Double Hung Sash Lock with Tilt Release Button
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Solution Overview
Problem
Existing combined sash and tilt lock mechanisms often suffer from unreliable operation, accidental tilting, and poor adjustability, making them difficult to use effectively for window cleaning and maintenance.
Innovation Solution
A combined sash and tilt lock mechanism is designed with a superimposed linear relationship between the sash lock and tilt lock, featuring a separate button for tilt lock release to prevent accidental disengagement, and a cam-style lock lever for secure vertical movement and tilting control, utilizing a minimal number of parts for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single lever is used to control both sash locking and tilt locking, then device complexity is reduced, but reliability deteriorates due to possible accidental tilting and inconsistent operation
Solution Approach 1:
The lock mechanism is divided into two independent control elements: a sash lock lever and a tilt lock release button. The sash lock lever controls the cam lock for vertical movement, while the tilt lock release button separately controls the tilt latch. This segmentation prevents accidental tilting when unlocking the sash, as the tilt lock requires intentional button depression rather than being triggered by lever movement alone.
2Ease of operation
If traditional tilt locks are mounted on upper rails, then ease of operation is improved, but device complexity increases due to multiple components and poor adjustability
Solution Approach 1:
The tilt lock mechanism is merged with the sash lock housing, sharing common mounting structure and spatial relationship. The tilt lock release button is integrated into the same housing as the sash lock lever, creating a compact combined unit that reduces overall component count while maintaining separate control functions. This merging eliminates the need for additional mounting hardware and simplifies adjustment procedures.
Data Source
AI summary
A combination tilt/sash lock for mounting to a window sash rail, the combination including a sash lock and tilt lock being mounted in linear relationship to each other; the tilt lock having a latch element latching to a window frame that is manually movable within a tilt lock housing between a latched position and an unlatched position; the sash lock having a rotatable cam movable by rotating a locking lever between a locked position and an unlocked position; the sash lock locking lever being located in a superimposed linear relationship to and blocking manual movement of the tilt lock in the locked position and allowing movement of the latch element in the unlatched position; and the tilt lock mechanism being movable from a latched position to a disengaged position.