Electromagnetic Driving Mechanism With Fewer Resilient Elements

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Solution Overview

Problem

Conventional driving mechanisms using shape memory alloy (SMA) require multiple preloaded resilient elements to indicate moving directions, which occupy significant space and are inefficient in ensuring directional movement, necessitating a reduction in the number of resilient elements while maintaining directional capability.

Innovation Solution

A driving mechanism incorporating a first and second movable portion, driven by respective assemblies including a coil and magnetic elements, with resilient elements connecting the movable portions to facilitate directional movement, allowing for efficient directional change and reduced component count.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If multiple preloaded resilient elements are disposed to indicate moving directions, then the moving direction of the movable portion can be ensured, but the space occupied by the mechanism increases significantly

Engineering Contradiction:

Improvedirectional movement assuranceVSAvoidspace occupation

Core Design Contradiction:

ReliabilityVSArea of stationary object

Solution Approach 1:

The patent replaces the conventional mechanical resilient element system with an electromagnetic driving system comprising a coil and magnetic element. This substitution eliminates the need for multiple preloaded resilient elements to indicate moving directions, as the electromagnetic system can generate force in multiple directions through controlled current flow, thereby reducing space occupation while maintaining directional movement assurance

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The electromagnetic driving assembly serves multiple functions: it generates driving force, indicates moving direction, and controls the movable portion's position. By integrating these functions into a single system rather than using separate resilient elements for each function, the patent reduces the overall number of components and space required

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Stability of the object's composition

If a pair of resilient elements are required for one moving direction to balance the mechanism, then the mechanism balance is achieved, but the number of resilient elements and space required increase

Engineering Contradiction:

Improvemechanism balanceVSAvoidnumber of resilient elements

Core Design Contradiction:

Stability of the object's compositionVSDevice complexity

Solution Approach 1:

The patent merges the functions of multiple resilient elements into a single electromagnetic driving assembly. The coil and magnetic element work together as an integrated system that can provide balanced driving forces in opposite directions through controlled current reversal, eliminating the need for separate pairs of resilient elements and reducing overall device complexity

Inventive Principle:

Principle #5Merging (Combining)

3Device complexity

If conventional driving mechanisms use only shape memory alloy compression, then the structure is simplified, but the moving direction cannot be efficiently ensured

Engineering Contradiction:

Improvestructure simplicityVSAvoidmoving direction control

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent enhances the simple shape memory alloy compression mechanism by introducing an electromagnetic driving system. The coil and magnetic element provide active directional control through electromagnetic forces, while the shape memory alloy provides the compression force. This hybrid approach maintains structural simplicity while efficiently ensuring moving direction control

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 mechanism achieves efficient directional movement with reduced resilient elements, enhancing space utilization and driving efficiency, suitable for heavier loads and miniaturization.

Implementation Method 1

The first driving assembly includes a coil and a magnetic element corresponding to the coil

Methodology Applied

Scientific EffectElectromagnetic force: Lorentz Force

Implementation Method 2

the compression of the shape memory alloy brings the resilient elements connected to the movable portion to deform

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Data Source

PatentUS12000385B2Driving mechanism

Publication Date: 2024.06.04 ACTUTEK CORP

AI summary

A driving mechanism is provided in the present disclosure, including a fixed portion, a first movable portion, and a first driving assembly. The first movable portion moves relative to the fixed portion in a first direction. The first driving assembly drives the first movable portion to move relative to the fixed portion in the first direction. The first driving assembly includes a coil and a magnetic element corresponding to the coil.