Window Latch Bolt Dynamics for Sash Pivoting Control
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Solution Overview
Problem
Existing window latch mechanisms for double-hung windows do not effectively allow for selective pivoting and sliding motions of sashes relative to the frame, limiting versatility and ease of access.
Innovation Solution
A window latch design featuring a housing with a bolt that reciprocates between extended and retracted positions, allowing engagement with the window frame to prevent pivoting while enabling vertical sliding, and disengagement for pivoting access, utilizing a bolt with a front and rear portion that extends through apertures in the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional latch mechanism is used to prevent sash pivoting, then security and closure are maintained, but accessibility and ventilation options are limited
Solution Approach 1:
The latch mechanism transitions from a static locked state to a dynamic system that can pivot between engaged and disengaged positions. The bolt can be manually actuated to move between extending (locked) and retracting (unlocked) positions, allowing the sash to dynamically switch between secured and accessible states, thereby resolving the contradiction between security and accessibility.
Solution Approach 2:
The latch bolt is divided into distinct functional segments: a front portion that engages the window frame for security, and a rear portion that can be manually actuated to disengage. This segmentation allows independent control of the locking function while maintaining the ability to access the sash interior, balancing secure closure with ease of operation.
2Ease of operation
If the latch bolt is extended to engage the window frame, then the sash is secured against pivoting, but the ability to access the sash interior is blocked
Solution Approach 1:
The latch mechanism provides dynamic control over the pivoting function. The bolt can be extended to prevent pivoting when security is needed, and retracted to allow pivoting access when needed. This dynamic states allows the system to adapt between pivoting prevention and pivoting enablement based on operational requirements.
Solution Approach 2:
The latch mechanism is designed to be manually actuated by the user through a simple pulling motion on the latch body. This self-service mechanism allows the user to easily transition the bolt between engaged and disengaged positions without requiring external tools or complex operation, facilitating easy access to the sash interior while maintaining security when needed.
3Adaptability or versatility
If a simple latch mechanism is used, then the structure remains straightforward, but the ability to control both pivoting and sliding motions is limited
Solution Approach 1:
The latch mechanism serves multiple functions: it prevents sash pivoting when engaged, allows manual actuation for access, and maintains compatibility with the existing sliding window mechanism. By integrating these multiple functions into a single compact mechanism, the design achieves enhanced motion control versatility without requiring entirely separate systems for each function.
Data Source
AI summary
A latch for use in a window comprising a bottom sash mounted in a window frame, the latch comprising a housing comprising a top wall, a bottom wall, a pair of opposed sidewalls and a rear wall. A top edge of the rear wall and a rear edge of each sidewall define a rear aperture. A front edge of the top wall, the bottom wall and each of the sidewalls defines a front aperture, the front aperture and the rear aperture opening into a bolt cavity defined by the housing. A bolt is slidably received by the housing, the bolt comprising a body with a front portion and a rear portion. The body is slidably received in the bolt cavity between a first position in which the front portion of the bolt is extended outwardly through the front aperture and the rear portion of the body engages an outer surface of the housing, and a second position in which the rear portion is disengaged from the housing. The rear portion of the bolt extends outwardly through the rear aperture in both the first and second positions.