Knotless Fishing Lure Line Attachment Mechanism

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Solution Overview

Problem

Existing fishing lures require complicated knots for attaching fishing lines, which can fail during use, especially in challenging conditions, and often snag on vegetation, making retrieval difficult and reducing catch rates.

Innovation Solution

A fishing lure with a head and body structure that locks onto a fishing line without knots, featuring a channel with flared jaws that close to secure the line, and a flexible weed guard to prevent snagging.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If conventional knot-tying methods are used to attach fishing line to lure, then the attachment can be made with simple structures, but the process becomes time-consuming and complex for inexperienced users

Engineering Contradiction:

Improveease of line attachmentVSAvoidtime to attach line

Core Design Contradiction:

Ease of operationVSLoss of time

Solution Approach 1:

The patent replaces the manual knot-tying mechanical system with a snap-fit mechanical system. The lure body includes a receptacle with a snap-fit mechanism that mechanically engages with a corresponding feature on the fishing line, eliminating the need for users to tie knots and significantly reducing attachment time and complexity

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent introduces an intermediate connector component that serves as a mediator between the fishing line and the lure body. This connector features a snap-fit mechanism that simplifies the attachment process by providing a pre-formed interface, eliminating the need for users to perform complex knot-tying operations

Inventive Principle:

Principle #24Intermediary (Mediator)

2Reliability

If conventional eyelet attachments are used, then the structure remains simple, but the attachment reliability decreases during fish retrieval

Engineering Contradiction:

Improveattachment securityVSAvoidattachment structure complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent employs a dynamic snap-fit mechanism that transitions from an open state during attachment to a locked state during retrieval. The receptacle includes movable components that engage with the fishing line connector to form a secure mechanical lock, providing reliable attachment security while maintaining relatively simple structural elements

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The attachment system is divided into separate functional segments: a receptacle portion integrated into the lure body, a connector portion on the fishing line, and a snap-fit mechanism that joins them. This segmentation allows each component to be optimized for its specific function while maintaining overall structural simplicity

Inventive Principle:

Principle #1Segmentation

3Productivity

If hooks are exposed without protection, then fish can be effectively hooked, but vegetation and debris cause frequent snags during retrieval

Engineering Contradiction:

Improvefish catch rateVSAvoidsnagging on vegetation

Core Design Contradiction:

ProductivityVSObject-affected harmful factors

Solution Approach 1:

The patent employs a flexible weed guard in the form of a thin, flexible barrier that surrounds the hook assembly. This flexible shell allows the hook to remain exposed and functional for catching fish while providing a protective barrier that prevents vegetation and debris from snagging on the hook during retrieval

Inventive Principle:

Principle #30Flexible shells and thin films

Solution Approach 2:

The patent converts the potential harm of vegetation snagging into a benefit by using the flexible weed guard to selectively block vegetation contact while maintaining hook accessibility. The guard acts as a filter that allows legitimate targets (fish) to be hooked while deflecting harmful elements (vegetation, debris) away from the hook

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

4Reliability

If fish can swallow hooks deeply, then hooking effectiveness increases, but hook removal becomes difficult and harmful to the fish

Engineering Contradiction:

Improvehooking effectivenessVSAvoiddamage to fish

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent incorporates a pre-configured hook stop structure on the lure body that prevents the hook from being swallowed too deeply by the fish. This preliminary structural constraint ensures that the hook remains within a safe depth range, maintaining effective hooking while preventing excessive penetration that would cause harm to the fish

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentUS20250204505A1Fishing lure line attachment system

Publication Date: 2025.06.26 FOX WILLIAM

AI summary

The present invention discloses a fishing lure for knotless line attachment. The fishing lure comprises a nose portion and a tail portion configured to be assembled together. The nose portion includes a proximal hole sized to receive a fishing line. A funnel is formed in the tail portion, and aligned with the proximal hole to guide the fishing line into a groove formed in the tail portion. The groove extends from a top of the tail portion to a gap defined between the nose portion and the tail portion when assembled. A coupling mechanism, such as a threaded engagement, enables rotation or movement of the nose portion relative to the tail portion to securely clamp the fishing line without requiring a knot. The lure further comprises radial grippers to engage the line, wings to guide the line, and an optional flexible weed guard to reduce snagging on underwater debris.