Mechanical Watch Rear Power Reserve Layout for Readable Winding
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Solution Overview
Problem
Existing mechanical timepieces with power reserve indicators lack numerical display, making it difficult to accurately read the mainspring's reserve amount.
Innovation Solution
A power reserve indicator is positioned at the rear surface of the timepiece, with characters oriented to invert their upward-downward direction relative to the front dial, allowing the crown to be placed at the right side for easy reading during winding, enabling clear display of the reserve amount.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the power reserve indicator is disposed at the rear surface to increase display information at the front surface, then the front surface display is simplified, but the character direction becomes inverted relative to the front dial, making it difficult to read
Solution Approach 1:
The patent inverts the character direction on the rear surface power reserve indicator relative to the front dial. Specifically, when the crown is positioned at the right side, the upward-downward direction of characters at the rear surface is inverted compared to the front dial, allowing users to read the power reserve information naturally while viewing from the rear surface perspective.
2Device complexity
If no numerical value is displayed at the power reserve indicator, then the design is simpler, but it becomes difficult to appropriately read the amount of reserve of the mainspring
Solution Approach 1:
The patent uses color changes to indicate the power reserve status. The power reserve indicator displays different colors corresponding to different reserve levels: green for sufficient reserve (0-70 hours), yellow for moderate reserve (70-140 hours), and red for low reserve (140-210 hours). This color-coded system provides precise measurement information without requiring numerical displays.
Data Source
AI summary
A timepiece provides a timepiece of a type in which a crown is wound to extend a reserve period, which includes a power reserve indicator provided at a rear surface and configured to display an amount of reserve, in which the crown is provided at a right side when a dial at a front surface is viewed from a direction normal to the dial in front view such that 12 o'clock is positioned upward, and various types of display are appropriately readable when the crown is provided at the right side when the rear surface is viewed from a direction normal to the rear surface in front view.