Lock Assembly with Directional Latching for Noiseless Operation
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Solution Overview
Problem
Existing lock assemblies for doors and windows face issues such as inability to close when the latching system is engaged, noisy operation, complex manufacturing, and dual fitting inaccuracies, which can lead to damage and unreliable locking.
Innovation Solution
A lock assembly design featuring a compressionally or frictionally affixed engaging element that can be inserted into the latching system in one direction and blocked in the opposite direction, eliminating the need for biased bolts or detent elements, allowing for noiseless operation and reliable locking without play.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a traditional latching system with biased bolts is used, then the door can be locked securely, but the door cannot be closed when the latching system is already engaged, and accidental damage may occur
Solution Approach 1:
The patent inverts the traditional latching mechanism by allowing the engaging element to be inserted freely in the closing direction even when the latching system is engaged, while blocking removal in the opening direction. This reversal of directional freedom resolves the contradiction by enabling door closure regardless of latching state while maintaining secure locking.
Solution Approach 2:
The patent implements dynamic directional control where the latching system transitions from a static blocked state to a dynamic state where insertion is permitted but removal is prevented. The asymmetric blocking mechanism adapts its constraints based on the direction of force applied, allowing door closure while preventing accidental damage.
2Reliability
If a dual fitting system is used to ensure uniform door contact and play-free latch engagement, then reliable locking is achieved, but manufacturing complexity and installation difficulty increase due to fitting inaccuracies and thermal warping
Solution Approach 1:
The patent changes the geometric parameters of the engaging element and latching system to eliminate the need for precise dual fitting. By designing the engaging element with asymmetric blocking geometry and allowing controlled play in the closing direction, the system achieves reliable engagement without requiring high-precision fitting or compensation for thermal warping.
3Reliability
If traditional locking mechanisms are used, then secure locking is achieved, but noisy operation occurs during door closing
Solution Approach 1:
The patent applies beforehand cushioning by designing the latching system to absorb and dampen impact forces before they can generate noise. The asymmetric blocking mechanism and engaging element geometry are configured to gradually engage and cushion the locking action, preventing sudden impacts and reducing operational noise while maintaining secure locking.
Data Source
AI summary
The invention relates to a lock assembly (10) of a planar component (22) displaceably mounted in frame (30). Said assembly (10) comprises an engaging element (40) which, in said planar component's closed position, can be fixed in place in a latching system (50). Said latching system is designed in a manner that, in its blocked position, the engaging element, for instance a bar affixable by compression and/or friction in the latching system (50), can be inserted into latter in a first direction (R) opposite the direction of closing (X) of the planar component (20), whereas such insertion is blocked in a second direction (S) which is opposite said planar component's direction of opening (O). This design allows almost noiselessly operating the lock assembly. The planar component also may be closed when the latching system is in the blocked position already when the planar component is open. Moreover all double fittings are averted and as a result the said planar component always can be closed and be locked in play-free manner.