Handle Assembly for Dual-Bearing Reel
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Solution Overview
Problem
Existing dual-bearing reels with handle assemblies struggle to instantly and reliably rotate the handle shaft in the fishing-line winding direction using a hand opposite to the hand operating the handle assembly, due to the angular positioning of handle knobs which are typically 180 degrees apart, making it difficult to wind fishing line effectively.
Innovation Solution
A handle assembly design featuring a handle arm with radially protruding portions and coupling portions that allow for easy operation with a hand opposite to the handle assembly, including a plate-shaped handle arm with attachment, arm, and protruding portions that are circumferentially aligned and coupled to facilitate rotation of the handle shaft in the fishing-line winding direction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the drag regulation member is used to rotate the handle shaft, then drag force can be regulated, but the handle shaft cannot be reliably rotated with the opposite hand when drag force is weakened
Solution Approach 1:
The drag regulation member is designed with multi-functionality: it serves both as a drag force regulation mechanism and as a source of auxiliary operating portions for rotating the handle shaft. The auxiliary operating portions are strategically positioned to be accessible to the opposite hand, ensuring that the handle shaft can be reliably rotated regardless of the drag force setting, thus resolving the contradiction between adaptability and reliability
Data Source
AI summary
A dual-bearing reel attachable to a fishing rod, comprising, a reel unit, a handle shaft rotatably supported by the reel unit, and a handle assembly being mounted onto the handle shaft. The handle assembly includes a handle arm and a handle knob rotatably attached to a tip of the first arm portion. The handle arm includes an attachment portion detachably attached onto the handle shaft in a unitarily rotatable state, a first arm portion extending radially outwards from the attachment portion, first and second protruding portions disposed around of the attachment portion, and a coupling portion. The first and second protruding portions are protruding radially outwards. The first and second protruding portions are circumferentially aligned at predetermined intervals. The coupling portion couple the protruding portions.