House Door Wing Snap Connection for Panel Attachment

Solution Overview

Problem

Existing methods for attaching house door panels to frames, such as gluing or adhesive tapes, are time-consuming, require extensive quality control, and often result in unpredictable material distortions and a lack of a tight and solid connection due to the use of adhesives with different shore hardnesses, leading to potential warping of the panels.

Innovation Solution

A mechanical clip connection using a non-rotatable or centrally rotating clip body on the casement frame, which securely fastens the door panel via a mushroom-shaped cross-section clip body and profile groove system, ensuring a tight and adjustable fit without the need for adhesives, and allowing for easier installation and thermal load compensation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Productivity

If adhesive connection methods are used to attach the door panel to the frame, then the connection can be made, but the process becomes time-consuming and requires extensive quality control

Engineering Contradiction:

ImproveInstallation speedVSAvoidQuality control time

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent replaces the adhesive connection system with a mechanical clip connection system. The clip body with mushroom-shaped cross-section and profile groove creates a purely mechanical attachment between the door panel and frame, eliminating the need for adhesives and associated quality control processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the connection parameter from chemical bonding (adhesive) to mechanical interlocking (clip and groove). This parameter change transforms the connection method from one requiring curing time and quality inspection to one that provides immediate visual confirmation of proper installation.

Inventive Principle:

Principle #35Parameter changes

2Reliability

If adhesives with different shore hardnesses are used to attach the door panel, then the connection can be made, but unforeseeable and uncontrollable distortions occur leading to warping

Engineering Contradiction:

ImproveConnection stabilityVSAvoidPanel flatness

Core Design Contradiction:

ReliabilityVSStability of the object's composition

Solution Approach 1:

The patent replaces the adhesive connection system with a mechanical clip connection system. The clip body with mushroom-shaped cross-section and profile groove creates a purely mechanical attachment between the door panel and frame, eliminating the need for adhesives and associated quality control processes.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the connection parameter from chemical bonding (adhesive) to mechanical interlocking (clip and groove). This parameter change transforms the connection method from one requiring curing time and quality inspection to one that provides immediate visual confirmation of proper installation.

Inventive Principle:

Principle #35Parameter changes

3Strength

If a non-rotatable or centrically rotating clip body is used, then a tight and solid connection is achieved, but the design becomes more complex compared to simple adhesive application

Engineering Contradiction:

ImproveConnection strengthVSAvoidClip body design

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The patent divides the connection system into distinct functional elements: the clip body with mushroom-shaped cross-section, the profile groove in the frame, and the corresponding profile rail on the door panel. This segmentation allows each element to be optimized for its specific function while maintaining overall simplicity.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies local quality by giving the clip body a mushroom-shaped cross-section with different dimensions at different locations. The larger diameter portion engages with the profile groove to provide anchoring, while the smaller diameter portion allows for insertion and rotation, creating a location-specific functional design.

Inventive Principle:

Principle #3Local quality

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 mechanical clip connection provides a secure, adjustable, and cost-effective attachment that eliminates the issues of adhesive-based methods, ensuring a firm and tight connection between the door panel and frame while allowing for thermal compensation and reducing installation time and quality control complexities.

Implementation Method 1

a fastening means (7) for producing a mechanical clip connection between the house door panel (5) and the casement frame (3)

Methodology Applied

Scientific EffectMechanical interlocking: Mechanical Fastener

Implementation Method 2

The mechanical connection compensates for thermal loads with a 'floating' attachment

Methodology Applied

Scientific EffectThermal expansion compensation: Thermal Expansion

Data Source

PatentEP2754836B1House door wing with snap connection

Publication Date: 2021.07.07 OBUK HAUSTURFULLUNGEN

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AI summary

The house door leaf (1) with a leaf frame (3) made of metal or plastic, and leaf covering door panel (5) that fixedly and tightly abuts the leaf frame and having a fastener (7) for fastening the door panel. The fastener has a clip connection with a rotationally fixed or concentrically rotating clip main portion (9) arranged at recess (13) formed in outer surface (11) of the leaf frame.