Telescopic Fishing Rod Internal Line Insertion Mechanism
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Solution Overview
Problem
Traditional telescopic fishing rods with external line guides are not conducive to easy line insertion, particularly when compactness and user comfort are considerations, as they require lateral line insertion through an opening that can be cumbersome.
Innovation Solution
A telescopic fishing rod design featuring an assembly of sections that allow for internal line insertion, with retention mechanisms to maintain the tip in a semi-retracted position, facilitating line guidance and insertion by preventing the tip from moving out of the line input passage under gentle forces, and utilizing movable line guide elements to create a tunnel-like structure for easy line passage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If sections are designed to fit within each other for compactness, then the rod becomes more compact and portable, but line insertion becomes more difficult due to limited access to the line input passage
Solution Approach 1:
The rod allows dynamic positioning of sections between fully retracted and fully deployed states. The operator can stop the retraction process at an intermediate position where the tip section is partially withdrawn from section N0, creating optimal access to the line input passage for line insertion. This dynamic adjustment resolves the contradiction by allowing the rod to be compact when not in use, yet easily accessible for line insertion when needed.
2Ease of operation
If the tip is allowed to move freely during line insertion, then line guidance is simplified, but the tip may move out of position under applied forces making insertion difficult
Solution Approach 1:
The retention mechanism automatically engages and disengages based on the position and movement of the tip section. When the tip is pushed toward section N0 during line insertion, the retention mechanism naturally engages to hold it in position. When the tip is pulled away, the mechanism automatically releases. This self-regulating behavior provides line guidance stability without requiring complex external control systems.
3Adaptability or versatility
If sections are designed with precise fitting dimensions for smooth retraction, then the rod achieves better telescopic functionality, but manufacturing precision requirements increase
Solution Approach 1:
The rod is divided into multiple sections (N0, intermediate sections, and tip) that can be manufactured independently with standard tolerances. Each section is designed with specific fitting features that allow them to telescope together smoothly. The segmentation approach allows each component to be manufactured separately with reasonable precision requirements, while the overall assembly achieves smooth telescopic functionality through the coordinated design of the section interfaces.
Data Source
AI summary
A fishing rod includes at least three telescopic sections: a first section, N0, a last tip section, and an intermediate section. The first section defines a line input passage on the periphery thereof. The rod goes from fully retracted to deployed positions, and a semi-retracted position, called the line input position, in which section N0+i, i≥1, is deployed with respect to section N0 and in which the tip is received into such section. A first retainer abuts, in the semi-retracted position, against the tip to retain the tip with respect to section and prevent it from reaching the line input passage. A second retainer holds the tip in the semi-retracted position when subjected to forces of less than 10 N tending to move it away from section N0, in a location at less than 30 centimetres, from a position of abutment against the first retainer.