Heated Massage Ball Rotation Structure for Better Heat Conduction

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Solution Overview

Problem

Conventional massage balls with PTC heaters experience reduced thermal massage effect due to gaps causing friction noise and durability issues during rotation.

Innovation Solution

A massage ball design with a rotating member inserted into a heating member and an outer cover, allowing for conduction-based heat transfer and smooth rotation, featuring a heater cover and rotating pin configurations for improved heat transfer and durability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If the PTC heater is fixed in a non-rotating state to the center of the massage ball, then the heater can maintain stable position for power connection, but a fine gap is formed between the heater and the rotatably arranged massage ball reducing thermal massage effect

Engineering Contradiction:

Improvepower connection stabilityVSAvoidthermal massage effect

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

A rotating member is introduced as an intermediary component between the fixed heater and the rotatable outer cover. The rotating member rotates together with the outer cover while maintaining contact with the heater, serving as a mediator that enables both stable heater positioning and effective heat transfer during rotation.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The rotating member is rotatably inserted into the heater, creating a nested structure where the rotating member is contained within the heater assembly. This nested configuration allows the rotating member to rotate while maintaining thermal contact with the heater, solving the gap problem.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Temperature

If the PTC heater and the massage ball are disposed in contact with each other for heat transfer, then thermal conduction is improved, but noise due to friction is generated during rotation and durability deteriorates due to wear and tear

Engineering Contradiction:

Improveheat transfer performanceVSAvoiddurability

Core Design Contradiction:

TemperatureVSReliability

Solution Approach 1:

The rotating member acts as an intermediary between the heater and the outer cover, enabling heat transfer without direct frictional contact during rotation. The rotating member rotates smoothly within the heater, reducing friction and wear while maintaining thermal conduction.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The direct mechanical contact and friction-based heat transfer between the heater and outer cover is replaced by a rotation mechanism where the rotating member rotates within the heater. This substitution reduces frictional noise and wear while maintaining effective heat transfer.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Reliability

If a rotating member is rotatably inserted into the heating member, then smooth rotation without noise is enabled and durability is improved, but heat transfer performance must be maintained through proper contact design

Engineering Contradiction:

ImprovedurabilityVSAvoidheat transfer efficiency

Core Design Contradiction:

ReliabilityVSTemperature

Solution Approach 1:

The rotating member serves as a mediator that maintains thermal contact with the heater while enabling smooth rotation. The design ensures that the rotating member remains in contact with the heater during rotation, maintaining heat transfer efficiency while improving durability and reducing friction noise.

Inventive Principle:

Principle #24Intermediary (Mediator)

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

Enhances thermal massage effectiveness by ensuring smooth rotation without noise and preventing wear, thus maintaining durability.

Implementation Method 1

A positive temperature co-efficient (PTC) heater is provided in the center of the massage ball, which heats when current is applied

Methodology Applied

Scientific EffectJoule heating: Joule Heating

Implementation Method 2

the PTC heater and the massage ball may be disposed in contact with each other so that heat is transferred between the PTC heater and the massage ball in a conduction manner

Methodology Applied

Scientific EffectThermal conduction: Conduction (thermal)

Implementation Method 3

noise due to friction may be generated during the rotation of the massage balls, and durability may deteriorate as wear and tear occur between them

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentEP4699592A1Massage ball with improved heat transfer performance

Publication Date: 2026.02.25 CERAGEM CO LTD

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AI summary

The present invention relates to a massage ball, and more particularly, to a massage ball with improved heat transfer performance. The massage ball with improved heat transfer performance according to one aspect of the present invention includes a heating member, a rotating member rotatably disposed on an outer surface of the heating member, and an outer cover rotatably disposed on an outer surface of the rotating member.