Spinning Reel Line Roller Rotation Regulation
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Solution Overview
Problem
Spinning reel line rollers experience relative rotation due to dimensioning errors, leading to squeaking noises as the guide member and bushing scrape against each other.
Innovation Solution
Incorporation of a rotation regulation part, such as elastic O-rings or protrusions, that contact the inner or outer surfaces of the guide member and bushing to prevent relative rotation, ensuring smooth operation and reducing frictional noise.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the bushing is press-fitted into the guide member to prevent rotation, then the guide member remains fixed relative to the bushing, but dimensioning errors cause relative rotation and scraping noises
Solution Approach 1:
A rotation regulating part is introduced as an intermediary element between the guide member and bushing. This mediator prevents direct contact and scraping between the guide member outer surface and bushing inner surface, eliminating squeaking noises while accommodating dimensional variations through its compliant or adjustable nature.
Solution Approach 2:
The rotation regulating part allows for parameter adjustments or variations in the rotational constraint mechanism. By changing the constraint method from rigid press-fit to a regulated system, the design accommodates dimensional errors while maintaining prevention of harmful relative rotation.
2Object-generated harmful factors
If a rotation regulation part is added to prevent relative rotation, then squeaking noises are eliminated, but the device structure becomes more complex
Solution Approach 1:
The rotation regulation part is applied locally at the critical interface between the guide member and bushing, rather than redesigning the entire assembly. This localized approach targets the specific problem area (relative rotation causing noise) without unnecessarily complicating the overall device structure.
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 rotation regulation part effectively prevents squeaking and misalignment, ensuring quiet and reliable operation of the line roller by regulating the relative movement between the guide member and bushing, thereby enhancing the overall performance of the spinning reel.
Implementation Method 1
The rotation regulating part can comprise one or more elastic bodies (for example, the first O-ring 151, the second O-ring 155, the elastic protrusion 151Q, the elastic protrusion 155Q) disposed on the first surface and that contacts with the second surface.
Data Source
AI summary
A line roller for guiding a fishing line to a spool of a spinning reel for fishing includes a cylindrical guide member, a cylindrical bushing, a bearing and a rotation regulating part. The cylindrical guide member includes a guide surface configured to guide the fishing line on an outer circumferential surface thereof. The cylindrical bushing supports the inner circumferential surface of the guide member. The bearing includes an inner race, an outer race supporting the inner circumferential surface of the bushing, and a rolling element disposed between the inner race and the outer race, and rotatably supporting the bushing with respect to the base member. The rotation regulating part regulates relative rotation between the guide member and the bushing by being disposed on one of either the inner circumferential surface of the guide member or the outer circumferential surface of the bushing and contacting the other surface.