Synchronized Armrest Mechanism for Consistent Arm Massage Contact
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Solution Overview
Problem
In existing massage machines, the armrest portion moves independently of the backrest portion, leading to ineffective treatment of the arm when the backrest is reclined or raised, as the arm may move away from the treatment portion.
Innovation Solution
An armrest mechanism with a rotatable armrest support portion and armrest portion connected to the seating and backrest portions via parallel axes, allowing the armrest to move rearwardly and downwardly as the backrest is reclined, and forwardly and upwardly as it is raised, ensuring the arm remains within the treatment area.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the backrest portion is reclined or raised, then the backrest operation range is improved, but the armrest portion moves independently causing the arm to move away from the treatment portion
Solution Approach 1:
The armrest portion is merged with the backrest portion through a connecting structure that includes a slide portion and resting portion. When the backrest rotates, the armrest follows the movement through the slide mechanism, ensuring the arm remains positioned for effective treatment throughout the backrest operation range.
Solution Approach 2:
The armrest portion is designed to be dynamic rather than fixed, allowing it to move and adjust its position automatically as the backrest rotates. The slide portion enables the armrest to follow the backrest's motion path, adapting to different backrest angles while maintaining treatment effectiveness.
2Device complexity
If the armrest portion is fixed independently, then the structure is simple, but the arm cannot receive effective massage when backrest is reclined or raised
Solution Approach 1:
The armrest mechanism is segmented into distinct functional components: a slide portion that moves with the backrest, a resting portion that supports the arm, and a connecting portion that links them. This segmentation allows each component to perform its specific function while working together to maintain arm positioning during backrest movement.
Solution Approach 2:
The slide portion acts as an intermediary mechanism between the backrest portion and the resting portion. It translates the backrest's rotational motion into corresponding movement of the armrest, ensuring the arm remains in the correct position for treatment without requiring direct mechanical connection.
3Reliability
If the armrest portion is connected to the backrest portion, then the arm follows backrest movement, but the structure becomes more complex
Solution Approach 1:
The connecting structure serves multiple functions simultaneously: it connects the armrest to the backrest, enables the armrest to follow backrest movement, and maintains the arm in the correct position for treatment. By integrating these functions into a single mechanism, the design achieves reliable arm positioning without excessive complexity.
Data Source
AI summary
An armrest mechanism and a massage machine are provided, which make it easy to treat a fixed part of an arm of a treated person, even without restricting the operation of a backrest portion of the massage machine. The armrest mechanism of the present invention is arranged at a seating portion to which a backrest portion is connected in a manner rotatable about a first axis, and comprises an armrest support portion connected to the seating portion in a manner rotatable about a second axis parallel to the first axis; and an armrest portion connected to the backrest portion in a manner rotatable about a third axis parallel to the first axis and arranged on the armrest support portion in a manner slidable in a direction intersecting the first axis.