Adjustable Fishing Rod Guide Cover for Secure Reel-Attached Fit

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Solution Overview

Problem

Existing fishing rod covers fail to reliably protect and accommodate the rod tip and tail portions, especially when a reel is attached, and often result in detachment of the rod from the cover structure due to movement or mismatched dimensions.

Innovation Solution

A fishing rod guide cover with adjustable and detachable connection portions, using hook-and-loop fasteners or other attachments, to securely fit and protect rod tip and tail portions of various dimensions and types, preventing detachment.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a fixed-length cover structure is used to accommodate the rod tip and tail portions, then the structure is simple, but the rod may detach from the cover when the rod length varies or a reel is attached

Engineering Contradiction:
Improverod retention in coverVSAvoidcover structure
Core Design Contradiction:
ReliabilityVSDevice complexity

Solution Approach 1:

The connection portion between the first and second cover portions is made adjustable in length, transforming the static cover structure into a dynamic one that can adapt to different rod lengths and configurations. This allows the cover to reliably accommodate rods with or without reels while preventing detachment.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The adjustable connection portion enables the single cover structure to serve multiple functions: accommodating rods of various lengths, accommodating rods with reels attached, and preventing rod detachment. This multi-functional design eliminates the need for multiple different cover types.

Inventive Principle:
Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If a single fixed cover is used for all rod types, then the device is simple, but it cannot accommodate rods of various dimensions and types effectively

Engineering Contradiction:
Improveaccommodation of various rod typesVSAvoidcover structure
Core Design Contradiction:
Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The adjustable-length connection portion allows the cover to dynamically adapt its configuration to match different rod dimensions and types, providing universal accommodation capability without requiring multiple specialized covers.

Inventive Principle:
Principle #15Dynamics

Solution Approach 2:

The length parameter of the connection portion is made variable, allowing the cover structure to adjust its overall length and configuration to accommodate different rod types and dimensions effectively.

Inventive Principle:
Principle #35Parameter changes

3Reliability

If the connection portion length is fixed, then the manufacturing is simple, but the rod may move longitudinally and detach from the cover

Engineering Contradiction:
Improverod position stabilityVSAvoidcover structure
Core Design Contradiction:
ReliabilityVSEase of manufacture

Solution Approach 1:

The adjustable connection portion provides longitudinal stability to prevent rod movement and detachment while maintaining manufacturing simplicity through the use of detachable components that can be assembled using standard fastening methods.

Inventive Principle:
Principle #15Dynamics

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 cover effectively protects and securely accommodates rod tip and tail portions, accommodating rods of varying dimensions and types without detachment, enhancing reliability and ease of use.

Implementation Method 1

each of the first detachable portion, the second detachable portion, or the detachable member is detachable by a hook-and-loop fastener

Methodology Applied
Scientific EffectHook-and-loop fastener: Velcro

Data Source

PatentUS12550877B2Fishing rod guide cover
Publication Date: 2026.02.17 DAIWA SEIKO CORPORATION
  • US12550877B2 patent drawing
  • US12550877B2 patent drawing
  • US12550877B2 patent drawing

AI summary

A fishing rod guide cover capable of not only protecting a rod tip portion and a rod tail portion of a fishing rod regardless of whether or not a reel or the like is attached, but also preventing the fishing rod from being detached from a cover structure, while simply and reliably accommodating and detaching the fishing rod of various types and dimensions. A fishing rod guide cover including a first cover portion capable of accommodating a rod tip portion of a fishing rod, and a second cover portion capable of accommodating a rod tail portion of the fishing rod, in which the first cover portion and the second cover portion are connected to each other via a connection portion, and a length in an extending direction of the connection portion is adjustable.