Ring-Shaped Corrector Transmission for Timepiece Space Optimization
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Solution Overview
Problem
Existing timepiece correction devices are not suited for ring-shaped display members, particularly limiting space and making integration difficult due to a large rocker-corrector mobile assembly that occupies space near the winding stem, especially when chronograph counters are close by.
Innovation Solution
A correction device with a ring-shaped corrector transmission that frees up space in its center, allowing the rocker-corrector mobile assembly to be moved to sectors like 9 o'clock, 6 o'clock, or 12 o'clock, away from the winding stem, utilizing a ring with internal toothing and guided by a rib, which accommodates counter shafts and reduces the assembly's size.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the correction device uses a traditional transmission structure near the winding stem, then the correction function is achieved, but the assembly occupies large space making integration difficult when chronograph counters are close to the winding stem
Solution Approach 1:
The corrector transmission is designed as a ring-shaped structure that surrounds and accommodates counter shafts within its internal space. This nesting arrangement allows the correction device to enclose other components rather than occupying separate space, effectively reducing the overall footprint on the plate while maintaining the correction function.
Solution Approach 2:
The correction device transitions from a planar layout near the winding stem to a vertical/dimensional arrangement where the ring-shaped corrector transmission can surround counter shafts. This dimensional change allows the assembly to be positioned in sectors like 9 o'clock, 6 o'clock, or 12 o'clock, away from the winding stem area, effectively utilizing three-dimensional space rather than just the two-dimensional plate surface.
2Area of stationary object
If the corrector transmission is designed as a ring with internal toothing, then space is freed up in the center to accommodate counter shafts, but the structure becomes more complex
Solution Approach 1:
The ring-shaped corrector transmission serves multiple functions simultaneously: it transmits correction motion through its internal toothing, surrounds and protects counter shafts within its internal space, and defines the operational sector for the rocker-corrector mobile assembly. This multi-functionality consolidates several components into one, reducing overall device complexity despite the ring structure.
Solution Approach 2:
The corrector transmission is segmented into functional zones: the internal toothing for motion transmission, the internal space for accommodating counter shafts, and the outer perimeter for guiding the rocker-corrector mobile assembly. This segmentation allows each part of the ring structure to serve its specific purpose efficiently, simplifying the overall design by clearly defining functional boundaries.
3Area of stationary object
If the rocker-corrector mobile assembly is moved to sectors away from the winding stem, then space near the winding stem is freed up, but the transmission path becomes longer
Solution Approach 1:
The corrector transmission ring is designed to directly engage with the pinion on the winding stem while simultaneously guiding the rocker-corrector mobile assembly in its sector. This merging of functions eliminates the need for separate intermediate transmission elements, keeping the transmission path compact despite the spatial separation between the winding stem and the corrector assembly.
Data Source
Figure 1
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AI summary
The device (14) has a winding stem (50) arranged to occupy a time indication correction position, and a sliding pinion rotatably coupled to the stem. A correction motion transfer (58) is kinematically connected to the pinion when the stem occupies the position. A correction wheel assembly (68) is mounted on a lever (70), engaged with date indicator and actuated by the transfer. The transfer has a ring (60) with internal and external circumferences, where the external circumference of the ring is provided with inner teeth (62) indirectly meshed with the assembly.