Solar-Powered Watch Winder with Light-Activated Static Display
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Solution Overview
Problem
Existing electric watch winders for automatic watches either cause accelerated wear due to permanent winding or fail to provide a static display option, which is preferred by watch enthusiasts.
Innovation Solution
A solar-powered electric winder with a control interface and microcontroller that selectively operates the winding mechanism based on light intensity, allowing for dynamic winding during display hours and static display during store opening hours, with programmable parameters for winding duration and number of revolutions tailored to specific watch models.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the support element is kept constantly moving to wind the automatic watch, then the watch is prevented from stopping and is wound, but the winding mechanism experiences accelerated wear
Solution Approach 1:
The electric motor is programmed to rotate the support element periodically rather than continuously. The rotation occurs in cycles: rotating for a predetermined time period to wind the watch, then stopping to allow the mainspring to partially unwind, and repeating this cycle. This periodic action prevents over-winding and reduces mechanical wear while maintaining reliable watch operation.
Solution Approach 2:
The system incorporates a light sensor that detects ambient light levels and provides feedback to the microcontroller. Based on this feedback, the microcontroller automatically adjusts the winding schedule - increasing rotation frequency when light levels indicate store closure (when static display is needed) and reducing rotation when light levels suggest store opening hours. This feedback mechanism optimizes both watch winding and display requirements.
2Adaptability or versatility
If the support element is kept constantly moving for dynamic display, then spectators see a dynamic presentation, but the watch cannot be displayed statically during store opening hours
Solution Approach 1:
The system dynamically adjusts its operation based on ambient light conditions. The microcontroller monitors light sensor input and automatically transitions between dynamic display mode (constant rotation) and static display mode (stopped or minimal rotation). This dynamic adaptability allows the same device to serve both dynamic presentation and static examination needs without manual intervention.
Solution Approach 2:
The system uses the ambient light environment as a natural trigger for mode switching. The light sensor continuously monitors lighting conditions, and when store opening hours are detected (increased ambient light), the system automatically transitions to static display mode. This self-service approach eliminates the need for manual control while adapting to the retail environment.
3Reliability
If permanent winding is used to prevent watch stopping, then the watch remains operational, but over-winding damage occurs
Solution Approach 1:
The electric motor rotates the support element for a predetermined time period, then stops for an equal or longer period. This periodic rotation prevents the mainspring from being continuously wound beyond its optimal tension point. The pause in rotation allows the spring to maintain appropriate tension without exceeding maximum winding limits, thereby preventing over-winding damage while keeping the watch operational.
Solution Approach 2:
Instead of providing continuous full-strength winding, the system applies partial winding action by limiting the rotation duration to a predetermined time period. This partial action is sufficient to keep the watch operational but deliberately insufficient to cause over-winding. The controlled limitation of winding action protects the mainspring while maintaining watch functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solar-powered electric winder effectively prevents over-winding, reduces wear on the mechanism, and allows for a static display during store hours, ensuring the watch is wound efficiently and displayed dynamically when needed.
Implementation Method 1
a solar cell arranged to charge the accumulator
Data Source
Figure 1~2
AI summary
The winder (1) has a motor module (9) to drive a removable rotative support (7), and an accumulator (15) to supply power to the motor. A photovoltaic cell (13) charges the accumulator. A light sensor (21) is connected to a clockwork microcontroller (19) that is connected to an internal clock and arranged to be controlled by the user. The support is driven only in the mode when the winder is illuminated and a driving program of the support is started in another mode at an hour previously selected by a control interface (23) of the microcontroller.