Sliding Wheel Display Switching in Compact Horological Mechanisms
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Solution Overview
Problem
Existing horological mechanisms for switching between different displays in timepieces require significant space due to additional mechanisms and trains, and are often limited to a single application, making it difficult to modify them for other display changes.
Innovation Solution
A universal switching mechanism that uses a sliding wheel set and control means to alternately couple with input wheel sets, allowing for a variety of applications without the need for expensive differential elements or relative positioning components like heart-pieces, enabling efficient space utilization and flexibility in display switching.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional switching mechanisms with differential elements and heart-pieces are used, then display switching functionality is achieved, but device complexity and space requirements increase significantly
Solution Approach 1:
The patent implements a universal switching mechanism where a single sliding wheel set can couple with multiple different input wheel sets (first input wheel set, second input wheel set, etc.) to control a common output wheel set. This multi-functional design allows the same switching mechanism to handle various display switching applications (time display, chronograph display, date display, etc.) without requiring application-specific differential elements or heart-pieces, thereby reducing overall device complexity while maintaining versatility.
Solution Approach 2:
The patent extracts and eliminates the complex differential elements and heart-pieces from traditional switching mechanisms. Instead of using these specialized components, the invention employs a simplified sliding wheel set that directly couples between input and output wheel sets. This extraction of unnecessary complex components reduces device complexity while preserving the essential display switching functionality.
2Adaptability or versatility
If traditional switching mechanisms with additional trains are used, then display switching functionality is achieved, but the space required inside the timepiece increases
Solution Approach 1:
The patent merges multiple functions into a single compact switching mechanism. The sliding wheel set serves as both the switching element and the coupling mechanism between input and output wheel sets. By combining the switching function and the power transmission function into a single integrated component, the patent eliminates the need for separate differential mechanisms and heart-pieces, thereby significantly reducing the volume required inside the timepiece while maintaining full display switching functionality.
3Ease of manufacture
If traditional switching mechanisms are designed for a single application, then mechanism design is simplified, but adaptability to other display changes becomes difficult
Solution Approach 1:
The patent designs a universal switching mechanism where the sliding wheel set can couple with multiple different input wheel sets (first input wheel set, second input wheel set, etc.) that may have different characteristics and drive different types of displays. This universal design allows the same switching mechanism to be applied to various display switching applications including time display, chronograph display, date display, and other complications, thereby achieving high adaptability without sacrificing manufacturing simplicity.
Data Source
AI summary
A horological mechanism (1000) with a first train (100) and a first output wheel set (101), a second train (200) and a second output wheel set (102), for alternately displaying on a display (800, 8, 28) a first and a second indication respectively specific to the first train and second train, by a switching and coupling mechanism (500), including two input wheel sets (1; 2) connected to the output wheel sets, which includes a sliding wheel set (5) capable of moving under constant strain between the two input wheel sets, and cooperating alternately and exclusively with either one, selected under the action of a command from a user, to establish a driving connection between the input wheel set engaged with the sliding wheel set at the given moment in time, and a display (800, 8, 28) to produce a switchable display.