Adjustable Arm Exercise Device for Joint-Safe Hip Adduction
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Solution Overview
Problem
Existing exercise devices for strengthening thigh and hip muscles often cause discomfort and injury due to fixed arm lengths, limited motion ranges, and inability to adapt to individual user needs, particularly for those with weak knee or ankle joints, and fail to provide comprehensive muscle resistance exercises.
Innovation Solution
The exercise device features a slide arm with adjustable guiding rails, shock absorbers, and gear mechanisms that allow flexible arm lengths and rotational movements, enabling users to perform exercises that mimic natural body movements, and includes a gear system for seamless transitions and resistance adjustment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed arm length is used in the exercise device, then the structure is simple, but the user experiences discomfort and the device cannot adapt to individual body dimensions
Solution Approach 1:
The arm length is made dynamically adjustable through a telescopic mechanism with multiple segments that can extend and retract. This allows the arm length to be changed according to different user body dimensions while maintaining exercise effectiveness, resolving the contradiction between adaptability and structural simplicity.
Solution Approach 2:
The arm is divided into multiple telescopic segments that can independently adjust their lengths. This segmentation enables flexible adaptation to various user requirements without requiring a completely different device structure, balancing adaptability with manageable complexity.
2Ease of operation
If a single pivot axis is used, then the device structure is simple, but the user must change seat position during exercise which causes inconvenience
Solution Approach 1:
The pivot mechanism is extended from a single axis to multiple axes arranged in different spatial dimensions. This multi-axis configuration allows the arm to move freely in multiple directions, eliminating the need for seat position changes while maintaining exercise effectiveness, thus improving ease of operation with acceptable structural complexity.
3Reliability
If the arm length is fixed, then the manufacturing is simple, but the knee joints become over-bent or over-extended causing side effects
Solution Approach 1:
The arm length parameter is made variable through the telescopic mechanism, allowing it to be adjusted according to user-specific requirements. This prevents knee joints from being over-bent or over-extended by matching the arm length to the user's body dimensions, thereby improving joint safety while accepting increased manufacturing complexity.
4Adaptability or versatility
If the motion range is fixed at 120° or more, then the exercise device is suitable for normal people, but it is not suitable for patients with spinal disc herniation or cruciate ligament rupture
Solution Approach 1:
The motion range is made dynamically adjustable through the multi-axis pivot mechanism, allowing it to be modified according to different user conditions. This enables the device to accommodate both normal people requiring 120° or more motion range and patients with injuries requiring limited motion ranges, achieving adaptability with acceptable operational complexity.
Data Source
AI summary
The present invention comprises a y-axis pivot axis which extends in a direction perpendicular to the ground; a resistance body driven by the power output from the y-axis pivot axis; a right arm and a left arm connected to the y-axis pivot axis; wherein when the left arm rotates clockwise, the y-axis pivot axis is driven clockwise, and the right arm idles, and when the right arm rotates clockwise, the y-axis pivot axis is driven clockwise, and the left arm idles, so that a user puts the user's legs on the leg pad and puts one end of the arms together to perform leg adduction and puts the one end of the arms apart to perform leg abduction.