Window Lock Trigger Bolt Mechanism for Varying Sash Spacing

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Solution Overview

Problem

Traditional window lock mechanisms are ineffective when window sashes are not at a specific distance apart, leading to binding or failure to lock, and are prone to damage over time, requiring frequent adjustments and potential replacement.

Innovation Solution

A window lock mechanism featuring a rotatable trigger and movable bolt with clips and stops, allowing for automatic locking and unlocking regardless of sash spacing, using a beam and pivot points to facilitate movement between locked and unlocked positions.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If a traditional lock mechanism is used, then the lock can function when sashes are at a specific distance, but the lock becomes ineffective when sashes are too close or too far apart

Engineering Contradiction:

Improveadaptability to varying sash spacingVSAvoidreliability of locking function

Core Design Contradiction:

Adaptability or versatilityVSReliability

Solution Approach 1:

The lock mechanism employs dynamic components including a rotatable trigger that can rotate about an axis, a bolt that moves between locked and unlocked positions, and a beam that cantilevers from the bolt. These dynamic elements allow the mechanism to adapt to varying sash spacings while maintaining reliable locking function across different positions.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The mechanism changes its operational parameters through the rotation of the trigger and movement of the bolt, allowing it to function effectively whether sashes are close together or far apart. The trigger's rotation and the bolt's linear movement enable the lock to accommodate a range of spacing conditions without failure.

Inventive Principle:

Principle #35Parameter changes

2Ease of operation

If the sashes are forcibly pushed together to achieve proper spacing, then the lock mechanism can function, but stress is placed upon the frame and glass panes

Engineering Contradiction:

Improveease of lock operationVSAvoidstrength of frame and glass

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The lock mechanism is designed to self-adjust and self-lock without requiring external force on the sashes. The rotatable trigger and movable bolt components automatically engage and disengage based on the natural spacing between sashes, eliminating the need for forcible pushing while maintaining operational ease.

Inventive Principle:

Principle #25Self-service

3Device complexity

If traditional lock mechanisms are used, then the lock structure is simple, but the lock binds or interferes with itself when sashes are too close

Engineering Contradiction:

Improvecomplexity of lock structureVSAvoidease of locking operation

Core Design Contradiction:

Device complexityVSEase of operation

Solution Approach 1:

The lock mechanism is segmented into distinct functional components: a trigger assembly with rotation capability, a bolt with linear movement, and a beam connecting them. This segmentation allows each component to perform its specific function independently, preventing binding and interference while maintaining overall structural simplicity.

Inventive Principle:

Principle #1Segmentation

Data Source

PatentUS9260893B1Window lock

Publication Date: 2016.02.16 ASSA ABLOY FENESTRATION LLC

AI summary

The invention relates to a window lock having a trigger and a bolt, the trigger being rotatable about an axis of rotation and the bolt being movable between a locked position, a first unlocked position and a second unlocked position. The bolt also includes a clip that engages first and second stops. The trigger rotates about the axis for engaging and disengaging the clip with the first and second stops. The first and second stops and the clip are all located on the same side of the axis of the trigger.