Door Lock-Actuating Linkage for Consistent Engagement
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Solution Overview
Problem
Existing door locking mechanisms often fail to ensure a consistent locked state when the door is closed, leading to potential security issues and user confusion regarding the locking status.
Innovation Solution
A lock-actuating linkage system that utilizes a pivotally-mounted lever arm or linkages to apply a force to the locking element, ensuring it transitions to a locked state during the final stages of door closure, with mechanical motion amplification and geometric or frictional locking mechanisms to secure the door.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional locking mechanism is used, then the door can be locked, but the locking element may not consistently engage in the locked state when the door is closed
Solution Approach 1:
The linkage mechanism is designed to automatically actuate the locking element during the door closing motion itself, without requiring separate manual intervention. The closing motion preliminarily positions the locking element for engagement, ensuring consistent locked state achievement.
Solution Approach 2:
The door closing motion itself provides the actuating force for the locking mechanism through the linkage. The system uses its own operational motion (door closing) to automatically engage the lock, eliminating the need for external power sources or additional actuation steps.
2Force
If the locking element is positioned far from the hinge axis, then it provides better leverage for locking, but it requires a longer door closing distance to engage
Solution Approach 1:
The linkage mechanism introduces a dimensional transformation by converting the linear door closing motion into rotational motion of the locking element through a pivot point. This allows the locking element to achieve engagement at an optimized position without requiring excessive closing distance.
Solution Approach 2:
The pivotally mounted linkage acts as an intermediary between the door closing motion and the locking element actuation. It mediates the force transmission and motion conversion, allowing the locking element to be positioned for optimal leverage while maintaining a reasonable closing distance.
3Reliability
If the locking element engages early in the closing motion, then the door is secured sooner, but the panel cannot fully close against the strike jamb
Solution Approach 1:
The linkage mechanism is designed with dynamic geometry that changes during the closing motion. The relative positions and angles of the linkage components allow the locking element to engage at the precise moment when the door reaches its fully closed position, balancing early security with complete closure.
Solution Approach 2:
The mechanism utilizes changes in geometric parameters (angles, distances) of the linkage components during door closure. These parameter changes enable the locking element to be actuated at the optimal point in the closing sequence, ensuring both security and complete panel engagement with the strike jamb.
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 system reliably engages the locking element in a locked state upon closure, providing immediate visual confirmation of the door's locked status and preventing the door from fully closing unless properly locked, enhancing security and user assurance.
Implementation Method 1
the linkage being configured to direct at least part of the input force to generate an output force applied to the locking element
Implementation Method 2
the linkage comprises at least one pivotally-mounted link
Implementation Method 3
the pivotally-mounted link is mounted on a spring-loaded pivot axis
Implementation Method 4
geometrical or frictional locking between the panel and the locking element
Implementation Method 5
geometrical or frictional locking between the panel and the locking element
Data Source
AI summary
A door or window arrangement has a panel movable relative to an opening bounded by a frame so as to close against a strike jamb or move away from it. A locking element moves between a locked state in which it engages between the panel and the strike jamb to prevent separation of the panel from the strike jamb and a released state in which the panel can be separated from the strike jamb. A linkage is displaced by a terminal part of a closing motion of the panel so that completion of the closing motion can only occur when the locking element assumes its locked state. Preferably, the linkage is deployed so that force applied to displace the panel through the terminal part of the closing motion results in a force applied to the locking element to displace it towards its locked state.