Adjustable Leg Extension Machine for Variable Thigh Thickness
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Solution Overview
Problem
Conventional leg extension machines cannot adjust to fit the thickness of a user's thighs, causing inconvenience in use.
Innovation Solution
A leg extension machine designed with adjustable seating and exercise components to accommodate both leg length and thickness, including a frame, seating, and weight mechanisms that allow for customizable adjustments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the machine structure is made adjustable to fit different user body types, then adaptability is improved, but device complexity increases
Solution Approach 1:
The machine is divided into separate adjustable modules: the seating portion can be positioned at different locations along the frame, and the resting portion can be adjusted to different angles and positions. This segmentation allows independent adjustment of each component to accommodate different user body types without requiring complete structural redesign.
Solution Approach 2:
The machine incorporates dynamic adjustment mechanisms that allow the seating and resting portions to be repositioned during or between use sessions. The adjustable components enable the machine to adapt its configuration to match different user leg lengths and thigh thicknesses, transforming a static structure into a dynamically adaptable system.
2Ease of manufacture
If the machine is designed to be compact, then production costs are reduced, but adjustment range may be limited
Solution Approach 1:
The adjustable components are designed to nest within the compact frame structure when not in use. The seating and resting portions can be positioned closer together or folded into a more compact arrangement, allowing the machine to maintain a small footprint while still providing full adjustment range when needed.
Solution Approach 2:
The adjustment mechanisms utilize vertical and angular dimensions rather than only horizontal space expansion. By adjusting the angle of the resting portion and the vertical position of the seating, the machine achieves extended adaptability without significantly increasing its horizontal footprint, maintaining compactness while providing versatile adjustment options.
Data Source
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AI summary
A leg extension machine (1) according to an embodiment of the present disclosure may include a frame portion (10) supported by the bottom surface and standing upright; a seating portion (20) that is connected to the frame portion and provides a space for a user to sit and the standing angle and the height of which are adjustable; an exercise rotation portion (30) connected to the frame portion, disposed adjacent to the seating portion to provide a space for a seated user to hang his or her legs, and rotated by an external force applied by the user; a weight portion (40) supported by the frame portion and accommodating a plurality of weights; and a weight delivering portion (50) connected to the frame portion, connecting the exercise rotation portion and the weight portion, and linked to the rotation of the exercise rotation portion to raise and lower the weight of the weight portion, and the seating portion may include a hip seating portion (21) supporting the buttocks of a seated user; a back seating portion (23) supporting the back of a seated user; a seating angle adjuster (25) connected to the frame portion and the back seating portion to be used to adjust the angle of the back seating portion; and a plurality of grip portions (27) connected to both sides of the hip seating portion and arranged in parallel with the hip seating portion for a user to grip them.