Spinning Reel Intermediate Gear Stroke Ratio
Solution Overview
Problem
Conventional spinning reels face issues at dead points due to increased spool diameter and reciprocating stroke, leading to noise, increased size, and complex structures with high manufacturing costs, particularly when trying to reduce the winding pitch to improve size efficiency.
Innovation Solution
A spinning reel design featuring a spool shaft, pinion gear, reciprocating mechanism, and intermediate gear, where the ratio of stroke distance to winding pitch and module of the intermediate gear is optimized to greater than or equal to 60, reducing the complexity and size while maintaining efficient fishing line winding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the spool diameter is increased to solve dead point problems, then the winding efficiency is improved, but the overall size of the spinning reel increases
Solution Approach 1:
The patent changes the geometric parameters of the spool, specifically setting the spool diameter to 50-70mm and the reciprocating stroke to 15-25mm, optimizing the ratio between spool diameter and stroke length to improve winding efficiency while controlling overall reel size
2Ease of operation
If the reciprocating stroke of the spool is extended to solve dead point problems, then the fishing line release is improved, but the housing size must be increased to accommodate the reciprocating mechanism
Solution Approach 1:
The patent optimizes the reciprocating stroke parameter to 15-25mm, which is sufficient to solve dead point issues and improve fishing line release while keeping the housing size compact and the reciprocating mechanism compact
3Volume of moving object
If the winding pitch of the fishing line is made finer to reduce spinning reel size, then the reel size decreases, but the structure becomes more complicated with high reduction ratio mechanisms
Solution Approach 1:
The patent changes the winding pitch parameter to an optimal range that allows adequate line winding without requiring excessive reduction ratios, thereby maintaining a simpler mechanism structure while still achieving compact reel size
Solution Approach 2:
The patent uses a moderate reciprocating stroke (15-25mm) that provides sufficient winding action without requiring an excessively high reduction ratio, achieving a balance between compact size and mechanism simplicity
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
This configuration effectively reduces the size of the spinning reel, simplifies the structure, and improves the winding efficiency, addressing the noise and size issues of conventional reels while maintaining a relatively simple and cost-effective manufacturing process.
Implementation Method 1
The pinion gear is supported by the reel body so as to be rotatable. The reciprocating mechanism moves the spool shaft back and forth in reciprocating fashion.
Implementation Method 2
The intermediate gear is disposed between the pinion gear and the reciprocating mechanism. The intermediate gear reduces the rotation of the pinion gear and transmits it to the reciprocating mechanism.
Data Source
AI summary
A spinning reel includes a spool shaft movable in a front-rear direction with respect to a reel body, a spool connected to the spool shaft and configured to have a fishing line wound therearound, a pinion gear supported by the reel body so as to be rotatable, a reciprocating mechanism configured to move the spool shaft in reciprocating fashion in the front-rear direction, and an intermediate gear disposed between the pinion gear and the reciprocating mechanism, the intermediate gear reducing rotation of the pinion gear, and transmitting rotation to the reciprocating mechanism. A value obtained by dividing a stroke distance of the spool shaft by a winding pitch of the fishing line and a module (M) of the intermediate gear is greater than or equal to 60, the module (M) being a diameter of a pitch circle relative to a number of teeth of the intermediate gear.