Ventilating Window Locking Assembly Shielding Means
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Solution Overview
Problem
Existing locking assemblies for ventilating windows are vulnerable to unauthorized access when a flat, stiff object is used to manipulate the actuator slide from outside, as they lack effective protection around the actuator slide, especially in the area where it transitions between locked and unlocked positions.
Innovation Solution
The integration of shielding means between the actuator slide and the outside of the window, which can be part of the casing or an insert in the guide means, prevents unauthorized access by obstructing the path to the actuator slide, particularly when it is in the locked position, without requiring additional components or complicating the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the actuator slide is accessible from outside the window, then the window can be operated for ventilation, but unauthorized access can be obtained by pushing the actuator slide to its first position
Solution Approach 1:
The shielding means is divided into multiple segments or parts that can independently move to provide different levels of access. The shielding means includes a first part and a second part that can be positioned at different locations along the guide means, allowing controlled access for ventilation while preventing unauthorized manipulation when locked
Solution Approach 2:
The shielding means is made movable rather than fixed, allowing it to dynamically adjust its position based on the operational state. When the actuator slide moves between positions, the shielding means follows or adjusts accordingly, providing protection when needed while allowing access during legitimate operation
2Reliability
If shielding means are added to protect the actuator slide, then security against intrusion is improved, but device complexity increases
Solution Approach 1:
The shielding means is integrated with existing components of the locking assembly, specifically combining it with the guide means or casing structure. This merging approach provides intrusion protection without adding completely separate components, thereby limiting the increase in device complexity
Solution Approach 2:
The shielding means serves multiple functions: it provides intrusion protection, guides the actuator slide movement, and may also reduce noise and wear. By making the shielding means multi-functional, the patent avoids adding dedicated components for each function, thus limiting complexity increase
3Device complexity
If metal-to-metal contact occurs between actuator slide and casing, then the structure remains simple, but noise and wear increase
Solution Approach 1:
The shielding means incorporates materials with different properties than pure metal, such as composite materials or materials with noise-dampening characteristics. This allows the structure to remain relatively simple while reducing noise and wear through material selection rather than complex mechanical designs
Data Source
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Figure 5
AI summary
A locking assembly for a ventilating window that has a sash arranged to be openable with respect to a main frame by pivotal movement about an axis that is parallel to a pair of opposed sash members. The locking assembly comprises a strike plate (6) fixed to a main frame member (1) opposite one of said pair of sash members (2) and a casing (102) fixed to said one sash member (2) opposite the strike plate (6). A locking mechanism that is arranged in said casing (102) is operable by an operator member (4) that can be accesses from the inside of the window. The operation of the locking mechanism is done via at least one actuator slide (13) that is displaceable in guide means (14) in the casing between a first end position defining the unlocked position and a second end position defining the locking position. The locking mechanism has shielding means (103) that are fixed in relation to the casing (102) and includes a bridge-like structure covering the actuator slide (13).