Compact Stationary Bicycle Under-Desk Attachment
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Solution Overview
Problem
There is no stationary bicycle that can fit under a standard desk with a height of 28½″ to 29½″ and accommodate users of varying heights without their knees contacting the desk.
Innovation Solution
A compact stationary bicycle with a silent drive assembly and attachment system that allows the bicycle to be positioned beneath a desk, featuring a casing mechanically coupled to the silent drive assembly and an attachment assembly that secures the bicycle to a chair, positioning the drive assembly forward of the user's knees.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If a stationary bicycle is designed to fit under a standard desk, then it can be used in limited space, but users of certain heights will have their knees contact the desk
Solution Approach 1:
The bicycle is designed with dynamic positioning capability through the attachment assembly that can secure to chair legs at adjustable positions. This allows the bicycle to move forward relative to the desk, positioning the drive assembly well forward of the user's knees, thereby accommodating users of varying heights while maintaining compact footprint under the desk.
2Volume of moving object
If the drive assembly is positioned closer to the user for compactness, then the bicycle fits better under the desk, but the user's knees will contact the desk
Solution Approach 1:
Instead of adjusting the longitudinal position of the drive assembly, the invention utilizes the vertical dimension by attaching to chair legs at different heights. This allows the drive assembly to be positioned well forward of the knees without increasing the bicycle's longitudinal footprint, effectively moving the problem from one dimension to another.
3Stability of the object's composition
If an attachment system is added to secure the bicycle to the chair, then stability is improved, but device complexity increases
Solution Approach 1:
The attachment system replaces complex mechanical locking mechanisms with a simpler wheel trap design that uses the chair's existing structure (wheel or caster) as part of the attachment mechanism. The wheel traps simply need to fit tightly around the chair's wheel or caster, eliminating the need for separate locking mechanisms while maintaining stability.
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
Enables users of any height to exercise under a standard desk without knee contact, providing stability and adjustable resistance through a magnetic resistance module, thus overcoming the limitations of prior bicycles that required knee alignment above the pedals.
Implementation Method 1
providing stability and adjustable resistance through a magnetic resistance module
Data Source
AI summary
A compact stationary bicycle is configured to fit beneath a desk. The compact stationary bicycle has a silent drive assembly, configured to be driven by a user. A casing is mechanically coupled to the silent drive assembly. An attachment assembly is mechanically coupled to the casing and configured to attach the casing to a chair occupied by the user putting the silent drive assembly well forward of knees of the user. The user of any height can drive the silent drive assembly beneath the desk without contacting the knees with the desk.