Telescopic Hip Exercise Mechanism for Natural Joint Motion
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Solution Overview
Problem
Existing exercise devices for strengthening thigh and hip muscles, such as fixed-type bicycles, restrict the motion range of the hip joint, cause discomfort due to fixed arm lengths, and result in over-bending or over-extending of knees, and have issues with pedal rotation and axis conversion wear.
Innovation Solution
The exercise device incorporates a shock absorber to adjust arm length, uses a pipe and bar for linear movement, separates the axis into left and right sides with gears, and employs bevel or spiral gears for smooth rotation and resistance, allowing for flexible arm extension and automatic restoration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a fixed-type bicycle with a fixed pivot axis is used, then the device structure is simple, but the motion range of the hip joint is restricted and the exercise effect on hip muscles is insufficient
Solution Approach 1:
The patent applies the dynamics principle by replacing the fixed pivot axis with a movable pivot axis that can move along a guide rail. This allows the pivot axis position to be dynamically adjusted during exercise, enabling the hip joint to achieve a full range of motion (approximately 120 degrees) while maintaining structural simplicity through the use of a guide rail and movable axis mechanism
2Device complexity
If a single arm with a fixed pivot part is provided, then the device structure is simple, but the user must change seat position during exercise which causes inconvenience
Solution Approach 1:
The patent applies segmentation by dividing the single arm structure into two separate arms, each with its own pivot part. This segmentation allows each arm to independently support and rotate the user's legs, eliminating the need for seat position changes during exercise and providing continuous exercise capability without structural complexity
3Device complexity
If the arm length is fixed, then the device structure is simple, but the arm length changes according to rotation angle causing discomfort and knee over-bending
Solution Approach 1:
The patent applies dynamics by replacing the fixed arm with a telescopic arm that can dynamically adjust its length. The telescopic mechanism includes nested arm segments that extend and retract based on the rotation angle, maintaining optimal arm length throughout the exercise range and preventing knee over-bending while keeping the overall structure relatively simple
4Device complexity
If the pedal rotates by using a bar as an axis during linear movement, then the device structure is simple, but the pedal rotation causes discomfort
Solution Approach 1:
The patent applies the extraction principle by removing the bar axis from the pedal rotation mechanism. Instead of rotating around a bar, the pedal is directly connected to the telescopic arm end, eliminating unnecessary rotation and providing smooth linear movement that enhances comfort while maintaining structural simplicity
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
The device effectively strengthens thigh and hip muscles without joint strain, increases exercise range, and reduces wear on components, enabling users to perform natural movements with enhanced muscle resistance and gear integration.
Implementation Method 1
providing a shock absorber to the arm having one end connected to a pivot axis and allows a length of the arm to be extended and then restored through the shock absorber
Implementation Method 2
a gear device that separates the axis into left and right sides and uses bevel or spiral gears to enable 360-degree rotation
Data Source
AI summary
The present invention relates to an apparatus for strengthening thigh and hip muscles. The apparatus according to the present invention enables a user to perform a movement in which a portion of the body connected to an arm rotates by using hip joint of the user as a pivot axis and simultaneously enables the user to perform a movement of compressing legs by providing the arm having one end connected to the pivot axis wherein the pivot axis is located close to a seat and allows a length of the arm to be extended and then restored according to a rotation angle.