Sliding Pinion Correction Mechanism for Timepiece Thickness
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Solution Overview
Problem
Existing timepieces face challenges in optimizing thickness and space occupation while effectively correcting indications from two display members driven by mobiles with different toothings, such as asymmetrical teeth, which are not coaxial and have varying shapes, heights, and inclinations.
Innovation Solution
Incorporating a sliding mobile with at least one asymmetrical tooth in the second transmission, allowing each flank of the tooth to adapt to the specific mobile it drives, and optionally including additional teeth to ensure tangential force transmission and prevent jamming or breakage, while maintaining a reduced thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a sliding mobile with asymmetrical teeth is used to correct two display members with different toothings, then the correction effectiveness is improved, but the device complexity increases
Solution Approach 1:
The sliding mobile incorporates asymmetrical teeth with different flank geometries (first flank and second flank) that are specifically adapted to engage with two different display members having different tooth profiles. This asymmetry enables the single sliding mobile to effectively correct both display members without requiring separate correction mechanisms for each, thus improving correction effectiveness while managing device complexity.
Solution Approach 2:
The sliding mobile is designed as a multi-functional component that can correct two different display members (such as an hour wheel and a date wheel) through its asymmetrical teeth. By making the sliding mobile universal in its correction capability, the patent avoids the need for separate correction mechanisms for each display member, thereby improving correction effectiveness while actually reducing overall device complexity.
2Adaptability or versatility
If multiple display members with different toothings are corrected, then the functionality is improved, but the thickness and space occupation increase
Solution Approach 1:
The patent combines the correction functionality for multiple display members into a single sliding mobile with asymmetrical teeth. This merging of correction functions into one component allows the timepiece to correct both display members without requiring separate correction mechanisms, thereby improving versatility while reducing the thickness and space occupation that would result from multiple separate correction systems.
Solution Approach 2:
The sliding mobile features local quality variations in its tooth geometry, with different flanks (first flank and second flank) having different shapes and orientations. Each flank is locally adapted to engage with a specific display member's tooth profile. This local differentiation enables the single sliding mobile to effectively correct multiple display members with different toothings without increasing overall device thickness.
Data Source
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AI summary
The invention relates to a timepiece comprising a sliding pinion correction mechanism (80) for indications supplied by a first display component and by a second display component, said correction mechanism comprising a sliding wheel (3) comprising two intermediate wheels (40, 30), the first intermediate wheel (40) being driven by the sliding pinion (80) so that the sliding wheel (3) is moved to a first position, in which the second intermediate wheel (30) drives the first display wheel (1) in a first direction of rotation, and to a second position, in which the second intermediate wheel (30) drives the second display wheel (2) by rotating in a second direction of rotation. The second intermediate wheel (30) comprises an asymmetric tooth (310), which enables effective correction of the indications provided by the two display components, the driving of which is provided by wheels comprising different teeth.