Concave Underarm Pillow for Shoulder Joint Stabilization
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Solution Overview
Problem
Bipedal posture leads to mechanical issues in the human skeleton, particularly affecting the shoulder joint, where the rotator cuff muscles can become strained or injured, causing pain and instability due to improper alignment and support of the humeral head in the glenoid socket.
Innovation Solution
A concave underarm pillow made of uniformly shaped resilient foam, compressed non-uniformly and enclosed in a fabric container, provides directed forces to support the axilla, assisting the rotator cuff muscles by maintaining a healthy joint position and reducing strain on the shoulder joint.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If rolled or folded towels are used to support the upper arm, then the arm position is improved to reduce pain and stabilize the glenohumeral joint, but the support is insufficient to provide appropriately directed forces on the axilla
Solution Approach 1:
The pillow incorporates a specifically designed concave surface with varying compression zones that apply localized forces to different regions of the axilla. This non-uniform compression creates appropriately directed forces that guide the humeral head into proper alignment, addressing the limitation of uniform towels by providing differentiated support in different areas.
Solution Approach 2:
The pillow utilizes material compression parameters to transform the foam structure into a configuration that provides both support and directional force. By controlling the degree and distribution of compression in the foam material, the pillow achieves optimal force vectors for joint stabilization that rolled towels cannot provide.
2Ease of manufacture
If a uniformly shaped block of foam is used, then manufacturing is simplified, but the foam must be compressed non-uniformly to provide appropriately directed forces
Solution Approach 1:
The foam block is compressed into distinct zones with different compression levels, creating segments of varying density and firmness. This segmentation allows the single uniform foam block to provide differentiated force distribution, achieving precision in force control while maintaining manufacturing simplicity.
Solution Approach 2:
The non-uniform compression creates an asymmetric internal structure within the foam block, with varying density gradients that correspond to the anatomical requirements of the axilla. This asymmetric compression pattern enables the symmetrically manufactured foam block to provide directionally appropriate forces.
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 pillow offers immediate pain relief and aids in the recovery of tired or damaged muscles by stabilizing the humeral head in the glenoid socket, promoting proper alignment and reducing shoulder instability.
Implementation Method 1
The pillow is constructed of an appropriately shaped block of uniform resilient foam material which is compressed non uniformly to provide appropriately directed forces on the axilla
Implementation Method 2
uniform resilient foam material which is compressed non uniformly
Data Source
AI summary
An underarm pillow for the relief of human shoulder discomfort is formed from a block of compressible visco-elastic foam shaped to fit under the armpit with a concave upward surface which both supports the weight of the arm and also supplies horizontal forces on the ball of the humerus to locate the ball properly in the socket of the shoulder.