Waist Muscle Assistance Apparatus with Rotating Frames
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Solution Overview
Problem
Existing apparatuses for assisting waist muscle strength often hinder users from easily sitting in chairs with backrests due to protruding structures, and they fail to generate torque when structures rotate in opposite directions.
Innovation Solution
An apparatus with an upper and lower frame, a wire, and a force generating unit that includes movable members and springs, allowing the lower frame to rotate relative to the upper frame, generating torque when the user bends their waist, and allowing the user to sit comfortably with the apparatus on.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Force
If main components are positioned to apply torque to the user's back, then torque generation for waist muscle assistance is improved, but the user cannot easily sit in a chair having a backrest
Solution Approach 1:
The apparatus is divided into separate functional modules: torque-generating structures (first and second structures) that can be independently positioned, and a support structure (backrest interface) that provides sitting comfort. This segmentation allows the torque-generating components to be configured for effective waist assistance while the support structure ensures ease of sitting in chairs with backrests.
2Force
If the two structures rotate in the same direction, then torque is generated for assisting muscular strength, but the apparatus does not generate torque when the two structures rotate in the opposite directions
Solution Approach 1:
The apparatus employs dynamic control mechanisms that detect the rotation directions of the first and second structures and selectively engage or disengage torque generation based on whether the structures rotate in the same direction (assisting motion) or opposite directions (non-assisting motion). This dynamic adaptation allows the apparatus to provide torque assistance only when needed while remaining adaptable to various user movements including walking.
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
Enables users to sit in chairs with backrests while wearing the apparatus, providing effective torque assistance for waist muscles during bending and minimizing load on the waist, while not generating force during opposite rotations like walking.
Implementation Method 1
a main spring part having one side fixed to the first movable member and the other side fixed to the second movable member
Data Source
AI summary
Disclosed is an apparatus for assisting muscular strength, the apparatus including: an upper frame configured to be fixed to a user's upper body; a lower frame disposed below the upper frame and configured to be fixed to the user's lower body and rotatable relative to the upper frame; a wire disposed across the upper frame and the lower frame; and a force generating unit coupled to one side of the upper frame, in which when the lower frame rotates in a first direction D1 relative to the upper frame, the force generating unit generates a force applied in a second direction D2 opposite to the first direction D1, in which the force generating unit includes: a first movable member; a second movable member; and a main spring part.