Injection-Molded Bobber Stem Assembly for Fixed-Slip Conversion
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Solution Overview
Problem
Existing fishing bobbers either function as fixed or slip bobbers but not both, and existing methods for combining these functions are cumbersome or inefficient.
Innovation Solution
A method of assembling a fishing float using injection molding to create a stem from two semicircular parts with aligned slots and a spring mechanism that allows for both fixed and slip bobber functions, utilizing a single piece or two-piece configurations with features like flanges, bulbs, and tapered regions to secure the spring in place.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a bobber is designed to function as both fixed and slip bobber with conversion capability, then versatility is improved, but device complexity increases
Solution Approach 1:
The bobber body is divided into two separate hemispherical parts (first part and second part) that can be assembled together. The spring mechanism is segmented into coils that can be compressed and expanded. This segmentation allows the bobber to convert between fixed and slip modes by simply separating or compressing the parts, achieving versatility without excessive complexity.
Solution Approach 2:
The spring mechanism provides dynamic conversion between fixed and slip bobber modes. When the spring is in its expanded state, the bobber functions as a fixed bobber with the line held in slots. When compressed, the parts separate allowing line movement for slip bobber function. This dynamic mechanism enables mode conversion through simple compression rather than complex assembly changes.
2Adaptability or versatility
If a spring mechanism is added to enable mode conversion, then functionality is improved, but manufacturing complexity increases
Solution Approach 1:
The spring is pre-formed with specific coil configurations and slot positions during manufacturing. The first and second parts are pre-shaped as hemispheres with integrated slot structures. This preliminary preparation allows the final assembly to be simple - merely compressing the spring causes the pre-configured slots and parts to align and function automatically, reducing assembly complexity despite the added functionality.
3Reliability
If slots are positioned closer to the opening for better line control, then fishing performance is improved, but structural strength decreases
Solution Approach 1:
The slots are positioned at specific locations on the stem - closer to the opening where line control is most needed, rather than uniformly distributed. The spring mechanism provides localized reinforcement at these slot positions, allowing the walls to be thinner at slot locations while maintaining overall structural integrity. This local quality approach enables better line control without compromising overall stem strength.
Data Source
AI summary
The invention is directed to a method of making a stem of a fishing float. The method includes a first step of using injection molding to form a first stem part, a second step of using injection molding to form a second stem part, and a third step of mounting the first stem part to the second stem part.