Split Armrest Structure for Controlled Chair Massage Access
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Solution Overview
Problem
Conventional chair-type massage machines lack a flexible and safe mechanism for opening and closing the armrest portions, which can lead to collisions with nearby objects or discomfort during use.
Innovation Solution
The chair-type massage machine incorporates an inner and outer divided armrest portion with a rotation shaft and restricting mechanism, allowing the armrests to open and close in a controlled manner, preventing excessive movement and providing a comfortable resting surface for the arms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the armrest portion is made fixed and solid, then structural stability is improved, but the range of motion and adaptability for different arm positions deteriorates
Solution Approach 1:
The armrest portion is divided into inner and outer divided portions that can move independently relative to each other. This segmentation allows each portion to be stable when closed while enabling relative motion when opened, resolving the contradiction between structural stability and range of motion.
Solution Approach 2:
The armrest portion transitions from a static fixed structure to a dynamic structure with controlled motion. The restricting portion limits the opening to a predetermined range, providing dynamic adaptability while maintaining stability within operational bounds.
2Adaptability or versatility
If the inner and outer divided portions are made openable and closable, then adaptability and comfort are improved, but the risk of excessive opening and potential harm increases
Solution Approach 1:
The restricting portion is designed to prevent excessive opening before harmful contact can occur. By limiting the opening range in advance, the system counteracts potential harmful effects before they manifest, resolving the contradiction between adaptability and safety.
3Reliability
If the armrest portion is designed with treatment portions for massage, then massage effectiveness is improved, but the device complexity increases
Solution Approach 1:
The inner and outer divided portions serve multiple functions: they provide structural support when closed, enable range of motion when opened, and incorporate treatment portions for massage. This multi-functionality reduces the need for separate components, resolving the contradiction between massage effectiveness and 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
This design ensures safe operation by preventing the armrests from colliding with furniture or people and allows for efficient storage and use, while maintaining a compact form factor by providing a dedicated space for the arms, enhancing user comfort and convenience.
Implementation Method 1
a rotation shaft provided at an front end side of the inner divided portion and the outer divided portion
Implementation Method 2
a restricting portion for restricting an operation range of at least one of either the inner divided portion or the outer divided portion
Data Source
AI summary
The armrest portion 1 of a chair-type massage machine includes: an inner divided portion 11 standing outside of a seat portion; an outer divided portion 12 standing outside of the inner divided portion 11; a treating portion 13 provided at at least one of an outer surface of the inner divided portion 11 or an inner surface of the outer divided portion 12; a rotation shaft 14 provided at an front end side of the inner divided portion 11 and the outer divided portion 12; and a restricting portion 15 for restricting an operation range of at least one of either the inner divided portion 11 or the outer divided portion 12, wherein the inner divided portion 11 and the outer divided portion 12 are openable and closable in right and left directions of a person to be treated by using the rotation shaft 14 as a fulcrum.