Chamfered Slider Lock for Window and Door Glazing Beads
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Solution Overview
Problem
Existing U-shaped glazing beads in window or door frames are prone to deformation under high wind loads and can be easily dislodged during burglary attempts, posing risks of panel disengagement, while burglary-resistant alternatives are costly and difficult to install.
Innovation Solution
A slider lock is integrated into the fitting groove of the frame, allowing lateral sliding and featuring a chamfered edge to secure the glazing bead's second leg, preventing unintentional unclipping and enhancing wind and burglary resistance without requiring new glazing beads.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a classic U-shaped glazing bead is used, then it is easy to insert and cost-effective, but it deforms under high wind loads and can be easily dislodged during burglary attempts
Solution Approach 1:
The locking system is divided into separate functional components: the glazing bead remains a simple U-shaped profile for easy installation, while a separate lock mechanism with sliding block and chamfer features provides enhanced security. This segmentation allows each component to be optimized independently - the bead for ease of installation and the lock for security.
Solution Approach 2:
The lock acts as an intermediary element between the glazing bead and the fitting groove. The sliding block with chamfer features mediates the interaction by providing a mechanical barrier that prevents unauthorized removal while allowing legitimate installation through controlled sliding motion.
2Reliability
If a burglary-resistant tubular glazing bead with rigid bridging is used, then resistance to wind load and burglary is improved, but cost increases and installation becomes difficult
Solution Approach 1:
Instead of creating a complex integrated tubular structure, the solution segments the security function into a separate lock mechanism that attaches to the simple U-shaped bead. This maintains manufacturing simplicity while achieving burglary resistance.
Solution Approach 2:
The lock mechanism uses dynamic sliding blocks that move during installation and then lock into position. The sliding blocks can laterally slide during installation for easy mounting, then engage with the chamfer features to provide rigid security when installed.
3Strength
If increased rigidity is provided in the glazing bead, then wind load resistance is improved, but the ability to clip and stay in place during seal placement is reduced
Solution Approach 1:
The sliding blocks provide dynamic behavior - they are movable during the installation phase to allow the glazing bead to be clipped into place, then they engage with the chamfer features to create a rigid locked structure that resists wind loads.
Solution Approach 2:
The sliding blocks are positioned to first allow easy clipping of the glazing bead into the fitting groove, and only after the bead is in place do they engage with the chamfer features to provide the locked rigid structure. This preliminary action sequence enables both ease of installation and subsequent strength.
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 lock ensures secure retention of glazing beads against wind and unauthorized removal, improving burglary resistance and impact resistance while being compatible with standard U-shaped beads, and easily installable on existing systems.
Implementation Method 1
the lock is provided with two side edges, respectively a first side edge oriented toward the first undercut edge and a second side edge oriented toward the second undercut edge, whereby the second side edge of the lock is provided with a chamfer which, by co-operating with the clip detail on the second leg of the glazing bead, is intended to automatically slide the lock when clipping in the second leg in the direction of the first leg into a first outer sliding position while blocking the first leg against unintentional unclipping in the fitting groove
Data Source
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AI summary
Lock for locking a glazing bead (11) in a fitting groove (10) of a profile (3) of a frame (2) of a window or door (1), whereby the lock (15) is executed as a slider which fits in the fitting groove (10) with a certain lateral play and whereby the lock (15) is laterally slideable in the fitting groove (10) in the transversal direction of the fitting groove (10), and whereby the lock (15) is provided with two side edges, respectively a first side edge (18) and a second side edge (19), whereby the second side edge (10c) of the lock (15) is provided with a chamfer (20) which is intended to automatically slide the lock (15) when clipping in the glazing bead (11) into a first outer sliding position whereby the glazing bead (11) is blocked in the fitting groove (10) against unintentional unclipping.