Massage Roller Assembly with Pneumatic Hardness Adjustment
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Solution Overview
Problem
Existing massage devices with rollers made of materials like nitrile butadiene rubber cannot adjust hardness based on user preference, as the rollers' shape and hardness are fixed during manufacturing.
Innovation Solution
A roller assembly with an air injection system that allows air to be injected into the roller, adjusting its hardness by expanding or contracting, and is rotatable to prevent hose twisting, using a central shaft, frames, and an air injection member with a nipple for air supply.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the roller is made of rubber-based material with fixed manufacturing, then the roller has stable structure and easy manufacture, but the hardness cannot be adjusted according to user preference
Solution Approach 1:
The patent applies pneumatic principles by injecting air into the roller to adjust its hardness. The air injection member includes an air injection chamber and air injection part that communicate with the interior of the roller, allowing air to be supplied and discharged to change the roller's internal pressure and consequently its hardness, enabling adaptability without complex mechanical adjustments
Solution Approach 2:
The patent changes the physical parameter of the roller by injecting air to alter its internal pressure. This parameter change directly affects the hardness of the roller, allowing it to be adjusted according to different massage needs while maintaining the same physical structure, thus resolving the contradiction between adaptability and structural complexity
2Reliability
If air injection member is fixedly coupled to rotate with central shaft, then the hose connection remains stable during rotation, but the manufacturing and assembly become more complex
Solution Approach 1:
The patent merges the air injection member with the central shaft by fixed coupling, causing them to rotate together as a unified assembly. This integration ensures that the hose connection point moves consistently with the roller rotation, preventing hose twisting and maintaining connection stability, though it does increase assembly complexity compared to a stationary air injection system
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
Enables adjustable hardness of the roller based on user massage strength, enhancing user comfort by varying the roller's firmness through air injection or discharge, while maintaining hose stability.
Implementation Method 1
air is injected into the roller through the air injection part
Implementation Method 2
the roller may expand or contract as air is injected into the roller or air is discharged from the roller
Data Source
AI summary
Provided is a roller assembly for massage, the roller assembly including a roller having one side surface coupled to a first frame, and another side surface coupled to a second frame, a central shaft penetrating a center of the roller, and an air injection member coupled to one side of the central shaft so as to be tightly attached to the first frame and having an air injection part disposed at an outer side thereof so that air is injected into the roller through the air injection part.