Bicycle Carrier Rotatable Arm Segmentation
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Solution Overview
Problem
Existing bicycle transport devices for motor vehicles fail to easily maintain a bicycle in a vertical position during fastening, obstructing the user's ability to rotate the rotatable arm and secure the bicycle with both hands free.
Innovation Solution
A device featuring a rotatable arm with a curved lower part for easy grasping and an inclined intermediate part, combined with catching means that include a first and second jaw for secure vertical positioning and locking of the bicycle, allowing the user to rotate the arm and fasten the bicycle to the carrier with both hands free.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bicycle is rested onto the device, then the bicycle is kept in a vertical position, but the bicycle obstructs the user from easily rotating the rotatable arm and fastening the catching means
Solution Approach 1:
The rotatable arm is divided into two separate parts: a lower part that the user grasps for rotation, and an upper part connected to the catching means. This segmentation allows the user to rotate the lower part without obstruction from the bicycle, while the upper part remains positioned to properly engage the bicycle frame for secure fastening.
Solution Approach 2:
The lower part of the rotatable arm acts as an intermediary element between the user and the upper part connected to the catching means. By grasping and rotating the lower part, the user can indirectly position the upper part and catching means without the bicycle obstructing the direct interaction, thus enabling easy operation while maintaining reliable vertical positioning.
2Reliability
If the rotatable arm is positioned to fasten the catching means to the bicycle tube, then the bicycle can be secured, but the user cannot easily rotate the arm while the bicycle is in place
Solution Approach 1:
Dividing the rotatable arm into lower and upper parts enables the user to rotate the lower part freely for positioning, while the upper part with catching means is positioned to securely engage the bicycle frame tube, achieving both ease of operation and fastening security.
Solution Approach 2:
The lower part of the rotatable arm is designed to be grasped and rotated first to position the upper part and catching means in the correct orientation before the actual fastening operation, allowing preliminary positioning without obstruction from the bicycle.
Data Source
Figure 1
Figure 2
Figure 3a~3b
AI summary
A device (10) is described for transporting bicycles on motor vehicles, comprising: a small channel (12) connectable through supporting means to the roof of a motor vehicle, an arm (14) connected rotating to the small channel (12), and catching means (15) connected to the rotatable arm (14) to catch the bicycle and keep it in a vertical position when its wheels are abutted onto the small channel (12), the rotatable arm (14) comprising a lower part (18) connected rotating to the small channel (12) and arranged laterally thereto, in order to find itself, with respect to a longitudinal direction (L) of the small channel (12), on the loading part (C) of the bicycle on the device (10).