Fishing Reel Brake Layout for Backlash Control and Low Pad Wear
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Solution Overview
Problem
Conventional fishing reels face issues with friction brake wear, noise, and reduced casting distance due to constant braking force, and inertial force brakes are not compatible with both left- and right-handed handles, leading to backlash phenomena, especially at low spool rotational speeds.
Innovation Solution
A fishing reel design incorporating a fixed constant brake and a movable inertial force brake, utilizing a spool cam, fixed and movable pads, and an elastic body to adjust braking force based on spool speed, preventing pad wear and noise, and allowing interchangeable use for left- and right-handed handles.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a friction brake is used to prevent backlash, then the spool rotational speed is reduced, but the brake pad wears and noise increases
Solution Approach 1:
The patent replaces the mechanical friction brake system with a magnetic brake system. The magnetic brake uses magnetic attraction force between a magnet and a ferromagnetic material on the spool to create braking effect without physical contact, thereby eliminating pad wear and noise while still preventing backlash.
Solution Approach 2:
The patent introduces a magnetic field as an intermediary between the brake mechanism and the spool. The magnetic field transmits the braking force without requiring direct mechanical contact, allowing the spool to be slowed down without the wear and noise associated with friction brakes.
2Loss of substance
If a magnet brake is used to prevent pad wear, then noise and wear are reduced, but the casting distance decreases due to constant braking force
Solution Approach 1:
The patent makes the magnetic brake dynamic by coupling it with an inertial mechanism. The movable spool plate moves closer to the braking magnet when the spool rotates at high speed, increasing the braking force, but moves away when the spool rotates at low speed, reducing the braking force. This dynamic adjustment optimizes both wear prevention and casting distance.
Solution Approach 2:
The patent changes the magnetic braking parameter (distance between spool plate and braking magnet) based on the spool's rotational speed. At high speeds, the distance is reduced to increase braking force; at low speeds, the distance is increased to decrease braking force, thereby maintaining optimal casting distance while preventing wear.
3Speed
If an inertial force brake is used to adjust braking force, then the spool speed control is improved, but the brake is not compatible with both left- and right-handed handles
Solution Approach 1:
The patent designs the inertial mechanism with a spool cam that has symmetric inclined surfaces on both sides. This symmetric design allows the movable spool plate to move in the correct direction regardless of whether the spool rotates clockwise or counterclockwise, making the brake compatible with both left-handed and right-handed handles while maintaining speed control.
4Speed
If a friction brake is used to control spool speed, then the rotational braking force is reduced at low speed, but fine-tuning the braking force becomes difficult
Solution Approach 1:
The patent replaces the friction-based mechanical brake with a magnetic brake that allows for easier fine-tuning. The magnetic braking force can be adjusted by changing the distance between the magnet and the ferromagnetic material, which can be done precisely through mechanical adjustments without the limitations of friction-based systems.
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 solution provides adjustable braking force to prevent backlash and increase casting distance, ensuring compatibility with both handle types and maintaining low-speed performance without noise or wear, thereby enhancing user control and reel efficiency.
Implementation Method 1
by using the magnetism of a plurality of braking magnets provided in a reel body, a magnetic force acts on a rotating spool to reduce the rotational speed of the spool
Implementation Method 2
the spool plate approaches the braking magnet by inertial force when the spool rotates
Implementation Method 3
an elastic force of the elastic body may exceed the inertial force, and the pressed part may descend along the pressing part toward the lowest point of the pressing part
Data Source
AI summary
A fishing reel provided with a fixed constant brake and a movable inertial force brake is provided. In the fishing reel, a user may adjust a braking force to use according to his or her fishing method by utilizing only advantages of conventional centrifugal brakes, magnet brakes, and inertial force brakes, the advantages including prevention of pad wear, prevention of casting distance reduction and backlash when a spool rotates at a low speed, compatible use tailored to left-handed or right-handed handles, etc.