Door Locking Bolt Reinforcement Against Deformation

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Solution Overview

Problem

Existing door systems are vulnerable to unauthorized access when the door leaf is deformed by force, causing the locking mechanism to disengage and allowing the door to be opened despite the locking device being in the locking position.

Innovation Solution

A reinforcement element with a projection is placed adjacent to the bolt receptacle on the side facing away from the potential break-in side, which blocks the bolt when it no longer engages in the receptacle due to deformation, maintaining the locking effect and preventing the door from being opened.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If the door leaf is made slimmer for optical advantage, then the aesthetic appearance is improved, but the structural strength and resistance to deformation is reduced

Engineering Contradiction:
Improvedoor profile thicknessVSAvoidresistance to deformation
Core Design Contradiction:
ShapeVSStrength

Solution Approach 1:

The reinforcement system is segmented into multiple components: reinforcement elements with projections positioned at specific locations, base plates for distribution, and multiple locking elements. This segmentation allows the thin door leaf to gain strength through distributed support rather than requiring a thick uniform structure throughout.

Inventive Principle:
Principle #1Segmentation

Solution Approach 2:

The reinforcement elements extend into the third dimension by projecting from the base plate toward the locking elements. This vertical projection creates a mechanical barrier that prevents bolt disengagement without requiring increased door leaf thickness, thus maintaining the slim profile while adding functional depth for security.

Inventive Principle:
Principle #17Another dimension (Dimensionality change)

2Device complexity

If a simple locking mechanism is used, then the device complexity is reduced, but the security against burglary is insufficient

Engineering Contradiction:
Improvelocking mechanism structureVSAvoidburglary protection
Core Design Contradiction:
Device complexityVSReliability

Solution Approach 1:

The reinforcement elements with projections are pre-positioned in the locking path before any break-in attempt occurs. When the door leaf deforms under attack, the projections automatically engage with the locking elements to prevent disengagement, providing preliminary protective action without requiring complex active control systems.

Inventive Principle:
Principle #10Preliminary action

Solution Approach 2:

The reinforcement elements act as intermediary components between the door leaf structure and the locking mechanism. They transfer and distribute the forces applied to the door, preventing direct transmission of deformation forces to the locking elements, thus protecting the simple locking mechanism while enhancing security.

Inventive Principle:
Principle #24Intermediary (Mediator)

3Ease of manufacture

If the reinforcement element is installed separately from the bolt receptacle, then the ease of installation is improved, but the structural integration is reduced

Engineering Contradiction:
Improveinstallation simplicityVSAvoidstructural integration
Core Design Contradiction:
Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The reinforcement system is divided into separable components: base plates that can be independently positioned and secured to the floor, and reinforcement elements that attach to these base plates. This segmentation allows for easy installation and adjustment while the multiple connection points and coupling sections provide sufficient structural integration for security requirements.

Inventive Principle:
Principle #1Segmentation

Data Source

PatentEP2535486B1Door system
Publication Date: 2020.02.19 GEZE GMBH
  • EP2535486B1 patent drawingFigure 1a~1b
  • EP2535486B1 patent drawingFigure 2a~3c
  • EP2535486B1 patent drawingFigure 4~5

AI summary

The door system (1) has a locking device which locks door panel (2), in its closed position. A locking element (8) is arranged in a driving device (7). A locking element is provided with a bolt (6) which is engaged with bolt receptacle (9), when locking element is in locking position. The door panel is deformed by the introduction of force in the direction perpendicular to plane of door. The projection is arranged adjacent to bolt receptacle, on potential intrusion side of door panel.