Anti-burglary Mechanism for Roller Shutters with Three Blocking Positions
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Solution Overview
Problem
Existing anti-burglary mechanisms for roller shutters can only block at two positions, are not easily installable in all types of side guides without disassembly, and have a short useful life due to mechanical damage or aging of elastic deformable parts.
Innovation Solution
An anti-burglary mechanism with a guiding element and mouthpiece that allows for three blocking positions without deformable parts, enabling installation and replacement without disassembling side guides, and is adaptable to all types of side guides.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If elastic curved or serpentine tabs are used as blocking mechanism, then the roller shutter can be blocked at two positions, but the mechanism has short useful life due to mechanical damage or aging of plastic material
Solution Approach 1:
The patent replaces the elastic curved or serpentine tabs (which are prone to mechanical damage and aging) with a robust blocking profile that has a longer useful life. The new design uses a rigid structure with a blocking face and guiding element that does not rely on elastic deformation, thereby eliminating the weakness of the previous plastic material aging issue.
Solution Approach 2:
The patent substitutes the elastic deformation-based blocking mechanism with a rigid mechanical blocking profile. Instead of using elastic tabs that bend and deform, the new system uses a rigid profile with a blocking face that physically prevents movement at predetermined positions, thereby improving reliability and eliminating the aging problem of plastic materials.
2Adaptability or versatility
If blocking mechanism is designed for specific side guide type, then the mechanism can be built in that guide type, but it cannot be installed in all types of side guides without disassembly
Solution Approach 1:
The patent designs the blocking mechanism with a universal structure that can be installed in all types of side guides (first, second, and third types) without requiring disassembly or modification of the guide itself. The guiding element and blocking profile are configured to work with the existing side guide structures, thereby achieving multi-functionality and broad compatibility.
Solution Approach 2:
The patent divides the blocking mechanism into separate components (guiding element, blocking profile, mouthpiece) that can be independently installed on the side guides. This segmentation allows the mechanism to be adapted to different side guide types without requiring disassembly of the guides themselves, as each component can be positioned and secured independently.
3Reliability
If only two blocking spots are provided, then the mechanism structure is simple, but the security against unwanted entry is insufficient
Solution Approach 1:
The patent adds a third blocking position along the vertical movement path of the roller shutter slats. Instead of only two blocking spots, the new design incorporates three predetermined blocking positions at different heights, thereby increasing the security against unwanted entry by providing more opportunities to prevent intrusion while maintaining a relatively simple overall structure.
Data Source
Figure 1
Figure 2
Figure 3~4
AI summary
The basic characteristic of the anti-burglary mechanisms (6) and (6.1) for roller shutters (1) is its guiding element (7), which is fixedly positioned inside the guide channel (22) in the side guides (5a) and (5b), along which slats (2) with the end slat (2.1) travel, and which consists of a guide plate (9) and supporting plate (12) perpendicular to it. In the guide plate (9) of the guiding element (7), there are integrated protrusion (11) and protrusion (10), which is surrounded by a closed guide channel (9a) and open guide channel (9b) that are interconnected. The closed guide channel (9a) is characterized by curves with blocking spots (14a, 14b, 14c) enabling safety blocking of the roller shutter (1) if it is fully closed or partially open by a distance (H) from the bottom window sill or door threshold (4). The anti-burglary mechanism (6) or (6.1) can also be built in the guides of an insect screens.