Rotatable Reel Line Guide for Uniform Winding and Longer Casting

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Solution Overview

Problem

Existing baitcast reels face challenges in balancing the requirements for uniform line winding during retrieval and maximizing casting distance and reducing friction during pitching, leading to reduced casting performance and lower catch success rates.

Innovation Solution

A reel line guide device with a button transmission mechanism that adjusts the angle of the passage hole to minimize friction during retrieval and maximize space for high-speed line movement during pitching, using a clutch cam and transmission gears to rotate the guide relative to the reel assembly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Manufacturing precision

If the guide hole is made smaller to ensure uniform line winding during retrieval, then line winding uniformity is improved, but casting distance and line movement speed deteriorate due to increased friction

Engineering Contradiction:
Improveline winding uniformityVSAvoidcasting distance
Core Design Contradiction:
Manufacturing precisionVSLength of moving object

Solution Approach 1:

The guide hole is made rotatable relative to the reel assembly through a button transmission mechanism. During retrieval, the guide hole is positioned to minimize rotation and maintain a smaller effective opening for uniform line winding. During pitching, the guide hole rotates to maximize the effective opening, reducing friction and allowing faster line movement for greater casting distance. This dynamic adjustment resolves the contradiction between line winding uniformity and casting distance.

Inventive Principle:
Principle #15Dynamics

2Reliability

If the guide hole is made smaller to minimize friction during retrieval, then line winding smoothness is improved, but line movement speed and casting performance worsen

Engineering Contradiction:
Improveline winding smoothnessVSAvoidline movement speed
Core Design Contradiction:
ReliabilityVSSpeed

Solution Approach 1:

The guide hole's rotational capability allows it to dynamically adjust its orientation and effective opening size. During retrieval operations, it maintains a configuration that minimizes friction and ensures smooth line winding. During pitching operations, it rotates to a configuration that maximizes the effective opening, reducing friction resistance and enabling higher line movement speeds for improved casting performance.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The physical orientation and effective dimensions of the guide hole are changed based on operational requirements. By rotating the guide hole to different angles, the effective opening size and friction characteristics are modified. This parameter change allows the system to optimize for either smooth line winding or high-speed line movement depending on whether retrieval or pitching is being performed.

Inventive Principle:
Principle #35Parameter changes

3Measurement precision

If the guide hole is made smaller to ensure uniform line winding, then line control precision is improved, but casting distance and water entry point accuracy deteriorate

Engineering Contradiction:
Improveline control precisionVSAvoidcasting distance
Core Design Contradiction:
Measurement precisionVSLength of moving object

Solution Approach 1:

The rotatable guide hole dynamically adjusts its effective opening based on the operational phase. During retrieval, it maintains a configuration that provides precise line control and uniform winding. During pitching, it rotates to a configuration that maximizes casting distance and optimizes water entry point accuracy by reducing friction-induced trajectory deviations.

Inventive Principle:
Principle #15Dynamics

Data Source

PatentUS12557801B2Reel line guide device, baitcast reel and fishing tackle
Publication Date: 2026.02.24 SHENZHEN BOSAIDONG TECH CO LTD
  • US12557801B2 patent drawing
  • US12557801B2 patent drawing
  • US12557801B2 patent drawing

AI summary

A reel line guide device for use in a baitcast reel is disclosed, the reel line guide device including: a mount provided with a mounting position for accommodating a reel assembly; a guide arranged on the mount and positioned on one side of the mounting position, the guide being provided with a passage hole for a fishing line on the reel assembly to pass through; and a button transmission mechanism arranged on the mount and including a button assembly and a transmission assembly, the transmission assembly being connected to the button assembly and the guide to drive the guide to rotate under the action of the button assembly, so as to adjust an angle of the passage hole of the guide relative to the reel assembly. A baitcast reel having the above-mentioned reel line guide device, and a fishing tackle are further disclosed.