Hook assembly

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Solution Overview

Problem

Existing hook assemblies for hanging objects on walls face challenges in easily separating from the bonded surface without damaging the wall, particularly when using pressure-sensitive adhesive tapes, which compromise the weight capacity due to varying adhesive strengths.

Innovation Solution

A hook assembly design featuring a hook part with a saw-toothed mechanism and a gear system that allows the adhesive tape to be detached by moving the hook part in a specific direction, utilizing a hinge for separation and exposing the adhesive tape for easy removal, along with an auxiliary hook part for versatile object handling.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If adhesive strength of the adhesive tape is increased to support heavier objects, then the weight capacity is improved, but the ease of separation from the bonded surface deteriorates

Engineering Contradiction:

Improveadhesive strengthVSAvoidease of separation

Core Design Contradiction:

StrengthVSEase of operation

Solution Approach 1:

The adhesive tape is segmented into multiple layers including a release layer, adhesive layer, and backing layer. The release layer can be easily peeled off to expose the adhesive, allowing controlled application and removal without compromising the adhesive strength itself. This segmentation enables the adhesive to maintain strong bonding while allowing easy separation of the release layer.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A release layer acts as an intermediary between the user and the adhesive tape. This intermediate layer provides ease of handling and separation during application and removal, while the underlying adhesive layer maintains its full bonding strength when properly applied to the bonded surface.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If adhesive strength of the adhesive tape is decreased to enable easy separation, then the ease of separation is improved, but the weight capacity deteriorates

Engineering Contradiction:

Improveease of separationVSAvoidweight capacity

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The adhesive tape structure separates the functions of handling/separation and bonding. The release layer handles the separation function with low adhesion, while the adhesive layer maintains high bonding strength for supporting weights. This allows easy separation without sacrificing weight capacity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different layers of the adhesive tape have different adhesive properties. The release layer has low adhesion for easy separation, while the adhesive layer has high adhesion for strong bonding. This local differentiation of properties resolves the contradiction between ease of separation and weight support capacity.

Inventive Principle:

Principle #3Local quality

3Strength

If a nail is driven into the wall to firmly fix the hook, then the weight capacity is improved, but the wall surface damage and safety risk deteriorate

Engineering Contradiction:

Improvefirm fixationVSAvoidwall surface damage

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The mechanical system of driving nails into the wall is replaced with a chemical bonding system using adhesive tapes. This substitution eliminates the need for physical penetration and damage to the wall surface while providing sufficient fixation strength through adhesive bonding.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The fixation method transitions from mechanical insertion (nails) to chemical adhesion (adhesive tapes). By changing the bonding parameter from physical penetration to chemical bonding, the system achieves firm fixation without wall surface damage or safety risks associated with nail driving.

Inventive Principle:

Principle #35Parameter changes

4Strength

If a nail is driven into the wall to firmly fix the hook, then the weight capacity is improved, but the safety risk to the user deteriorates

Engineering Contradiction:

Improvefirm fixationVSAvoiduser injury risk

Core Design Contradiction:

StrengthVSObject-affected harmful factors

Solution Approach 1:

The dangerous mechanical action of driving nails into walls is replaced with safe adhesive bonding. Users can apply and remove the adhesive hook assembly without risk of injury from nail drivers or flying debris, while still achieving firm fixation for supporting weights.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The adhesive hook assembly is designed as a disposable or easily replaceable unit that eliminates the need for dangerous installation procedures. The entire assembly can be applied and removed safely without tools, reducing user injury risk while maintaining adequate fixation strength during use.

Inventive Principle:

Principle #27Cheap short-living objects (Disposable)

Data Source

PatentUS9797549B2Hook assembly

Publication Date: 2017.10.24 SUBARU TECNICA INTERNATIONAL

AI summary

A hook assembly is convenient for use and is easily detached from a bonded surface. The hook assembly includes a hook including a hook part containing a hook member on which an object is hung to be supported thereby and an attachment part attaching the hook part to a bonded surface, and an adhesive tape attaching the attachment part to the bonded surface.