Door Shielding Structure with Welded Metal Sheets
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Solution Overview
Problem
Existing door shielding solutions fail to provide adequate anti-burglary, fire, thermal, and sound insulation while maintaining aesthetic appeal, particularly in renovation and new door applications.
Innovation Solution
A door shielding structure comprising two bent sheets welded flat-to-flat along the uprights, with filler plates and a cup sheet interposed between the front and rear panels, providing enhanced security and insulation through a rigid assembly that distributes force and leverages the metal parts' resistance to vibrations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If metal sheets are fixed by screwing or bolting, then assembly is easier, but anti-burglary protection and structural integrity are insufficient
Solution Approach 1:
The patent replaces mechanical fastening systems (screws, bolts) with welding connections to join metal sheets. This substitution eliminates the weaknesses of mechanical fasteners against prying and leverage attacks, providing superior anti-burglary protection while maintaining structural integrity. The welding creates a monolithic structure that cannot be easily separated or pried apart.
Solution Approach 2:
The patent employs a composite structure consisting of multiple metal sheets (casing sheet, cup sheet, filler plate) joined together through welding. This composite construction combines the strengths of different metal components to create a multi-layered shielding system that provides enhanced anti-burglary, fire, thermal, and sound insulation properties while maintaining aesthetic appearance.
2Reliability
If multiple filler plates are added, then insulation performance improves, but device complexity increases
Solution Approach 1:
The patent implements a nested structure where the cup sheet forms a cup-shaped recess that contains the filler plate, which in turn contains additional insulation materials. This nested arrangement allows multiple functional layers to be integrated in a compact configuration, improving insulation performance while managing structural complexity through hierarchical organization of components.
Solution Approach 2:
The filler plate serves multiple functions simultaneously: it provides thermal insulation, fire protection, sound insulation, and structural support. By designing a single component that fulfills multiple roles, the patent improves overall reliability and insulation performance without proportionally increasing device complexity.
3Stability of the object's composition
If welding is used to join sheets, then structural integrity and vibration resistance improve, but manufacturing complexity increases
Solution Approach 1:
The patent replaces mechanical joining methods with welding to create permanent, rigid connections between metal sheets. This substitution provides superior vibration resistance and structural stability by eliminating loose connections, while the welding process, though more complex, creates a more durable and secure assembly that meets high-security requirements.
4Strength
If the cup sheet is rigidly secured to panels, then structural strength improves, but force distribution and leverage resistance decrease
Solution Approach 1:
The patent introduces the filler plate as an intermediary element between the cup sheet and the front panel. This intermediary layer decouples the rigid connection, preventing direct transmission of prying forces and leverage attacks from the exterior to the interior panels. The filler plate absorbs and distributes applied forces, enhancing resistance to forced entry while maintaining overall structural strength.
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 structure offers superior anti-burglary protection, improved fire and thermal insulation, and enhanced sound insulation by distributing forces and leveraging metal parts' resistance to vibrations, while maintaining a secure and aesthetically pleasing design.
Implementation Method 1
two sheets each configured by bending and fixed to each other by flat-to-flat welding along the two uprights of the door
Data Source
Figure 1
Figure 2~3
Figure 4~5
AI summary
The shielding structure according to the invention comprises an outer sheet (10) and a recessed sheet (20). The outer sheet 10 is configured by folding itself to form a plate (11) that covers the entire rear face of the door and extends beyond it, along two lateral door jambs, wrapping around the perimeter of the door over its edge, before forming a fold (13) which, on the front face of the door, covers a facade panel (3) over a limited width along the two jambs. The recessed sheet (20) is positioned at an intermediate point within the thickness of the door, separating the facade panel (3) from a filler plate (4) and forming a recess to receive this filler plate over the entire surface of the door behind the facade panel.