Window Lock Assembly with Segmented Recesses for Intermediate Sash Positioning
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Solution Overview
Problem
Traditional window lock systems only allow for locking the second sash at fully closed or open positions, failing to provide secure intermediate locking options, which can compromise security and ventilation control.
Innovation Solution
A lock assembly with an elongate strip and a lock member that includes biasing members and couplers, allowing the second sash to be locked at various intermediate positions by moving along the strip, and alternative embodiments using suction cups and levers to create a partial vacuum for secure positioning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a traditional lock system is used to lock the second sash, then the sash can be locked at fully closed or open positions, but it cannot be locked at intermediate positions, compromising security and ventilation control
Solution Approach 1:
The locking system is segmented into multiple discrete locking positions along the elongate strip, with each position represented by a separate recess. The lock member can engage with any of these recesses to provide secure locking at intermediate positions, transforming a single-position lock into a multi-position locking system without requiring a completely new complex mechanism
Solution Approach 2:
The biasing member automatically biases the coupler toward engagement with the recesses on the elongate strip. When the lock member is moved to a desired position, the biasing member ensures automatic engagement with the nearest recess, providing self-service locking without requiring manual intervention to secure each position
2Adaptability or versatility
If a lock member with biasing member and coupler is used to enable intermediate positioning, then multiple locking positions are achieved, but the device complexity increases
Solution Approach 1:
The lock member combines multiple functional elements into a single integrated component: the biasing member provides automatic engagement force, the coupler interfaces with the recesses to secure positioning, and the lock member body connects to the second sash. This merging of functions into one component achieves intermediate positioning capability without requiring separate mechanisms for each function
Solution Approach 2:
The lock member is designed as a multi-functional component that can engage with any of the multiple recesses along the elongate strip, providing universal locking capability across all intermediate positions. The same lock member structure serves all positioning needs, eliminating the need for different locking mechanisms for different positions
3Reliability
If suction cups are used to create partial vacuum for securing the sash, then secure positioning is achieved, but the mechanism complexity increases with levers and linkage
Solution Approach 1:
The lock assembly uses suction cups that create a partial vacuum against the glass pane to secure the sash in position. This pneumatic mechanism provides reliable holding force without requiring complex mechanical interlocking mechanisms, leveraging atmospheric pressure to maintain the locked state
Solution Approach 2:
The traditional mechanical locking mechanism is replaced with a pneumatic suction cup system. Instead of using mechanical teeth, springs, and latches to secure the sash, the invention uses atmospheric pressure differential created by the suction cup to hold the sash firmly in place, simplifying the overall mechanical complexity
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
Enables secure locking of the second sash at multiple intermediate positions, balancing ventilation and security by preventing unauthorized access while allowing airflow, and allowing flexible adjustment of the sash position.
Implementation Method 1
a suction cup coupled to the engagement member and configured to create a partial vacuum on the glass pane of the first sash
Data Source
AI summary
A lock assembly is provided for a window having a first sash and a second sash. The lock assembly comprises an elongate strip configured to be coupled to the first sash. The elongate strip has a plurality of recesses defined along a length of the elongate strip. The lock assembly also includes a lock member configured to be coupled to the second sash and operable to move along the length of the elongate strip. The lock member includes a biasing member and a coupler biased in a direction of the elongate strip by the biasing member. The coupler is configured to enter each of the plurality of recesses to selectively lock the lock member to the elongate strip.