Lowering Bar Anti-Burglary Locking Mechanism
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Solution Overview
Problem
Existing door and window sealing devices with lowering mechanisms offer inadequate burglary protection, as the lowered sealing strip can be easily raised using tools like a goat's foot, allowing access and compromising security.
Innovation Solution
A burglary protection device with a lowering bar and mechanism that incorporates a locking member to prevent external forces from raising the lowered bar, featuring a locking support that absorbs vertical forces and prevents unauthorized lifting, ensuring the bar remains sealed even when subjected to significant external pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lowering mechanism with a sealing strip is used to close the gap between the door and floor, then sealing effectiveness is improved, but burglary protection deteriorates because the sealing strip can be easily lifted with tools
Solution Approach 1:
The device is divided into two functional segments: a sealing strip for sealing and a lowering bar with locking element for security. The lowering bar can be lowered independently to provide burglary protection while the sealing strip provides sealing, allowing both functions to operate separately and effectively.
Solution Approach 2:
The locking element acts as an intermediary between the lowering bar and potential burglary tools. It intercepts and neutralizes external lifting forces before they can affect the sealing strip, preventing tools from engaging with the sealing mechanism.
2Object-affected harmful factors
If the lowering bar is made robust to resist burglary tools, then burglary protection is improved, but the device complexity increases
Solution Approach 1:
The burglar-proofing function is extracted from the sealing strip and placed into a separate lowering bar with a locking element. This allows the sealing strip to remain simple while the security function is handled by a dedicated component designed specifically for resistance to burglary tools.
Solution Approach 2:
Instead of making the entire sealing mechanism robust and complex, the invention inverts the approach by adding a separate protective element (lowering bar with locking element) that provides security without complicating the original sealing mechanism. The protective element is added rather than the core mechanism being modified.
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 device effectively prevents unauthorized access by maintaining the sealing strip in a lowered position, resistant to forces up to four tons, thus enhancing security against burglary attempts.
Implementation Method 1
a locking element (6) that prevents the lowered lowering bar (2) from being raised by external force
Implementation Method 2
The locking support preferably extends from a first end to a second end in a vertical direction when the lowering bar is lowered, thus perpendicular to the longitudinal direction of the device. This blocks further force transmission if an external, unauthorized lifting force acts on the lowered lowering bar
Data Source
Figure 1a~1b
Figure 2a~2b
Figure 3a~3b
AI summary
The invention relates to a device for a door leaf or a window casement comprising a lowering bar (2) and a lowering mechanism (4) for raising and lowering the lowering bar (2). In the lowered position, the lowering bar (2) closes a gap between a floor and the door leaf or window casement. The device is a lowerable intruder protection and comprises at least one locking member (6, 7, 8) which prevents the lowered lowering bar (2) being raised by the application of force from the outside. The device according to the invention provides effective prevention against intrusion by simple means.