Tessellated Massage Roller Protrusion Design
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Solution Overview
Problem
Existing massage rollers are unable to effectively emulate cross-friction massage techniques, which require tangential movement of superficial soft tissue layers to create increased shear forces in underlying tissues, due to their design that primarily focuses on compressive forces and lacks sufficient grip through clothing.
Innovation Solution
A massage roller with a hollow cylindrical body and protrusions arranged in a polygonal tessellation, featuring a concave cap and filleted peripheral edges, optimized for grip and directional independence, allowing for effective tangential force application on the skin through light clothing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If existing massage rollers use protrusions designed for compressive force delivery, then compressive force application is improved, but tangential force application capability deteriorates
Solution Approach 1:
The patent applies local quality by giving different parts of the massage roller different functions: the protrusions are designed with specific geometric features (polygonal cross-section, filleted edges, concave caps) that enable them to perform both compressive force delivery and tangential force application. The protrusions are arranged in a tessellated pattern where each protrusion can independently grip and move tissue in multiple directions, allowing the same structure to serve multiple massage functions rather than requiring separate rollers for different techniques.
2Device complexity
If existing massage rollers rely on friction between protrusions and clothing, then device simplicity is maintained, but grip through clothing deteriorates
Solution Approach 1:
The patent applies parameter changes by modifying the geometric parameters of the protrusions to enhance grip. The protrusions feature polygonal cross-sections with multiple flat surfaces, filleted peripheral edges that conform to tissue contours, and concave caps that increase surface area and mechanical interlocking. These geometric parameter changes enable the protrusions to grip effectively through light clothing layers without adding complex mechanisms, maintaining structural simplicity while dramatically improving grip reliability.
3Force
If existing massage rollers use high protrusion height for tissue penetration, then compressive force concentration is improved, but directional independence deteriorates
Solution Approach 1:
The patent applies asymmetry through the polygonal cross-section design of the protrusions. Each protrusion has a non-circular cross-section with multiple flat surfaces and filleted edges, creating asymmetric contact points with the tissue. This asymmetric geometry allows the protrusions to penetrate tissue effectively while maintaining the ability to move in multiple directions without becoming stuck, as the different facial surfaces can sequentially contact and roll over tissue in various directions.
4Ease of operation
If existing massage rollers have smooth surfaces for compressive force, then ease of rolling is improved, but shear force generation deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the roller surface into multiple discrete protrusions arranged in a tessellated pattern, rather than using a continuous smooth surface. Each protrusion acts as an independent element that can penetrate and grip tissue separately. This segmented structure maintains ease of rolling as the protrusions can roll over each other and the tissue, while simultaneously generating shear forces through the individual gripping action of each protrusion on the tissue surface.
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 optimized design enables consistent and effective application of tangential forces to superficial soft tissue layers, creating increased shear forces in underlying tissues, enhancing massage efficacy.
Implementation Method 1
If the surface of the roller contains protrusions, those protrusions further concentrate the compressive force and cause localized displacement of soft tissue beneath the points of contact
Implementation Method 2
the friction between skin and clothing is usually low, there would be little to no tangential movement of soft tissue
Data Source
AI summary
A massage roller may include a hollow cylindrical body with a cylindrical core and a plurality of massage protrusions each extending outwardly from the cylindrical body. Each massage protrusion may be substantially centered within a different polygonal region of a polygonal tessellation of the surface of the cylindrical body. The massage protrusions each may have a base, a filleted peripheral edge extending around the base, a concave cap opposite the base, and a plurality of walls equal in number to the edges of the polygonal region in which the protrusion is substantially centered. Each massage protrusion may also include an axial cross-section which is substantially polygonal, and has the same number of edges as and is substantially aligned with the polygonal region in which the protrusion is substantially centered.