase wheel, 4
...Outer dial, 5...Inner dial.

Claims (1)

[Scope of utility model registration request] A letter in which one of the outer and inner edges of the outer part and the inner part, both of which are eccentric with respect to the pointer axis, form an annular gap whose maximum corresponds to the diameter of the moon on the display vehicle and which is approximately zero at the minimum. The moon covered by one of the inner and outer edges is displayed on the surface of the plate, and 29 teeth are provided on the inner periphery of the dial, which is rotated by a date dial on the date wheel around the pointer shaft. A moon phase display clock consisting of a ring-shaped display wheel.