Modular Leg Exercise Assembly With Adjustable Pivot Points
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Solution Overview
Problem
Existing leg exercise equipment is bulky, non-adjustable, and lacks portability, requiring fixed mounting points and causing resistance lag during exercises.
Innovation Solution
A modular, portable leg exercise assembly that allows adjustable pivot points, customizable weight placement, and compatibility with various seating, enabling separate and adaptable exercises.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If leg extension equipment is integrated into a fixed bench with proprietary mounting points, then structural stability is improved, but portability and adaptability to different user sizes deteriorate
Solution Approach 1:
The leg extension device is divided into separate modular components: an adjustable pad assembly, a weight stack, and a frame structure. This segmentation allows each component to be independently adjusted or repositioned to accommodate different user sizes while maintaining overall structural stability during exercise.
Solution Approach 2:
The device incorporates dynamic adjustment mechanisms including movable pads with multiple positioning holes, adjustable weight stack heights, and movable resistance arms. These dynamic elements enable the equipment to adapt to different user configurations while maintaining stability through proper mechanical engagement at selected positions.
2Volume of moving object
If weights are positioned close to extension pads to reduce space, then device compactness is improved, but resistance effectiveness deteriorates due to lag in resistance occurrence
Solution Approach 1:
The weight stack is positioned vertically above the extension pads rather than horizontally adjacent to them. This vertical arrangement in a different spatial dimension provides adequate resistance leverage and effectiveness while maintaining a compact horizontal footprint of the device.
Solution Approach 2:
The resistance mechanism is pre-configured with weights positioned on adjustable arms that can be set before exercise begins. This preliminary positioning ensures immediate resistance availability from the start of the exercise motion, eliminating resistance lag while maintaining compact dimensions through optimized arm length and weight placement.
3Device complexity
If a fixed pivot point is used in leg extension equipment, then device simplicity is improved, but adjustability for different user sizes deteriorates
Solution Approach 1:
The pivot point is made adjustable through a series of pre-drilled positioning holes along the vertical frame members. Users can reposition the pivot point to different heights and locations depending on their body dimensions, providing adaptability while maintaining relative simplicity through discrete positioning options rather than continuous adjustment mechanisms.
Data Source
AI summary
A leg exercise assembly includes a stand assembly, a weight carrying member, and a leg extension assembly. The leg exercise assembly is designed to facilitate a modular unit that is operable separate from other workout equipment. A user can use the leg exercise assembly by placing his weight on a base of the stand assembly. The weight carrying member includes a shaft and a weight post. The weight post is coupled to the shaft and is configured to carry weights. The shaft is pivotally coupled to the post. The leg extension assembly is pivotally coupled to the shaft of the weight carrying member and is releasable so as to be selectively oriented on the shaft to allow for the performance of different exercises.