Flexible Securing Strap Non-Destructive Door Fastening
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Solution Overview
Problem
Conventional fastening methods for securing lockable boxes and cases to doors damage the door and/or door frame, making non-destructive, tool-free, and rapid assembly and disassembly impossible.
Innovation Solution
A system utilizing a flexible security strap that can be fixed to an object, passed between the door and door frame, and secured on the other side to prevent removal, using a safety bar or thickened end to prevent the strap from being pulled through the door gap when closed, allowing for tool-free and non-destructive attachment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If screws or nails are used to fasten boxes to doors, then theft protection is improved, but the door and door frame are damaged
Solution Approach 1:
The patent introduces a flexible securing strap as an intermediary element between the box and the door. This strap passes through the door gap and can be secured on the other side, providing theft protection without requiring direct penetration or attachment to the door structure, thus avoiding damage while maintaining security
Solution Approach 2:
The patent employs a flexible strap (which can be made of fabric, plastic, or metal) instead of rigid fastening elements. This flexible element can bend and adapt to the door gap geometry, allowing it to pass through and secure the box without exerting concentrated forces that would damage the door or frame
2Reliability
If screws or nails are used to fasten boxes to doors, then theft protection is improved, but assembly and disassembly become complex and time-consuming
Solution Approach 1:
The flexible strap acts as a simple intermediary that can be quickly threaded through the door gap and secured with basic fastening elements on the other side. Disassembly involves simply removing these fasteners and pulling the strap through, eliminating the complexity of screw or nail removal while maintaining security
Solution Approach 2:
The fastening system is segmented into separate functional elements: the flexible strap for passing through the gap, and simple fastening elements (buckles, clips, or ties) for securing on the other side. This segmentation allows each element to be optimized independently and simplifies both assembly and disassembly operations
Data Source
Figure 1~2
AI summary
Disclosed is a device for non-damagingly fastening, to a door (2) and a door frame (9) structure or a window and a window frame structure, an object (8) to be secured in such a way that the object is protected from being stolen, said device comprising: at least one securing strip (6) which can be fixed to the object to be secured on one side and which can be guided between the door (2) and the door frame (9) and can be fixed on the other side.