Bicycle Tracking Unit Antenna Routing via Crank Hole
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Solution Overview
Problem
Existing tracking units for human-powered vehicles, such as bicycles, face challenges in antenna placement and protection, particularly for vehicles without water bottle racks and in aesthetically sensitive designs, as they are vulnerable to tampering and detection.
Innovation Solution
A tracking unit with an externally mounted antenna positioned near the crank, utilizing existing frame holes and protected by materials like epoxy or polycarbonate, along with motion detection and a backup battery for enhanced security and power reliability, and optionally integrated into a plastic gear wire guide or underside of the frame.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the antenna is mounted externally on the frame at or near the hole below the crank, then the tracking unit is better protected from tampering and harder to detect, but the installation complexity increases due to wiring through the frame
Solution Approach 1:
The patent uses the existing drainage hole below the crank as an intermediary passage to route the antenna wire from the internal tracker to the external antenna mounting position. This mediator approach allows the wire to pass through the frame structure without requiring additional holes or complex routing paths, thereby reducing installation complexity while maintaining the security benefits of external antenna placement.
2Object-affected harmful factors
If the antenna is positioned near the crank hole, then the external antenna length is minimized reducing exposure to tampering, but the wiring path through the frame becomes more constrained
Solution Approach 1:
The patent incorporates a pre-formed groove in the frame structure that guides the wire from the drainage hole to the antenna mounting position. This preliminary preparation of the wiring path during frame manufacturing eliminates the need for complex wire routing during installation, making the wiring process easier while maintaining the optimized antenna position near the crank for minimal exposure.
3Reliability
If the tracking unit is placed inside the frame, then it is better protected from environmental factors and tampering, but the antenna must extend externally requiring additional holes or wiring complexity
Solution Approach 1:
The patent designs the drainage hole below the crank to serve multiple functions: its original purpose for water drainage and a new function as a passage for the antenna wire. This multi-functionality approach allows the tracking unit to remain fully enclosed inside the frame for environmental protection while the antenna wire utilizes the existing drainage infrastructure, avoiding the need for additional holes or complex wiring arrangements.
Data Source
Figure 1
AI summary
Tracking unit (10) for a human-powered vehicle comprising a frame (100), the tracking unit (10) comprising a tracker (1), such as a GPS and/or GSM unit, and an antenna (2) for allowing the tracker (1) to communicate, wherein said tracker (2) is adapted to be placed inside the frame (100) of a human-powered vehicle, and said tracking unit (10) includes a wire (4) adapted to extend from the tracker (1), through a hole (8) below the crank in the frame (100), to the antenna (2) adapted to be mounted externally on said frame (100) at or near said hole (6).