Pivotable Latch Bolt That Stays Locked When Unlocked
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Solution Overview
Problem
Tilt latches remain disengaged when the lock is unlocked, allowing doors to be easily opened without a handle or key, and cannot be integrated with electronic door openers due to the unlocking mechanism disengaging the tilt mechanism, requiring precise strike plate adjustments and causing noise during closure.
Innovation Solution
A tilting latch with a switchable latch head and blocking element, featuring a locking connection that remains engaged when unlocked, and a translational slide mechanism with return springs to control the latch's position, allowing it to be opened only with deliberate action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If the latch is designed as a tilt latch that disengages when unlocked, then the door can be easily opened under preload, but the door can be easily pushed open without deliberate action and cannot be integrated with electronic door openers
Solution Approach 1:
The latch mechanism is divided into two independent functional parts: a retraction mechanism controlled by the lock and a tilting mechanism controlled by a separate actuating device. This segmentation allows the lock to control latch retraction while a distinct mechanism controls the tilting action, preventing automatic disengagement when unlocked and enabling integration with electronic door openers.
Solution Approach 2:
A slide mechanism acts as an intermediary between the latch head and the blocking element. The slide guides the translational movement of the latch head and controls the engagement and disengagement of the locking means, providing precise control over when the tilting mechanism becomes active and enabling reliable operation with electronic openers.
2Reliability
If the latch head remains engaged when unlocked, then the door cannot be easily pushed open, but the door cannot be opened under preload with minimal force
Solution Approach 1:
The latch mechanism transitions from a static engaged state to a dynamic tilting state through a deliberate actuating action. The tilting latch head can pivot about its longitudinal axis when the actuating device is activated, allowing the door to be opened under preload with minimal force while maintaining security when unlocked through the engaged locking means.
3Ease of operation
If the strike plate is precisely adjusted for tilt latch operation, then the latch operates smoothly, but the device complexity and adjustment requirements increase
Solution Approach 1:
The slide mechanism automatically guides the translational movement of the latch head and controls the engagement of the locking means with the strike plate. This self-guiding mechanism reduces the need for precise manual adjustment of the strike plate, as the slide ensures proper alignment and smooth operation during latch engagement and disengagement.
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 latch maintains the locked position when unlocked, enabling integration with electronic openers and preventing accidental opening, while allowing opening under preload with minimal force, reducing noise and eliminating the need for precise strike plate adjustments.
Implementation Method 1
The trap stem has a first return spring between the slide and the locking element
Implementation Method 2
The trap head has a second return spring between the locking element and the trap head
Data Source
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AI summary
The invention relates to a tilt latch, as well as a lock or door or window equipped therewith. The invention further relates to a method for operating such a door or window. The tilt latch according to the invention is characterized in that, when the door or window is unlocked, the tilt latch remains in the locked position.