Multi-Point Lock with Sliding Cam Mechanism
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Solution Overview
Problem
Single-point mortise locks used in patio and sliding glass door manufacturing are easily broken or disengaged due to their small size and simple construction, while multi-point locks offer increased security but are larger and more expensive, and most doors are only designed for single-point locks.
Innovation Solution
A multi-point lock design featuring a housing with a slide mechanism and multiple locking elements that translate along a locking axis, including a cam and linkage system, with adjustable locking elements and bias springs to enhance security and fit within standard door openings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a single-point lock is used, then the lock is small and cost-effective, but it is easily broken or disengaged by insignificant force
Solution Approach 1:
The locking mechanism is divided into multiple independent locking elements (at least two locking elements) that can be actuated separately. Each locking element engages with the keeper independently, distributing the security function across multiple points rather than relying on a single vulnerable locking point.
Solution Approach 2:
The locking elements are made movable relative to the housing, allowing them to transition between engaged and disengaged states. The locking elements can be actuated individually or simultaneously through the cam mechanism, providing dynamic control over the locking state while maintaining security through multiple active locking points.
2Reliability
If a multi-point lock is used, then security is increased, but the lock becomes larger and more expensive to manufacture
Solution Approach 1:
Multiple locking elements are integrated into a single housing structure that shares common components such as the cam mechanism, slide mechanism, and bias springs. This merging approach provides multi-point security while avoiding the need for completely separate lock assemblies, thereby controlling overall size and manufacturing complexity.
Solution Approach 2:
The cam mechanism serves multiple functions: it actuates multiple locking elements, provides the locking action, and can be integrated with the handle assembly. The slide mechanism simultaneously controls the movement of locking elements and engages with the door frame. This multi-functionality reduces the total number of separate components needed.
3Adaptability or versatility
If a multi-point lock is installed in a standard opening, then retrofitting is enabled, but the lock must maintain standard size while providing enhanced security
Solution Approach 1:
The lock is designed with multiple locking elements that can be independently positioned and actuated within the standard opening. This segmentation allows the locking action to be distributed across multiple points while maintaining compatibility with the existing mortise opening dimensions, enabling retrofitting without requiring enlargement of the opening.
Solution Approach 2:
The locking elements are arranged in a configuration that utilizes the depth and width dimensions within the standard opening rather than simply extending outward. The cam mechanism and slide mechanism operate in three-dimensional space to provide multiple locking points within the constraints of the standard opening size, maintaining retrofitting compatibility while enhancing security.
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 multi-point lock provides enhanced security by engaging multiple locking elements with the door frame, maintaining standard size for easy retrofitting and reducing the risk of damage from slamming, while maintaining cost-effectiveness and compatibility with existing door structures.
Implementation Method 1
the locking element is biased outward from the housing
Data Source
AI summary
A lock includes a housing and a slide mechanism adapted to translate in the housing along a locking axis. The lock includes one or more locking elements connected to the slide mechanism. The locking elements translate along the locking axis with the slide mechanism.