Nutating Massage Rollers for Stable 3D Percussive Forces
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Solution Overview
Problem
Existing massage devices struggle with maintaining stability and consistency in delivering percussive and rolling massage forces, leading to user fatigue and difficulty in targeting specific muscle areas due to reactionary bounce and the need for lubrication.
Innovation Solution
A handheld massage device with four massage rollers mounted on nutating axles, providing synchronized 3-dimensional massage vectors along orthogonal axes, combining percussive and rolling massage actions to simulate therapist techniques effectively.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If a reciprocating plunger mechanism is used to produce percussive massage motion, then percussive massage force is delivered to the target muscle, but the device produces reactionary bounce that makes it difficult to hold steady and causes user fatigue
Solution Approach 1:
The patent employs a counterweight mechanism that offsets the reactionary bounce generated by the reciprocating plunger. The counterweight is positioned and sized to create an opposing force that balances the reactive forces during percussive motion, thereby stabilizing the device and reducing user fatigue while maintaining effective massage force delivery.
Solution Approach 2:
The patent introduces damping elements specifically at the locations where reactionary forces are generated. These localized damping components absorb and dissipate the reactive bounce energies, providing stability where needed without affecting the overall percussive force delivery to the massage target.
2Ease of operation
If a roller massage device is used to traverse along massage-receiving surfaces, then rolling massage and stretching is provided, but the device requires lubrication to operate effectively
Solution Approach 1:
The roller massage device is designed with self-lubricating materials or surface treatments that reduce friction without requiring external lubrication. The rollers incorporate materials with inherent low-friction properties or self-conditioning surfaces that maintain smooth operation during traversing motions, eliminating the need for additional lubrication substances.
3Productivity
If multiple rollers are used to provide comprehensive massage coverage, then massage effectiveness is improved, but device complexity and weight increase
Solution Approach 1:
The patent combines multiple roller functions into integrated assemblies where rollers are mounted on common axes or shared support structures. This merging approach allows multiple massage points to be delivered simultaneously while reducing the number of independent mounting mechanisms and support components, thereby maintaining massage coverage efficiency while simplifying the overall device structure.
Solution Approach 2:
The roller assemblies are designed to perform multiple functions simultaneously - providing rolling massage, stretching through traversing motion, and adapting to different body contours. This multi-functionality allows a single roller assembly configuration to deliver comprehensive massage coverage without requiring separate dedicated components for each function, reducing overall device complexity.
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 device achieves stable, efficient, and fatigue-free massage by inducing bidirectional forces along multiple axes, effectively treating muscle damage and cellulite without the need for lubrication, while maintaining focus on target areas.
Implementation Method 1
the motorized device causes the head to rapidly oscillate along axis 904 with various forces and frequencies
Implementation Method 2
the piston 906 reciprocates in the direction of the axis of the arrow 904 within the housing 902 to create a reciprocating plunging movement of the head 905
Data Source
AI summary
A handheld, motorized massage device includes four rollers having stimulating projections which each rotate upon motor-driven nutating axles to produce massage contact forces that pulsate bidirectionally along three orthogonal axes. Simultaneously, opposing pairs of nutating rollers counter rotate to produce alternating stretching and compression forces along the massage-receiving fascia surface. The nutating device combines the deep fascia benefits of percussive massage devices with the superficial fascia stretching benefits of rolling massage devices.