Rotatable Arm Massage Unit With Linear-to-Rotary Motion Conversion

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Solution Overview

Problem

Existing massage devices lack the ability to provide optimized massage functions for individual users, particularly in terms of rotational operation simplicity and space efficiency for arm massage units.

Innovation Solution

A massage device featuring a rotatable arm massage unit with a rotation module that includes an arm rotation actuator with an expandable rod and a motion conversion member, which converts linear motion into rotational motion for smooth and stable arm massage unit rotation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If the arm massage unit is rotated using a simple linear or rotational driving device, then the configuration is simple, but the rotation is not smooth and stable, and noise and vibration increase

Engineering Contradiction:

Improvesmoothness and stability of arm massage unit rotationVSAvoidcomplexity of rotation module

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

A motion conversion member is introduced as an intermediary component between the arm rotation actuator and the arm massage unit. This motion conversion member transforms the linear motion of the actuator into rotational motion of the arm massage unit, achieving smooth and stable rotation while maintaining a relatively simple overall configuration.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Object-affected harmful factors

If the arm rotation actuator operates with lateral vibration, then the actuator can be compact, but noise and vibration increase and interference with other components occurs

Engineering Contradiction:

Improvenoise and vibration during actuator operationVSAvoidsize of arm rotation actuator

Core Design Contradiction:

Object-affected harmful factorsVSWeight of moving object

Solution Approach 1:

The arm rotation actuator is designed to operate in a fixed state where the expandable rod expands or contracts along a predetermined path without lateral vibration. By maintaining this equipotential operational state, the actuator minimizes noise and vibration while preventing interference with other components, achieving a balance between compact size and harmful factor reduction.

Inventive Principle:

Principle #12Equipotentiality

3Adaptability or versatility

If the arm massage unit rotates vertically, then various massage and stretching functions are provided, but the configuration for rotational operation becomes complex

Engineering Contradiction:

Improvemassage and stretching functions for arms and shouldersVSAvoidconfiguration for rotational operation

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The motion conversion member serves as a mediator that enables vertical rotation of the arm massage unit to provide various massage and stretching functions. By converting linear actuator motion into rotational motion, it achieves functional versatility without requiring a complex rotational driving mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

4Reliability

If the arm rotation actuator is fixed without lateral vibration, then noise and vibration are reduced and durability is improved, but the installation space must be optimized

Engineering Contradiction:

Improvedurability of arm rotation actuatorVSAvoidinstallation space of arm rotation actuator

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The arm rotation actuator is designed to operate in a fixed state with the expandable rod moving along a predetermined path without lateral vibration. This equipotential operation mode improves reliability and durability by eliminating harmful vibrations, while the compact design optimizes installation space within the massage device.

Inventive Principle:

Principle #12Equipotentiality

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 provides various massage and stretching functions for users' arms and shoulders, enhances user convenience by minimizing space and noise, and improves durability by reducing lateral vibration and interference.

Implementation Method 1

a motion conversion member which is connected to the other end of the arm rotation actuator and the arm massage unit, and converts a linear motion of the expandable rod into a rotational motion of the arm massage unit

Methodology Applied

Scientific EffectMotion conversion:

Data Source

PatentUS20250032347A1Massage device having rotatable arm massage unit

Publication Date: 2025.01.30 BODYFRIEND CO LTD

AI summary

Provided is a massage device capable of providing various functions to a user by including a rotatable arm massage unit. The massage device includes: a body massage unit including a main frame forming the skeleton of the massage device, and massaging a user's body; arm massage units respectively arranged on both sides of the body massage unit, accommodating both arms of the user, and configured on the body massage unit to rotate around a rotational shaft; and a rotation module rotating the arm massage units, wherein the rotation module comprises: an arm rotation actuator which has an end connected to the main frame and includes an expandable rod expanding or contracting in one direction; and a motion conversion member which is connected to the other end of the arm rotation actuator and the arm massage unit, and converts a linear motion of the expandable rod into a rotational motion of the arm massage unit.