Moon And Earth Phase Display With Simplified Watch Kinematics
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Solution Overview
Problem
Moon and Earth phase displays in watchmaking add complexity to horological movements and concomitant display is desired for aesthetic reasons, while simplifying the kinematics is necessary.
Innovation Solution
A Moon phase and Earth phase display device with a drive mechanism and indicator members on a dial, where the position of the indicator members relative to graphical representations symbolizes the phases, utilizing an existing watch design with minimal adaptation, and a correction mechanism for easy phase correction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If Moon phase and Earth phase display devices are integrated into horological movements, then aesthetic display quality is improved, but device complexity increases
Solution Approach 1:
The patent combines Moon phase and Earth phase display functions into a single integrated device. The display mechanism uses a shared rotational framework where both indicator members (Moon and Earth) rotate simultaneously on the same dial, merging two separate display functions into one unified mechanism that reduces overall complexity while maintaining aesthetic quality.
Solution Approach 2:
The display device is designed with multi-functionality, where the same rotational mechanism serves dual purposes: indicating both Moon phase and Earth phase. The graphical representations on the dial serve multiple functions by representing different phases for both celestial bodies, allowing a single mechanism to perform multiple display functions.
2Ease of manufacture
If concomitant display of Moon and Earth phases is implemented, then aesthetic reasons are satisfied, but kinematic complexity increases
Solution Approach 1:
The kinematic system merges the Moon and Earth phase indication mechanisms by using a single rotational framework. Both indicator members share the same rotation axis and are driven by the same power source, eliminating the need for separate kinematic chains and reducing overall kinematic complexity while enabling concomitant display.
Solution Approach 2:
The display dial is segmented into distinct graphical representations for Moon and Earth phases, allowing independent visual identification while being driven by a unified mechanical system. This segmentation enables clear aesthetic display while maintaining mechanical simplicity through shared drive mechanism.
Data Source
AI summary
A Moon phase and Earth phase display device (100) for a horological movement, which display device includes a dial (130) on which is arranged a plurality of graphical representations (112) symbolizing respectively different successive phases of a celestial body, said display device (100) further including a drive mechanism (140) configured to move a display (110), the display (110) including at least two indicator members (111) of different appearances, configured to symbolise the Moon and the Earth respectively, so that the position of the indicator members (111) relative to the graphical representations (112) represents a Moon phase indication and an Earth phase indication respectively.