Dynamic Balance Mechanism for Mobile Medical Device Stability

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Solution Overview

Problem

Mobile medical devices face instability due to changes in the center of gravity caused by instantaneous pulling forces or uneven road surfaces during transportation, leading to potential tipping or dumping.

Innovation Solution

A balance mechanism comprising a working device, a connecting arm assembly with variable length, a torque-balancing assembly, a weighting member, and a connecting member, where the distance between the working device and pivot adjusts to maintain dynamic balance by varying the distance between the weighting member and pivot, ensuring the second torque is greater than or equal to the first torque to prevent shifting of the center of gravity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the working device is positioned at one side of the supporting mechanism, then the device can be compact and easier to maneuver, but the center of gravity shifts causing instability and potential tipping during transportation

Engineering Contradiction:

ImprovemaneuverabilityVSAvoidstability

Core Design Contradiction:

Ease of operationVSStability of the object's composition

Solution Approach 1:

The patent applies the counterweight principle by positioning the weighting member (counterweight) on the opposite side of the working device relative to the pivot point of the supporting mechanism. This creates opposing torques that balance the center of gravity, preventing the device from tipping during transportation while maintaining the compact one-sided configuration for ease of operation.

Inventive Principle:

Principle #8Anti-weight (Counterweight)

2Adaptability or versatility

If the distance between the working device and pivot is increased to improve working range, then the working range is expanded, but the torque imbalance increases causing greater instability

Engineering Contradiction:

Improveworking rangeVSAvoidbalance

Core Design Contradiction:

Adaptability or versatilityVSStability of the object's composition

Solution Approach 1:

The patent implements dynamics by making the distance between the weighting member and the pivot point adjustable. As the working device's distance from the pivot changes to expand working range, the weighting member's distance is correspondingly adjusted to maintain torque balance, allowing the system to adapt to different working conditions while preserving stability.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent applies parameter changes by varying the positional parameters (distances) of both the working device and the weighting member relative to the pivot point. By dynamically adjusting these parameters, the system expands its working range while maintaining the torque balance condition to prevent instability.

Inventive Principle:

Principle #35Parameter changes

3Device complexity

If a fixed weighting member position is used to simplify the structure, then the structure is simpler, but the device cannot adapt to changing working conditions and may tip during movement

Engineering Contradiction:

ImprovestructureVSAvoidsafety

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent transitions from a fixed to a dynamic configuration by enabling adjustment of the weighting member's position. This allows the system to adapt to changing working conditions and transportation scenarios, maintaining reliability and safety without excessive structural complexity.

Inventive Principle:

Principle #15Dynamics

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 balance mechanism effectively maintains stability and prevents tipping during transportation by dynamically adjusting torques, ensuring the mobile medical device remains balanced even on uneven surfaces or under sudden forces, thus enhancing safety and compliance with safety regulations.

Implementation Method 1

The weight of the working device and the distance between the working device and the pivot generate a first torque. The weight of the weighting member and the distance between the weighting member and the pivot generate a second torque.

Methodology Applied

Scientific EffectTorque: Torque

Implementation Method 2

Methodology Applied

Scientific EffectGravitation: Gravitation

Data Source

PatentUS11266482B2Balance mechanism and mobile medical device having the same

Publication Date: 2022.03.08 WISTRON CORP

AI summary

A balance mechanism comprises a working device, a connecting arm assembly having a variable length, a torque-balancing assembly, a weighting member, and a connecting member. The connecting arm assembly couples to the working device. The connecting arm assembly is pivoted to the torque-balancing assembly by a pivot. The weighting member couples to the torque-balancing assembly. The connecting member connects the connecting arm assembly and the torque-balancing assembly. As the distance between the working device and the pivot changes, the distance between the weighting member and the pivot changes accordingly, so that a dynamic balance can be achieved.