Watch Winding Stem with Selection Cam for Multi-Function Control
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Solution Overview
Problem
Existing timepieces face difficulties in efficiently adjusting multiple functions and time indications due to limited functionality and user confusion with existing mechanisms, such as the winding stem and rotating bezel solutions, which restrict the number of adjustable functions and indications.
Innovation Solution
A timepiece with a device featuring a two-position winding stem and a selection cam with n times two levels of states (0 and 1) for adjusting functions and time indications, where the selection is made using a rotating bezel, allowing for high numbers of adjustments without the need for additional push buttons or complex mechanisms, and utilizing a desmodromic connection between the cam and winding stem to enable multiple adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the number of positions of the winding stem is increased to adjust more functions, then the number of adjustable functions increases, but the user has difficulty memorizing the function of each position and knowing in which position the winding stem is
Solution Approach 1:
A selection cam with multiple lobes is introduced as an intermediary element between the winding stem and the multiple functions. Each lobe corresponds to a specific function, and when a lobe engages with the winding stem, it automatically selects that function. This mediator translates the simple rotational positions of the winding stem into specific function selections, eliminating the need for users to memorize positions.
Solution Approach 2:
Different lobes on the selection cam are provided with different visual characteristics (such as positioning markers or visual indicators) that allow users to easily identify which function is currently selected. This visual feedback mechanism helps users understand the current state without memorization, as they can simply observe which lobe is engaged.
2Adaptability or versatility
If independent push buttons are added to adjust additional time indications, then the number of adjustable indications increases, but the aesthetics of the watch is compromised
Solution Approach 1:
The winding stem is designed to perform multiple functions: winding the mainspring, setting time indications, and adjusting various complications. By making the winding stem universal and capable of interfacing with multiple functions through the selection cam mechanism, the patent eliminates the need for separate push buttons, thereby maintaining the watch's aesthetic appearance while increasing adjustability.
Solution Approach 2:
The patent merges the functions of multiple control elements (winding stem, selection mechanism, and multiple adjustment functions) into a single integrated system. The selection cam combines multiple function selection capabilities into one rotational component, and the winding stem serves as a universal control, consolidating what would otherwise require separate buttons into a unified aesthetic element.
3Adaptability or versatility
If a rotating bezel with annular toothing is used to set time functions, then one time function can be adjusted, but the bezel only makes it possible to adjust one of the functions mentioned
Solution Approach 1:
The selection cam is segmented into multiple lobes, with each lobe representing a different function or time indication. This segmentation allows a single rotational component (the winding stem) to access multiple functions by engaging with different lobes at different rotational positions, thereby increasing versatility without proportionally increasing overall mechanism complexity.
Solution Approach 2:
The patent adds a dimensional aspect to the control mechanism by using the radial dimension of the winding stem's rotation to select different functions. Instead of requiring separate axial movements or multiple independent controls, the system uses angular position in the rotational plane to select among multiple functions, effectively using another dimension of motion to increase capability.
Data Source
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AI summary
This timepiece is equipped with a function and timekeeping adjustment device comprising a selector (L) for each timekeeping indication to be set and an adjustment (T) for the selected timekeeping indications. At least the selector (L) for the indication to be set is kinematically linked to a selector cam (C1) having a profile corresponding to two state levels, 0, 1, corresponding respectively to a non-selection state and a selection state, the adjustment device comprising means (L1, L2, L3) for connecting the adjustment (T) to each of the selected timekeeping indications.