Window Locking Tongue Mechanism for Sash Drop Compensation
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Solution Overview
Problem
Conventional automatic locking mechanisms for windows fail to lock properly due to the downward movement of the locking point caused by window sash tilting or dropping, resulting in incomplete locking.
Innovation Solution
An automatic locking device with a locking tongue and a force assisting lever that compensates for the downward movement of the locking point by rotating and sliding the locking tongue, ensuring proper alignment with a guiding surface for secure locking, and an unlocking lever for controlled unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional automatic locking mechanism is used where the locking point pushes against the guiding surface of the locking tongue, then the locking tongue can elastically reset to lock the locking point, but the locking fails when the locking point moves downward due to window sash tilting or dropping
Solution Approach 1:
The locking tongue is designed to perform both sliding and rotating movements instead of only sliding. The rotation capability allows the locking tongue to adapt to downward displacement of the locking point, maintaining contact with the guiding surface and ensuring reliable locking even when the window sash tilts or drops
Solution Approach 2:
The locking mechanism transitions from a single-dimensional sliding motion to a two-dimensional motion combining sliding and rotating. This additional rotational degree of freedom enables the locking tongue to compensate for vertical displacement of the locking point, solving the adaptability problem
2Device complexity
If the locking point position is fixed on the window sash transmission rod, then the structure is simple, but the locking point moves down with tilting or dropping of the window sash causing locking failure
Solution Approach 1:
The locking tongue is designed with rotational capability around a fulcrum point, transforming it from a statically positioned component to a dynamically adjustable one. This allows the locking tongue to rotate and maintain proper alignment with the guiding surface even when the locking point displaces vertically due to window sash tilting or dropping
3Device complexity
If the locking tongue only slides horizontally to lock the locking point, then the structure is simple, but it cannot compensate for vertical displacement of the locking point
Solution Approach 1:
The locking tongue is designed with rotational capability around a fulcrum point, transforming it from a statically positioned component to a dynamically adjustable one. This allows the locking tongue to rotate and maintain proper alignment with the guiding surface even when the locking point displaces vertically due to window sash tilting or dropping
Solution Approach 2:
The locking mechanism transitions from a single-dimensional sliding motion to a two-dimensional motion combining sliding and rotating. This additional rotational degree of freedom enables the locking tongue to compensate for vertical displacement of the locking point, solving the adaptability problem
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
Ensures reliable automatic locking and unlocking of the window sash even when the locking point is displaced, enhancing safety and user experience with a simple and practical structure.
Implementation Method 1
The locking tongue is provided with an inclined guiding surface and an engaging surface away from the guiding surface. The locking point pushes against the guiding surface to enable the locking tongue to slide relative to the locking base while moving along a locking path. The locking tongue is elastically reset when the locking point crosses the guiding surface and locking the locking point through the engaging surface.
Implementation Method 2
The automatic locking device further includes a force assisting lever rotatably mounted to the locking tongue. The force assisting lever is provided with a first force assisting surface and a second force assisting surface. The first force assisting surface is located outside and below of the guiding surface to abut against the locking point in a locking process of a downward movement of locking point, when the locking point pushes against the first force assisting surface to enable the force assisting lever to rotate, the second force assisting surface abuts against a fulcrum fixed on the locking base and enable the locking tongue to slide downward until the locking point is in contact with the guiding surface, when the locking point crosses the guiding surface and the locking tongue is elastically reset, the second force assisting surface abuts against again the fulcrum and enable the force assisting lever to rotate reversely and reset.
Data Source
AI summary
An automatic locking device is provided. The automatic locking device includes a locking base and a locking tongue. The locking tongue is slidably mounted on the locking base in an elastically resettable manner. The automatic locking device further includes a force assisting lever. The force assisting lever is rotatably mounted to the locking tongue. The force assisting lever is provided with a first force assisting surface and a second force assisting surface. The automatic locking device is configured to lock the locking point normally and automatically when the locking point moves down.