Safety Hook Unlocking Mechanism with Bent Safety Plate

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Solution Overview

Problem

Conventional safety hooks have a complex releasing unit structure and inconvenient unlocking mechanism due to perpendicular forces required for operation.

Innovation Solution

A safety hook design featuring a latch unit, a releasing unit, and a safety lock unit with a bent safety plate that rotates from a restraining to a releasing position, allowing for easier unlocking by adjusting the angle of the restraining end portion relative to the latch plate, simplifying the unlocking process.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional releasing unit with multiple pivot axes and perpendicular force application is used, then the safety lock function is achieved, but the structure becomes complicated and operation becomes inconvenient

Engineering Contradiction:

Improvesafety lock functionVSAvoidreleasing unit structure

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The releasing unit is divided into a releasing lever and a safety lock lever that are independently pivotable, allowing each component to perform its function separately and simplifying the overall structure while maintaining safety functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of applying force perpendicular to the latch plate as in conventional designs, the releasing lever applies force in the same direction as the latch plate movement, making operation more intuitive and convenient

Inventive Principle:

Principle #13The other way round (Inversion)

2Reliability

If force is applied perpendicular to the latch plate for unlocking, then the safety lock mechanism functions, but the unlocking operation becomes inconvenient

Engineering Contradiction:

Improvelocking mechanismVSAvoidunlocking operation

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The force application direction is inverted from perpendicular to parallel with the latch plate movement direction, making the unlocking operation more natural and easier to perform while maintaining the reliability of the locking mechanism

Inventive Principle:

Principle #13The other way round (Inversion)

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 design simplifies the unlocking mechanism by reducing the complexity of the releasing unit and making it easier to operate, enhancing user convenience and functionality.

Implementation Method 1

a bent safety plate that is disposed between the latch plate and the releasing plate and that is pivoted to the hook body so as to be rotatable relative to the hook body between restraining and releasing positions

Methodology Applied

Scientific EffectMechanical rotation:

Data Source

PatentUS7444723B2Safety hook

Publication Date: 2008.11.04 USANG INDAL

AI summary

A safety hook includes: a hook body defining a hook mouth; a latch unit including a latch plate pivoted to the hook body so as to be rotatable between locked and unlocked positions, the latch plate having a blocking plate portion; a releasing unit including a releasing plate pivoted to the hook body, the releasing plate having a driving plate portion; and a safety lock unit including a bent safety plate disposed between the latch plate and the releasing plate, pivotable between restraining and releasing positions, and having a restraining end portion abutting against the blocking plate portion, and a driven end portion abutting against the driving plate portion.