Eccentric Rotation Back Massager for Adaptive Body Contact
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Solution Overview
Problem
Conventional back massaging devices have limited effectiveness due to fixed pivot angles of swing arms, which fail to accommodate varying user body angles, resulting in uneven massaging and reduced comfort.
Innovation Solution
The massaging device employs eccentric rotation members with sliding contact between swing arms and these members, allowing for adjustable angles and even distribution of pressure, enabling the massaging members to touch the user's body evenly and provide a comfortable sensation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the pivot hole is directly mounted on the oblique drive portion with a fixed pivot angle, then the structure is simple, but the adaptability to different user body angles is poor
Solution Approach 1:
The patent transforms the fixed pivot connection into a dynamic adjustable connection by introducing an eccentric rotation member with an eccentric hole. The swing arm can rotate around the eccentric hole, allowing the pivot angle to change dynamically according to user body angles, thereby improving adaptability while maintaining structural simplicity
Solution Approach 2:
The patent changes the geometric parameter of the connection by using an eccentric hole instead of a centered pivot hole. The eccentric distance allows the swing arm to achieve a range of pivot angles, enabling adaptation to different user body angles without complicating the overall structure
2Reliability
If the swing arm uses a fixed pivot angle, then the manufacturing is simple, but the massaging effect is decreased when body angle does not fit
Solution Approach 1:
The swing arm connection is made dynamic through the eccentric rotation mechanism, allowing real-time adjustment of the pivot angle to match user body angles. This ensures reliable massaging effect across different usage scenarios without significantly complicating manufacturing
Solution Approach 2:
The eccentric rotation mechanism allows the swing arm to automatically adjust its pivot angle based on the user's body position. The system self-adjusts without external control, maintaining reliable massaging effect while keeping the manufacturing process simple
3Ease of operation
If the swing arm pivot angle is fixed, then the device structure is simple, but the comfort sensation is reduced due to uneven pressure distribution
Solution Approach 1:
The eccentric rotation member enables the swing arm to dynamically adjust its angle, allowing the massaging members to maintain even contact with the user's body. This dynamic adjustment ensures comfortable sensation through even pressure distribution without requiring complex control systems
Solution Approach 2:
By changing the pivot angle parameter through eccentric rotation, the system adapts to different user body angles and maintains even pressure distribution. This parameter adjustment improves user comfort while keeping the device structure relatively simple
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 allows for reciprocal movement of swing arms with eccentric rotation, adjusting angles to ensure even contact and pressure distribution, enhancing the massaging effect and user comfort by accommodating different body angles.
Implementation Method 1
the sliding face of the mounting hole of each of the two swing arms is in frictional sliding contact with the resting face of the respective eccentric rotation member
Implementation Method 2
two eccentric rotation members each having an inner portion provided with an eccentric hole
Data Source
AI summary
A back massaging device includes two eccentric rotation members each having an eccentric hole and a resting face, and two swing arms each provided with a mounting hole which has a sliding face. Thus, when each of the swing arms is pressed by the user's body, the sliding face of each of the swing arms is slidable on the resting face of the respective eccentric rotation member to freely adjust the angle of each of the swing arms, so that the first massaging member and the second massaging member of each of the swing arms touch the user's body evenly and exactly, and the pressing force applied by the first massaging member and the second massaging member are distributed evenly and smoothly on the user's body.