Recumbent Exercise Bicycle Attachment for Upright Bikes
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Solution Overview
Problem
Existing exercise bicycles often lack versatility in seating positions, making them unsuitable for users who cannot ride upright and fail to provide the physiological diversification needed for effective fitness and rehabilitation, while also being limited in accommodating users with disabilities.
Innovation Solution
The Recumbent Exercise Bicycle Attachment (REBA) integrates with existing exercise bicycles to create a dual-purpose workstation with adjustable flywheel resistance and seating, allowing users to switch between upright and recumbent positions, accommodating users of varying heights and abilities without requiring a power source or electronics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If exercise bicycles are designed for upright cycling position only, then the device complexity remains simple, but the adaptability is limited and cannot accommodate users who cannot ride upright
Solution Approach 1:
The REBA attachment enables a single exercise bicycle to serve multiple functions by adding recumbent seating capability. The attachment includes a platform with seat, backrest, and footrest components that convert an upright-only bicycle into a dual-purpose workstation accommodating both upright and recumbent cycling positions, thus achieving multi-functionality without requiring separate devices
Solution Approach 2:
The REBA is designed as a separable attachment system consisting of distinct components (platform, seat, backrest, footrest, control mechanisms) that can be independently adjusted and positioned. This modular segmentation allows the recumbent features to be added without fundamentally redesigning the entire bicycle structure, maintaining relative simplicity while achieving versatility
2Adaptability or versatility
If a single exercise bicycle is designed to accommodate multiple seating positions, then the adaptability improves, but the device complexity increases
Solution Approach 1:
The REBA merges recumbent seating components with the existing upright bicycle structure by integrating the attachment to the bicycle frame. The platform connects to the existing flywheel and resistance mechanisms, combining both upright and recumbent cycling capabilities into a unified system that shares common structural and mechanical elements, thereby reducing overall complexity compared to having separate devices
3Manufacturing precision
If exercise bicycles use friction brake control, then the ease of operation is simple, but the manufacturing precision of resistance adjustment is insufficient
Solution Approach 1:
The REBA implements dynamic resistance control through interchangeable knob controls that allow precise adjustment of flywheel resistance. The system transitions from static friction brake control to a more sophisticated mechanism where resistance can be dynamically adjusted with greater precision while maintaining ease of operation through user-friendly knob interfaces that provide consistent and repeatable resistance settings
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
REBA provides users with a versatile and inclusive cycling experience, enabling physiological diversification in workouts and accommodating disabled users by allowing comfortable recumbent riding, thus enhancing fitness and rehabilitation options.
Implementation Method 1
utilizing one knob friction brake control
Data Source
AI summary
The Recumbent Exercise Bicycle Attachment (REBA) connects to an upright flywheel type exercise bicycle which utilizes one knob friction brake control. The functionality of the existing upright bicycle is maintained by using the REBA's modified interchangeable controls. The pedals that turn the flywheel and the resistance control of the bicycle are accessed from the REBA by utilizing the seat and rear control which are a part of the REBA. The REBA allows the user to ride either in the upright cycling position or the recumbent cycling position on one machine.