Spinning Reel Guard Positioning Mechanism
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Solution Overview
Problem
In spinning reels, the reel unit guard is prone to displacement in the upward-downward direction from the chassis or lid member, leading to potential wobbling and a step formation between components.
Innovation Solution
The reel unit guard is secured by a protruding portion on the guard and a restriction portion on the lid member or chassis, which engages to prevent downward displacement, ensuring stable positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the reel unit guard is positioned in contact with the chassis and lid member in the forward-backward direction, then the guard can be easily assembled, but the guard is prone to displacement in the upward-downward direction causing wobbling
Solution Approach 1:
The invention introduces a new dimensional constraint by adding protrusions on the reel unit guard that extend in the upward-downward direction, engaging with corresponding recesses on the chassis or lid member. This adds a vertical dimension to the positioning system, preventing upward-downward displacement while maintaining the original forward-backward contact for ease of assembly.
Solution Approach 2:
The protrusions and recesses act as intermediary elements between the reel unit guard and the chassis/lid member. These intermediary features provide a positive mechanical stop that prevents direct displacement between the main components, serving as a mediator that ensures stable positioning without interfering with the primary assembly contact.
2Reliability
If the reel unit guard is fixed with screws and engagement, then the guard is securely positioned, but the structure becomes more complex
Solution Approach 1:
The invention segments the positioning function into two independent parts: protrusions on the reel unit guard and corresponding recesses on the chassis or lid member. This segmentation allows each component to contribute to the positioning mechanism independently, achieving secure positioning through simple geometric features rather than complex fastening systems.
Solution Approach 2:
The protrusion-recess configuration enables the reel unit guard to self-position and self-lock in the vertical direction through its own geometric features, without requiring additional fasteners or complex adjustment mechanisms. The structure serves itself by using the guard's own protrusions to prevent displacement.
Data Source
AI summary
A spinning reel configured to forwardly reel out a fishing line includes a handle, a spool, a rotor, an oscillating mechanism, a rotor drive mechanism, and a reel unit. The reel unit includes a fishing rod attachment leg, a chassis, a lid member, a reel unit guard, a protruding portion, and a restriction portion. The chassis has a mechanism attachment space to accommodate the oscillating mechanism and the rotor drive mechanism. The protruding portion protrudes towards at least one of the chassis and the lid member from an inner lateral surface of the reel unit guard. The restriction portion is disposed on at least of the chassis and the lid member. The restriction portion is engaged with the protruding portion to restrict the reel unit guard from moving in a direction away from the fishing rod attachment leg.