Multi-point Lock Assembly for Sliding Doors
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Solution Overview
Problem
Standard fenestration products, such as sliding doors, often lack effective lock mechanisms that provide security without compromising durability, practicality, and economic feasibility, making them vulnerable to unlawful intrusion.
Innovation Solution
A multi-point lock assembly with integrated sensor functionality, featuring a pair of catches aligned in close proximity to enhance security and prevent automatic lock actuation, includes a cam gear, reversal gear, lock cam, link, and spring mechanism to facilitate reliable operation and alignment with strike assemblies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a standard lock mechanism is used in sliding doors, then the door can be locked, but the security against unlawful intrusion is insufficient
Solution Approach 1:
The lock mechanism is divided into multiple independent locking points (first catch and second catch) that engage with separate strike pieces at different locations on the door frame. This segmentation provides enhanced security by distributing the locking function across multiple points rather than relying on a single locking mechanism.
Solution Approach 2:
The patent combines multiple functional elements into an integrated lock assembly including catches, strike pieces, actuation mechanisms, and sensor functionality. This merging creates a comprehensive security system that provides multi-point locking, automatic actuation prevention, and sensor integration within a unified structure.
2Reliability
If multiple locking points are implemented, then security is enhanced, but the device complexity increases
Solution Approach 1:
The lock assembly is designed as a multi-functional unit that performs multiple locking operations through a single integrated mechanism. The first and second catches are part of the same assembly that can be actuated together, providing universal control over multiple locking points while maintaining a unified design that reduces overall system complexity.
Solution Approach 2:
The patent employs a nested arrangement where the first and second catches are positioned within the same lock assembly housing, and the strike pieces are integrated into the door frame structure. This nesting allows multiple locking functions to be contained within compact, organized structures that minimize spatial requirements and simplify installation.
3Strength
If the lock mechanism is made more durable, then it can withstand forced entry, but it may sacrifice practicality and ease of operation
Solution Approach 1:
The lock mechanism includes automatic features such as the first and second catches that can be actuated simultaneously through a single operation, and sensor functionality that automatically detects door position and locking status. This self-service capability maintains ease of operation while providing robust multi-point locking for enhanced durability.
4Ease of operation
If the lock mechanism prevents automatic actuation, then inadvertent locking is avoided, but the mechanism complexity increases
Solution Approach 1:
The patent incorporates sensor functionality that provides feedback on door position and locking status. This feedback mechanism allows the system to detect whether the door is properly closed and positioned before allowing lock actuation, preventing inadvertent locking while maintaining a relatively simple control structure through automatic detection and response.
Data Source
AI summary
Fenestration systems and associated methods include use of a lock assembly having a housing, a cam gear, a reversal gear, and one or more catches. Various aspects relate to enhanced locking/security, including repeatability and overall efficacy.