Timepiece Function Selection Lever Mechanism
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Solution Overview
Problem
Existing timepiece mechanisms with a three-position control stem face challenges in selecting and adjusting additional functions due to difficulty in reaching the intermediate position, leading to increased complexity and space constraints.
Innovation Solution
A device for selecting timepiece functions that includes a setting lever device with two setting levers and indexing devices, allowing for four configurations with a single interface element, enabling easier and more reliable selection of timepiece functions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a three-position control stem is used to adjust additional functions, then the timepiece can perform multiple functions, but the intermediate position is difficult to reach and the mechanism becomes complex
Solution Approach 1:
The patent divides the control mechanism into two independent setting levers instead of using a single complex multi-position stem. Each lever can be independently positioned to select different functions, simplifying the control structure while maintaining the ability to adjust multiple functions including time, date, and time zone
Solution Approach 2:
The two setting levers serve multiple functions: they select different adjustment modes (time, date, time zone), engage different adjustment trains, and provide tactile feedback through indexing positions. This universal design replaces the need for separate controls for each function
2Adaptability or versatility
If a fourth stem position is added to adjust another function, then more functions can be selected, but the travel of the stem increases and space requirements increase
Solution Approach 1:
Instead of extending the stem travel in one dimension (adding a fourth position), the patent transitions to a two-dimensional lever system where each lever can independently assume multiple positions. This dimensional change allows four functions to be selected with two levers having two positions each, reducing the space required compared to a single four-position stem
3Volume of moving object
If the travel between axial positions of the stem is reduced, then space requirements decrease, but it becomes trickier to select functions
Solution Approach 1:
The patent segments the function selection process into two independent lever operations rather than requiring precise positioning of a single stem. Each lever has clearly defined indexing positions that provide tactile feedback, making function selection easier while maintaining compact dimensions
Solution Approach 2:
The patent employs tactile indexing mechanisms that provide audible and tactile clicks when levers are positioned correctly, similar to how color changes provide visual feedback. This ensures easy function selection despite reduced travel distance, as users can clearly感知 when each lever is in the correct position
Data Source
AI summary
A device (200; 200′) for selecting timepiece functions, including a setting lever device (150; 150′) and a frame (100; 100′), the setting lever device (150; 150′) comprising-including a setting lever (2; 2′) mounted movably on the frame (100; 100′) and a lever (3; 3′) mounted movably on the frame (100; 100′) or on the setting lever (2; 2′), the selection device (200; 200′) also including a first position indexing device (4; 4′) arranged so as to act on the setting lever (2; 2′), and a second position indexing device (5; 5′) arranged so as to act on the lever (3; 3″).