Chamber Profile Screw Mounting to Prevent Jamming and Falling

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Solution Overview

Problem

Existing methods for mounting chamber profiles using screws face issues such as screws falling inside the profile or jamming, especially in difficult-to-reach areas like window frame guides, leading to improper fixation.

Innovation Solution

A specially designed screw with a threaded portion and a head, where the threaded portion is shorter than or equal to the sum of profile chamber heights and wall thicknesses, ensuring the screw rests on at least two profile walls during installation and the head is fully embedded after mounting, preventing jamming and providing a secure, hidden fixation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the screw length is shorter than the profile height, then the screw is hidden within the profile after mounting, but the screw can fall inside the profile during installation

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidinstallation reliability

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The patent introduces an intermediary structure (the profile wall itself) that acts as a guide and stop for the screw head. The screw head is designed to rest on the profile wall during installation, preventing it from falling inside the profile, while still allowing the screw to be fully hidden after mounting.

Inventive Principle:

Principle #24Intermediary (Mediator)

2Length of moving object

If the screw length is similar to the profile chamber height, then the screw can be long enough to reach the component, but the screw can jam inside the profile chamber between two inner walls

Engineering Contradiction:

Improvescrew lengthVSAvoidinstallation ease

Core Design Contradiction:

Length of moving objectVSEase of operation

Solution Approach 1:

Instead of making the screw longer to ensure it reaches the component, the patent inverts the approach by designing the screw head to rest on the profile wall during installation. This prevents the screw from jamming inside the profile chamber while still maintaining sufficient length to reach and secure the component.

Inventive Principle:

Principle #13The other way round (Inversion)

3Reliability

If the screw head is large enough to prevent falling inside, then the screw cannot be fully embedded in the profile after mounting

Engineering Contradiction:

Improveinstallation reliabilityVSAvoidaesthetic appearance

Core Design Contradiction:

ReliabilityVSShape

Solution Approach 1:

The patent changes the parameters of the screw head design, specifically its height and diameter, to optimize both functions. The screw head is designed with specific dimensional relationships to the profile wall thickness and chamber height, allowing it to rest on the wall during installation while being fully embedded after mounting, achieving both reliability and aesthetics.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP3317591B1Mounting method of chamber profile using a bracket screw

Publication Date: 2021.02.24 FLOREK RYSZARD

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AI summary

Mounting method relating to a chamber profile (10) mounted on a stationary component (5) using a screw (20), wherein the threaded portion (1) of the screw (20) is shorter than or of the same length as the sum of heights of all chambers (3) and thicknesses of profile (10) internal walls through which the screw (20) passes, whereas the height of the head (2) has a suitable dimension so that its distance from the nearest internal surface (4a) of the profile wall through which the screw head (2) passes is shorter than the length of the threaded portion screwed in the stationary component (5), so that during installation and dismantling of the profile the screw rests on at least two profile walls.