Pedaling Exercise Device Restriction Mechanism for Stability
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Solution Overview
Problem
Existing pedaling exercise devices are unstable and difficult to carry when the handle portion is lifted, as the cranks and links rotate, causing the wheels to separate from the rolling surface.
Innovation Solution
Incorporating a restriction portion with engagement mechanisms, such as an extension shaft, groove portion, magnet, or brake portion, to prevent the wheels from separating from the rolling surface when the handle is lifted, ensuring stability and ease of carrying by maintaining contact between the wheels and the surface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the handle portion is lifted to enable carrying, then the portability is improved, but the cranks and links rotate causing the wheels to separate from the rolling surface, resulting in instability
Solution Approach 1:
The restriction portion is designed to preemptively prevent the harmful rotation of cranks and links when the handle is lifted. The engagement portion on the rolling surface interacts with the extension shaft to create a mechanical constraint that opposes the natural rotation tendency, thereby preventing wheel separation before it occurs during the carrying operation
Solution Approach 2:
The extension shaft connected to the wheel's central shaft acts as an intermediary element that mediates between the wheel and the engagement portion on the rolling surface. This intermediary component transmits the restraining force from the engagement portion to the wheel, ensuring the wheel remains in contact with the rolling surface during handle lifting
2Adaptability or versatility
If the wheels are allowed to separate from the rolling surface during handle lifting, then the mechanism has greater freedom of movement, but the device becomes unstable and difficult to carry
Solution Approach 1:
The restriction portion employs a dynamic engagement mechanism where the engagement portion and extension shaft interact to provide conditional constraint. The mechanism allows normal operational movement during exercise use while automatically engaging to prevent separation only when the handle is lifted for carrying, thus adapting the degree of freedom based on the operational state
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
The pedaling exercise device remains stable and easy to transport by restricting wheel separation from the surface, allowing for secure operation and convenient handling.
Implementation Method 1
the restriction portion may include a magnet member provided on the upper surface of the rolling surface in a direction of the reciprocation and configured to attract the extension shaft of the central shaft of the wheels by magnetic force
Data Source
AI summary
A pedaling exercise device includes a rotation mechanism configured to pivotally support a rotation shaft to allow rotation, a pair of cranks having first ends connected to both ends of the rotation shaft of the rotation mechanism, respectively, a pair of links having first ends rotatably connected to second ends of the cranks, respectively, and having second ends provided with wheels, respectively, a pair of pedal portions connected to the links along a longitudinal direction of the links, respectively, a rolling surface connected to a first end of the rotation mechanism on a user side, and a restriction portion configured to restrict separation of the wheels from the upper surface of the rolling surface in a case where the first end of the rotation mechanism is lifted such that the rotation mechanism is erected in a state where a second end of the rotation mechanism is grounded.