Articulated Parallelogram Arm Support for Multi-Axis Motion Relief
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing ergonomic equipment fails to provide adequate support for the human arm, wrist, and hand during tasks requiring extensive horizontal and vertical motion, leading to repetitive stress injuries and fatigue, as it restricts motion or requires awkward rotations to accommodate varying task heights.
Innovation Solution
A lightweight, iso-elastic mechanical arm support system with a double-section parallelogram structure, featuring a hinge with vertical and horizontal pivots, and a contoured armrest with adjustable balance points, allowing for unimpeded multi-axis motion and reducing friction, enabling the arm to move freely while maintaining a comfortable, centered position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If fixed arm supports or supports with lateral motion are used, then forearm and wrist relief is provided, but vertical motion is restricted or awkward arm rotations are required
Solution Approach 1:
The support structure employs dynamic elements including a swing arm mechanism with pivot points that allow automatic adjustment to various vertical positions. The arm can swing between horizontal and vertical orientations, and the support surface can tilt to accommodate different working heights without requiring awkward rotations, thus resolving the contradiction between providing relief and enabling vertical motion adaptability
Solution Approach 2:
The support system is divided into multiple articulated segments including a base, swing arm, and support surface, each capable of independent motion. This segmentation allows the structure to adapt to different vertical positions while maintaining ergonomic support, solving the contradiction between fixed support benefits and vertical motion requirements
2Adaptability or versatility
If articulated support equipment is used to provide lateral freedom, then horizontal motion is improved, but vertical motion is restricted
Solution Approach 1:
The swing arm mechanism provides dynamic adaptability in both horizontal and vertical directions. The arm can swing laterally to provide horizontal freedom while simultaneously being capable of vertical adjustment through its pivot mechanism, eliminating the restriction of vertical motion that plagues static articulated supports
3Ease of operation
If spring-powered mechanical arms are used to counter arm weight, then fatigue is reduced, but device complexity increases
Solution Approach 1:
Spring mechanisms are integrated into the swing arm structure to provide upward counterbalancing force against the weight of the supported arm. The springs are positioned to work with the natural motion of the swing arm, providing fatigue reduction through a relatively simple mechanical addition rather than a complex active control system
Solution Approach 2:
The spring-powered mechanism automatically adjusts to support the arm weight without requiring external power sources or complex control systems. The mechanical springs self-regulate to provide appropriate support force, reducing fatigue while maintaining relatively simple device architecture
4Adaptability or versatility
If frictionless mechanical joints are used to facilitate arm rotation, then motion freedom is improved, but structural stability deteriorates
Solution Approach 1:
The pivot joints are designed with minimal friction to facilitate smooth arm rotation and positioning, while the overall swing arm structure provides dynamic stability through its articulated configuration. The system achieves both motion freedom and stability through its dynamic balanced design rather than relying solely on high-friction joints
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 support system effectively reduces arm fatigue and injury risk by providing unrestricted, three-dimensional motion, maintaining a neutral position, and distributing weight evenly, thus enhancing ergonomic comfort and reducing the effort required for prolonged tasks.
Implementation Method 1
spring-powered mechanical arm
Implementation Method 2
spring-powered, substantially frictionless mechanical arm
Implementation Method 3
substantially frictionless mechanical arm
Data Source
Figure 1
Figure 2
Figure 3
AI summary
An upper body appendage support apparatus having an articulating parallelogram support structure connected to an articulating upper body appendage support structure, the latter accommodating a user's forearm, wrist, and/or heel-of-hand. The apparatus analogously jointed to the human arm and moving synchronously therewith.