Micromechanical Actuation Flexible Guide Blades

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Solution Overview

Problem

Existing micromechanical actuation systems in watchmaking are not precise and sensitive enough, particularly for setting devices that require the actuator to assume a plurality of precise positions.

Innovation Solution

A high-precision actuation system is developed, featuring a micromechanical actuator with a spring part comprising a flexible guide with flexible blades, allowing for precise displacement of parts between multiple positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If traditional contact-based actuation systems are used, then the device complexity is reduced, but the positioning precision and sensitivity deteriorate

Engineering Contradiction:

Improvepositioning precisionVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent replaces traditional contact-based mechanical actuation with a magnetic field-based actuation system. Magnets are integrated into the actuator to enable contactless interaction with ferromagnetic elements, eliminating mechanical wear and improving positioning precision while maintaining manageable device complexity through the use of standard magnetic components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the actuation mechanism from mechanical contact to magnetic field interaction. By utilizing magnetic field strength as the actuation parameter instead of mechanical force, the system achieves higher positioning precision and sensitivity required for setting devices, while the magnetic components keep the overall device complexity within acceptable limits

Inventive Principle:

Principle #35Parameter changes

2Reliability

If springs are used to hold the movable part, then play between parts is avoided, but positioning precision for multiple positions deteriorates

Engineering Contradiction:

Improveplay avoidanceVSAvoidpositioning precision

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent substitutes spring-based mechanical retention with magnetic field-based positioning. Magnets provide continuous holding force without mechanical contact, eliminating play between parts while enabling precise positioning at multiple discrete locations. This magnetic retention system simultaneously achieves both reliability (no play) and positioning precision (multiple exact positions)

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The magnetic actuation system performs multiple functions: it actuates the movable part, holds it in position, and enables precise positioning at multiple locations, all through the same magnetic field mechanism. This multi-functionality replaces the separate roles previously filled by springs and contact-based positioning mechanisms

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Manufacturing precision

If conventional actuators are used, then the device simplicity is maintained, but the sensitivity and precision for setting devices deteriorate

Engineering Contradiction:

ImprovesensitivityVSAvoiddevice complexity

Core Design Contradiction:

Manufacturing precisionVSDevice complexity

Solution Approach 1:

The patent implements magnetic field-based actuation to replace conventional mechanical actuators. This substitution provides the sensitivity and precision needed for setting devices by enabling fine control through magnetic field strength adjustment, while the use of standard magnetic components and ferromagnetic elements keeps the added complexity manageable

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

The actuation system achieves highly accurate positioning of the actuator, enabling it to assume a large number of closely spaced positions while minimizing play-related issues, thus enhancing precision and sensitivity.

Implementation Method 1

the spring part comprises a flexible guide with flexible blades

Methodology Applied

Scientific EffectElasticity: Elasticity

Data Source

PatentUS20250036079A1Micromechanical actuation system with a flexible guide for watchmaking

Publication Date: 2025.01.30 ETA SA MFG HORLOGERE SUISSE

AI summary

An actuation system (20) for a horological movement, configured to displace, at least in part, a part between a plurality of positions, the actuation system (20) including a micromechanical actuator (30) intended to be engaged with said part, the micromechanical actuator (30) including a part (33) intended to be mounted such that it remains stationary, for example with respect to a plate of the horological movement, and a part (37) that is movable with respect to the stationary part (33), the actuator (30) including a spring part (35) connecting the movable part (37) to the stationary part (33), the spring part (35) carrying the movable part (37), the actuation system further including setting means cooperating with the actuator (30) so as to be able to displace the movable part (37) of the actuator (30) between a plurality of positions, the spring part (35) including a guide with flexible blades.