Window Fitting Locking Element Transverse Drive Mechanism
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Solution Overview
Problem
Existing window and door fittings require separate mechanisms for longitudinal and transverse movement of the locking element, leading to increased complexity and rebate clearance, while aiming for secure and efficient locking.
Innovation Solution
A fitting design where the locking element is movable transversely relative to the drive rod, allowing it to be extended and retracted simply, with a mechanism converting longitudinal drive rod movement into transverse locking element movement, eliminating the need for separate mechanisms and reducing rebate clearance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking element is connected to the connecting rod in a stationary manner, then the locking element can be securely driven, but separate mechanisms are required for longitudinal and transverse displacement, increasing device complexity
Solution Approach 1:
The locking element is made movable relative to the drive rod through a transverse movement mechanism. The drive rod can move the locking element longitudinally along its axis, while a separate transverse movement mechanism enables the locking element to move perpendicular to the drive rod's movement direction. This dynamic configuration allows the locking element to achieve both longitudinal extension and transverse positioning without requiring the drive rod itself to perform complex two-directional movement, thus reducing overall mechanism complexity while maintaining secure locking capability.
2Reliability
If the locking element is extended through the faceplate for secure locking, then locking security is improved, but the locking element protrudes and impedes sash movement, requiring larger rebate clearance
Solution Approach 1:
The locking element is designed to be movable relative to the drive rod, enabling it to be retracted into the fitting or frame profile when locking is not required. This dynamic retraction capability allows the locking element to minimize protrusion during sash movement, reducing the required rebate clearance. The locking element can be extended through the faceplate when secure locking is needed, and retracted when the sash needs to move freely, thus resolving the contradiction between locking security and ease of sash operation.
3Device complexity
If the locking element can only be moved in the longitudinal direction of the fitting, then the drive rod mechanism is simplified, but the locking element cannot assume tilted positions necessary for window tilting function
Solution Approach 1:
The locking element is equipped with a transverse movement mechanism that enables it to move perpendicular to the drive rod's movement direction. This additional degree of freedom allows the locking element to assume tilted positions in addition to the standard locked and retracted positions. The drive rod itself maintains its simple longitudinal movement function, while the locking element's ability to move transversely relative to the drive rod provides the necessary adaptability for window tilting operations, thus resolving the contradiction between mechanism simplicity and functional versatility.
Data Source
Figure 1~3a
Figure 3b~5a
Figure 5b~7a
AI summary
The fitting (10) has a face plate rail (11) comprising a passage (13) for receiving a bolting element (16) e.g. rolling pin, and a connecting rod (12) arranged in a longitudinal movable manner against the face plate rail. The bolting element is driven by the connecting rod. The connecting rod is movable between a locking position and a releasing position. The bolting element is driven via the passage of the face plate rail in the locking position. The bolting element is movable transverse to a movement direction relative to the connecting rod.