Fishing Reel Drag Knob Split Design for Wear Replacement
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Solution Overview
Problem
Conventional drag knobs in fishing reels suffer from economic inefficiency, design issues, and operability problems due to uniform construction, leading to excessive frictional wear and potential damage when used with fishing gloves, necessitating replacement of the entire knob and compromising design aesthetics.
Innovation Solution
The drag knob is designed with a split operating member comprising a cover and an insert, where the fixing member and sounding member overlap with the knob, allowing for separate replacement of the knob and enhancing grip and sound production, thereby improving economic efficiency, design, and operability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the operating member is constituted from a single member, then the structure is simple, but the knob undergoes excessive frictional wear and requires replacement of the entire drag knob
Solution Approach 1:
The operating member is divided into two separate components: a cover and an insert. The cover is a outer component that protects the insert, while the insert is the inner component that directly contacts the user's hand and experiences frictional wear. This segmentation allows the insert to be replaced independently when worn, without replacing the entire drag knob assembly, thereby reducing replacement costs and improving ease of repair.
2Ease of operation
If the fixing member and sounding member are disposed to overlap with the knob, then the space for gripping is improved, but the arrangement becomes more complex
Solution Approach 1:
The fixing member and sounding member are positioned in the axial direction (depth dimension) rather than only in the radial direction. By arranging these components to overlap with the knob when viewed from the axial direction, the design creates a recessed area that enhances grip accessibility without significantly increasing the overall radial size of the drag knob. This dimensional arrangement optimizes the balance between operational ease and structural compactness.
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 allows for the replacement of only the worn-out knob, offers design flexibility, and improves grip and sound production, enhancing the overall economic efficiency, design, and operability of the drag knob.
Implementation Method 1
The sounding member produces a percussive sound by rotation of the operating member
Implementation Method 2
a fixing member for attaching the cover to the insert
Data Source
AI summary
A drag knob includes an operating member and a sounding member. The operating tuber has a cover, an insert, and a bolt serving as a fixing member for fixing the cover to the insert. The operating member is rotatably attached to a reel body. The sounding member produces a percussive sound by rotation of the operating member. The operating member has a knob that extends in a radial direction. The bolt and the sounding member are disposed so as to overlap with the knob when viewed in an axial direction.