Window Locking Apparatus with Swingable Half-Lock Striker
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Solution Overview
Problem
Conventional locking apparatuses for openable windows in cabins obstruct rear vision when the window is fully closed due to the positioning of the locking arm along the upper face of the frame.
Innovation Solution
A locking apparatus with a swingable lock main body, a full-lock striker, and a half-lock striker positioned on opposite sides of the beam, allowing the half-lock striker to be on the second face side when the window is fully closed, reducing the number of components on the first face side and improving vision, with a compact design that does not obstruct space.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking arm extends along the upper face of the lower frame when the window is fully closed, then the locking function is achieved, but the rear vision is obstructed
Solution Approach 1:
The locking arm is divided into two functional parts: a full-lock striker at the base end for fully-closed state locking, and a half-lock striker at the front end for half-closed state locking. This segmentation allows each striker to be positioned independently, enabling the half-lock striker to be located on the second face side when fully closed, thus reducing vision obstruction while maintaining locking reliability
Solution Approach 2:
The locking mechanism transitions from a single-plane configuration to a multi-dimensional arrangement by positioning strikers on opposite faces of the frame. The half-lock striker is disposed on the second face side when fully closed, utilizing the third dimension (depth/thickness of the frame) to resolve the contradiction between locking function and vision clarity
2Device complexity
If the locking arm is positioned on the upper side of the lower frame throughout its full length, then the locking mechanism is simplified, but the vision through the window is obstructed
Solution Approach 1:
The locking arm is segmented into two distinct strikers positioned at different locations and orientations. The full-lock striker remains on the first face side for simplified mounting, while the half-lock striker extends to the second face side, achieving vision improvement without significantly increasing overall mechanism complexity
Solution Approach 2:
Different portions of the locking mechanism have different spatial configurations optimized for their specific functions. The full-lock striker is positioned for structural simplicity, while the half-lock striker is positioned for vision optimization, allowing each local region to have the quality most suited to its purpose
Data Source
AI summary
A locking apparatus for an openable window disposed in a cabin provided with a beam that has a first face and a second face includes a lock main body that is attached to the first face so as to be swingable between a closed position and a half-closed position, and a half-lock striker that is disposed on the lock main body. The half-lock striker is engageable with an operation piece provided on the openable window when the lock main body is at the half-closed position. The half-lock striker is positioned on a second face side of the beam at the closed position.