Frame-Type Leg Lifting Pedal Linkage for Stable Horizontal Pedaling
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Solution Overview
Problem
Conventional frame-type leg lift machines suffer from pedals that tilt or wobble, leading to foot slippage and potential ankle sprains or falls, posing safety hazards during use.
Innovation Solution
The design incorporates two stable leg swing arm assemblies and a speed ratio adjustment mechanism, ensuring pedals remain horizontal and secure during use, with a magnetic resistance mechanism providing adjustable resistance for smooth pedaling.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the driving leg swing arm is mounted on the middle section of the pedal, then the machine structure is simplified, but the pedal becomes prone to tilting or wobbling causing foot slippage and safety hazards
Solution Approach 1:
The pedal is divided into two separate mounting sections: a front section for the auxiliary leg swing arm and a rear section for the main leg swing arm. This segmentation allows each swing arm to be mounted at optimal positions that maintain pedal stability while preserving the simplified structure benefit.
Solution Approach 2:
The mounting position parameter of the swing arms on the pedal is changed from the middle section to specific front and rear sections. This parameter change eliminates the tilting and wobble problems while maintaining structural simplicity.
2Adaptability or versatility
If the driving leg swing arm swings forward and backward, then leg lifting exercise is achieved, but the pedal tilts or wobbles causing foot slippage and potential injury
Solution Approach 1:
By segmenting the pedal into front and rear mounting sections and assigning different swing arms to each section, the invention enables the exercise function while preventing the harmful tilting and wobble effects that cause foot slippage.
Solution Approach 2:
The pedal design incorporates preliminary anti-action by positioning the swing arm mounting sections at front and rear locations that counterbalance each other during swing motion, preventing tilting and wobble before they can occur.
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
Ensures safe and stable pedaling with reduced risk of injury, allowing for varied training effects through adjustable resistance levels.
Implementation Method 1
a magnetic resistance mechanism, and a speed ratio adjustment mechanism. The magnetic resistance mechanism is assembled at the front section of the lower base frame
Data Source
AI summary
A frame-type leg lifting machine includes a main frame unit for mounting two driving leg swing arm assemblies, two pedals, a swinging assembly, a magnetic resistance mechanism, and a speed ratio adjustment mechanism. The speed ratio adjustment mechanism is linked between the swinging assembly and the magnetic resistance mechanism. Each of the driving leg swing arm assemblies includes a main leg swing arm and an auxiliary leg swing arm. Upper ends of the main leg swing arm and the auxiliary leg swing arm are pivotally mounted on the main frame unit to serve as pivoting fulcrums, so that the driving leg swing arm assemblies swing within the main frame unit. Each of the pedals has a front section and a rear section pivotally connected with lower ends of the auxiliary leg swing arm and the main leg swing arm.