Segmented Wrench Head for Grasping Rounded Corners

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Solution Overview

Problem

Existing adjustable wrenches face difficulties in effectively grasping objects with damaged or rounded corners, as they rely on convex portions and notches that are not suited for such irregular surfaces.

Innovation Solution

The wrench features a driving head segment with multiple driving sections and recesses aligned along intersecting axes, forming hooks that can grasp objects with damaged or rounded corners by pivoting and rotating to apply driving force effectively.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If convex portions and notches are used in the jaw design, then the wrench can grasp standard objects with sharp corners effectively, but the wrench cannot grasp objects with damaged or rounded corners

Engineering Contradiction:

Improveability to grasp different object shapesVSAvoidgrasping reliability on irregular objects

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The driving side is divided into multiple driving sections (first driving section, second driving section, etc.) with different surface configurations. Each section can independently contact and apply force to different parts of the object, allowing the wrench to adapt to various object shapes including rounded or damaged corners.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different driving sections have different surface characteristics (e.g., convex portions, recesses, notches) tailored to contact specific features of the object. The first driving section may have convex portions for sharp corners, while the second driving section has recesses for rounded corners, allowing localized adaptation to different object geometries.

Inventive Principle:

Principle #3Local quality

2Force

If the jaw design relies on convex portions abutting against corners, then the wrench provides good grip on standard objects, but it fails to provide effective driving force on objects with rounded or damaged corners

Engineering Contradiction:

Improvedriving force applicationVSAvoidcompatibility with irregular object surfaces

Core Design Contradiction:

ForceVSAdaptability or versatility

Solution Approach 1:

The driving side is segmented into multiple driving sections that can independently engage with the object. This segmentation allows the wrench to distribute driving force across multiple contact points, ensuring effective force application even when the object has rounded or damaged surfaces that cannot provide traditional corner engagement.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Instead of relying solely on convex portions protruding from the jaw to engage with object corners, the design incorporates recesses in the driving sections that can receive and engage with rounded or damaged object surfaces. This inversion of the traditional convex-only approach enables effective grasping of irregular objects.

Inventive Principle:

Principle #13The other way round (Inversion)

Data Source

PatentUS11426840B2Wrench capable of applying driving force on object to be driven effectively

Publication Date: 2022.08.30 HONG ANN TOOL INDS

AI summary

A wrench has a driving head segment defining a portion of a receiving space of the wrench and including a first driving side of the wrench. The driving side includes a plurality of driving sections for abutting against the object. The plurality of driving sections includes surfaces aligned along an axis. The driving side includes a plurality of first recesses disposed alternatively among the plurality of first driving sections.