Shutter Handle Security Device with Movable Covering Element
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Solution Overview
Problem
Existing security devices for shutters and frames are mechanically complex, unreliable, and insecure, as they require keys for operation, making them difficult to open in emergencies and vulnerable to unauthorized access, including child tampering and external manipulation.
Innovation Solution
A security device featuring a movable covering element with elastic means and shape-interfering locking mechanisms that securely locks and unlocks the handle by translating between distal and proximal positions, preventing unauthorized rotation while allowing easy operation for adults and hindering child access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a key-operated lock is used on the handle, then security against unauthorized opening is improved, but ease of operation during emergencies deteriorates
Solution Approach 1:
The key-operated locking mechanism is extracted and removed from the handle system. Instead, a simple push-button unlocking mechanism is implemented, eliminating the need for keys while maintaining security through the button's positioning and the handle's mechanical design.
Solution Approach 2:
The handle system provides self-service functionality through the push-button mechanism that allows any adult to quickly unlock and open the window without requiring external assistance or specialized knowledge of key operations, especially important during emergencies.
2Ease of operation
If an unlocking button is placed on the handle throat, then ease of operation is improved, but security against external manipulation deteriorates
Solution Approach 1:
The button is repositioned from the front throat area to the rear side of the handle, changing its spatial dimension and accessibility. This rear positioning makes it invisible and inaccessible from the outside while remaining easily accessible from the inside for authorized users.
Solution Approach 2:
The button serves as an intermediary element that mediates between the user's intent to open and the mechanical locking system. Its strategic positioning on the rear side allows it to fulfill its unlocking function while acting as a security barrier against external manipulation attempts.
3Reliability
If the button requires high force to prevent child tampering, then security against child access is improved, but ease of operation by adults deteriorates
Solution Approach 1:
The button is designed with differentiated local qualities: it is positioned in a location naturally accessible to adults (rear side of handle) but inaccessible to children, and its mechanical engagement with the locking mechanism is calibrated to require minimal force that adults can easily apply while being unreachable by children's smaller hands and fingers.
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 solution provides a simple, reliable, and aesthetically pleasing security mechanism that prevents unauthorized opening by children and intruders, ensuring quick and easy operation for adults while maintaining the appearance of the handle and frame.
Implementation Method 1
elastic means, adapted to automatically lead said covering element to said distal position
Data Source
Figure 1A~1B
Figure 2
Figure 3
AI summary
It is disclosed a security device (1) for shutters and frames (100) of the type that comprise an activating lever (2) rotatable around a rotation axis (R-R) between at least one closed position and at least one open position, said activating lever (2) comprising a handle (3) and an operating shaft (4) to activate a clamping mechanism for shutters and frames, a washer (5) provided with a hub (9) for supporting said activating lever (2), and a covering element (7) adapted to cover at least partially said washer (5), said covering element (7) being provided with a through-hole (7a) for passing a coupling portion (12) of said activating lever (2), characterized in that said covering element (7) is movable between a distal position (P1) and a proximal position (P2) with respect to said washer (5) and in that it comprises countering elastic means (13) to hold said covering element (7) in said distal position (P1), and shape-interfering locking means (14) between said covering element (7) and said coupling portion (12) of the activating lever (2) to prevent the rotation of the activating lever (2) when said covering element (7) is in said distal position (P1), and to allow the rotation of the activating lever (2) when said covering element (7) is in said proximal position (P2). It is also disclosed a method for locking and unlocking a handle (3) by means of a security device (1) for shutters and frames (100) characterized by comprising the steps of a) rotating the activating lever (2) to lead it in said at least one closed position, b) locking the handle (3) by leading the covering element (7) in a distal position (P1) with respect to the washer (5), c) unlocking the handle (3) by leading said covering element (7) in a proximal position (P2) with respect to the washer (5) and d) rotating the activating lever (2) to lead it in at least one open position, wherein said step b) is carried out by means of shape-interfering locking means (14) between the covering element (7) and a coupling portion (12) of the activating lever (2).