Portable Door-Mounted Exercise Device With Adjustable Elastic Resistance
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Solution Overview
Problem
Existing portable exercise devices are limited in the variety and number of exercises they can perform, are not suitable for users of varying sizes, fitness levels, or physical conditions, and are often bulky, expensive, or require electricity.
Innovation Solution
A lightweight, multifunctional exercise device designed to be secured to a door, made of durable and compact materials, allowing for a wide range of exercises and easy portability, with a retention mechanism for secure attachment and rapid removal from doors, and compatible with various accessories.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Weight of moving object
If exercise devices are made light-weight and portable, then they can be easily transported and set up in different locations, but they may not be sufficiently strong and durable to withstand repeated use by large or very fit persons
Solution Approach 1:
The exercise device employs dynamic tension through elastic bands that can be adjusted and replaced based on user strength requirements. The door anchor system provides a stable fixed point while the elastic bands create variable resistance that adapts to different user capabilities, allowing the same lightweight structure to serve both frail and very fit individuals.
Solution Approach 2:
The device changes the resistance parameter through interchangeable elastic bands of different tensions and through adjustable strap configurations. This allows the structural components to remain lightweight while the resistance parameters can be scaled to match user strength levels, resolving the contradiction between portability and durability for different user types.
2Adaptability or versatility
If exercise devices are designed for a wide variety of individuals of varying size, fitness and strength, then they become versatile and adaptable, but they generally are stationary and/or very expensive
Solution Approach 1:
The device achieves universality through a modular design where a single door anchor system supports multiple elastic bands of different resistances and various exercise accessories. The same basic structure accommodates users of all sizes and fitness levels by simply changing the elastic band configuration, eliminating the need for multiple specialized devices or expensive stationary equipment.
Solution Approach 2:
The exercise device is segmented into independent functional components: a reusable door anchor system, interchangeable elastic bands, and optional accessories. This segmentation allows users to build versatility through simple component combinations rather than requiring a complex integrated stationary device, reducing overall system complexity and cost.
3Ease of operation
If exercise devices are made simple and easy to use, then they are user-friendly and accessible to all individuals, but they may be limited in the variety and number of exercises that can be performed
Solution Approach 1:
The device provides preliminary action through pre-attached door anchors and pre-configured elastic bands that are ready for immediate use. Users can begin exercising right away with basic movements, and then progressively add complexity by attaching different accessories or adjusting band configurations, maintaining simplicity while enabling exercise variety.
Solution Approach 2:
The elastic bands serve as an intermediary element that connects the simple door anchor system to various exercise accessories. This intermediary allows easy attachment and detachment of different exercise components, providing versatility in exercise variety while maintaining the simplicity of the core anchor-and-band mechanism.
Data Source
AI summary
A portable exercise device includes an elongated base sheet and at least one attachment mechanism secured to the elongated base sheet at preselected locations on one side of said base sheet. The at least one attachment mechanism has at least one apparatus to receive an appendage of a user of the device and to provide a mechanism by which to secure a variety of exercise accessories to the base sheet. A retention mechanism for selectively removably connecting the device to a door sufficiently secures the device to the door that it will permit vigorous repeated use of the device without causing the device to inadvertently separate from the door during use and will also permit rapid, facile removal of the device from the door.