Fly Fishing Reel Brake Assembly for Low-Inertia Backlash Control
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Solution Overview
Problem
Conventional fishing reels experience significant startup inertia and backlash when a fish is on the line, leading to line tangling and potential breakage, with existing solutions being cumbersome or inadequate.
Innovation Solution
A fishing reel with a brake assembly that includes pivotally mounted pawls biased by springs, which move outward under centrifugal force to contact the housing and slow spool rotation, featuring a damping mechanism and reversible mounting for left or right-hand use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional reel brake is used to prevent line backlash, then line tangling is avoided, but significant startup inertia is created causing line stress and potential breakage
Solution Approach 1:
The brake assembly transitions from a static friction brake to a dynamic centrifugal brake where the braking force automatically adjusts with spool rotation speed. At high speeds (line retrieval), centrifugal force presses brake pads against the spool creating strong braking. At low speeds (startup), braking force naturally decreases, minimizing startup inertia and line stress.
Solution Approach 2:
The braking parameter (friction force) changes dynamically based on rotational speed. The centrifugal mechanism converts rotational kinetic energy into braking force, creating a variable friction coefficient that increases with speed. This eliminates the need for fixed brake settings and automatically adapts to different fishing conditions.
2Force
If the reel is permitted to freely spin to reduce startup inertia, then line stress is reduced, but backlash occurs causing line to tangle
Solution Approach 1:
The brake assembly is self-regulating and requires no user intervention. The centrifugal mechanism automatically engages the brake based on spool rotation speed alone. When the line is pulled and spool accelerates, centrifugal force automatically applies braking; when spool slows, braking releases automatically. This eliminates the need for manual drag adjustment during fishing.
Solution Approach 2:
The system uses rotational speed as feedback to automatically control braking force. The centrifugal mechanism continuously monitors spool speed through the rotation itself, creating a closed-loop control system where braking force is proportional to rotational velocity. This automatic feedback prevents both overheating and line breakage.
3Force
If a fixed drag setting is used on conventional reels, then line tension is controlled, but adjustment is cumbersome requiring manual intervention
Solution Approach 1:
The brake assembly is self-regulating and requires no user intervention. The centrifugal mechanism automatically adjusts braking force based on spool rotation speed alone. When the line is pulled and spool accelerates, centrifugal force automatically applies braking; when spool slows, braking releases automatically. This eliminates the need for manual drag adjustment during fishing.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The brake assembly minimizes startup inertia and reduces backlash by applying variable braking force, ensuring controlled line retrieval and reducing the risk of line breakage during fishing.
Implementation Method 1
Rotation of the fishing reel upon the fishing line being pulled out of the fishing reel when a fish pulls on the fishing line causes a centrifugal force that moves the contact surface of the plurality of pawls into contact with the internal circumferential surface
Implementation Method 2
Biasing members, such as cantilever springs, may be used to urge the brake pawls back toward the center of rotation, away from contact with the housing
Implementation Method 3
A damping member, such as an O-ring or rubber band may provide a stop for the pawls as they return toward the center of rotation under the biasing forces of the spring, thus preventing noise and rattling
Data Source
AI summary
A fishing reel and related method include a housing, a spool, and a brake assembly. The housing includes an external circumferential surface and an internal circumferential surface. The spool is configured to have a length of fishing line wound thereon, and is rotatable relative to the housing about a rotation shaft. The brake assembly is mounted to and rotatable with the spool. The brake assembly includes a plurality of pivotally mounted pawls. The plurality of pawls each include a contact surface arranged facing the internal circumferential surface. Rotation of the fishing reel upon the fishing line being pulled out of the fishing reel when a fish pulls on the fishing line causes a centrifugal force that moves the contact surface of the plurality of pawls into contact with the internal circumferential surface to reduce a rotational speed of the spool relative to the housing.