Moon and Earth Phase Display Ring With Opposed Dial Apertures
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Solution Overview
Problem
Existing moon and Earth phase display devices in watchmaking complicate the watch movement and often require complex kinematics, making simultaneous display aesthetically desirable but mechanically challenging.
Innovation Solution
A device for displaying moon and Earth phases using a ring-shaped display with graphic representations driven by a drive mechanism, featuring a dial with diametrically opposed windows and a correction mechanism, allowing for sequential movement and minimal adaptation to existing watch designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a moon phase display device is integrated into a watch movement, then the aesthetic appeal is improved, but the device complexity increases
Solution Approach 1:
The patent combines moon phase display and Earth phase display into a single integrated mechanism. The display ring (110) contains both moon phase graphics (120) and Earth phase graphics (125), and a single drive mechanism drives both displays simultaneously, reducing overall device complexity while maintaining aesthetic appeal
Solution Approach 2:
The display ring serves multiple functions: it displays moon phases, displays Earth phases, and provides aesthetic decoration. The single drive mechanism performs multiple functions by driving both moon phase and Earth phase displays through different transmission paths, reducing the need for separate mechanisms
2Ease of manufacture
If simultaneous moon and Earth phase display is implemented, then the aesthetic appeal is improved, but the device complexity increases
Solution Approach 1:
The display ring is segmented into distinct functional zones: moon phase graphics (120) in one sector and Earth phase graphics (125) in another sector. The drive mechanism is segmented into separate transmission paths, with one path driving the moon phase display and another path driving the Earth phase display, allowing independent optimization of each kinematic chain
Solution Approach 2:
The patent introduces intermediate transmission elements (such as the transmission wheel 142 and drive finger 143) that mediate between the single drive mechanism and the two separate display systems. These intermediaries allow the single drive source to control both moon and Earth phase displays with different kinematic requirements without direct complex coupling
3Reliability
If a correction mechanism is added, then the reliability is improved, but the device complexity increases
Solution Approach 1:
The correction mechanism serves multiple functions: it can correct moon phase display errors, correct Earth phase display errors, and potentially reset the entire phase display system. By using a single correction mechanism with multiple functions, the patent avoids adding separate correction mechanisms for each display, thereby limiting the increase in device complexity
Data Source
Figure 1~2
AI summary
The invention relates to a display device (100) of a phase of the Moon and a phase of the Earth for a clock movement, comprising a display (110) including a plurality of graphic representations (120) symbolizing respectively different successive phases of a celestial body, a dial (130) having two apertures (131) arranged so as to simultaneously display two diametrically opposed graphic representations (120), one symbolizing a phase of the Moon and the other symbolizing a phase of the Earth, and a drive mechanism (140) configured to drive the display (110) in a sequential movement.