Lock Cylinder Locking Cam Pivotable Ring Section
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Solution Overview
Problem
Existing door and window locks with additional security rosettes, especially those with elongated structures, lack security as they can be easily mounted from the outside, and existing designs are not efficient in bolt ejection and operation convenience.
Innovation Solution
The design incorporates an opening between the cylinder locking cam and the locking element, a pivotable ring section locking lever, and a tumbler with a spring-activated push-back mechanism, allowing for efficient bolt ejection with less than a full turn of the key and enabling secure rosette mounting from the inside without obstructing the lock mechanism.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an opening is formed through the housing for mounting security rosettes, then security is improved by allowing rosette mounting from the inside, but the lock mechanism may be obstructed by the opening structure
Solution Approach 1:
The locking lever is divided into two functional sections: a ring section that pivots around the cylinder to provide stop surfaces, and a deflecting lever section with a concave bend that couples to the locking element. This segmentation allows the lever to navigate around the opening while maintaining locking functionality.
Solution Approach 2:
The deflecting lever incorporates a concavely bent section that curves in the direction of the opening, creating a recess on the edge that aligns with the opening in the unlocked position. This curved geometry allows the lever to clear the opening path while maintaining structural integrity and force transmission.
2Ease of operation
If a locking lever is provided to prevent obstruction of the opening, then the opening remains freely passable, but the device complexity increases
Solution Approach 1:
The locking lever performs multiple functions simultaneously: it provides stop surfaces for the cylinder locking cam, couples to the locking element for force transmission, and clears the opening path through its concave geometry. This multi-functionality reduces the need for additional separate components.
Solution Approach 2:
The ring section and deflecting lever are merged into a single locking lever component, where the ring section provides the pivoting mechanism and stop surfaces, while the deflecting lever section provides the concave geometry for clearing the opening and couples to the locking element.
3Productivity
If the bolt extension requires a full turn of the key, then the locking mechanism is simple, but the operating convenience and efficiency are reduced
Solution Approach 1:
The locking lever is designed to pivot dynamically around the cylinder during bolt extension, with the ring section rotating and the deflecting lever deflecting to convert the rotational motion of the cylinder locking cam into efficient linear motion of the bolt element, achieving full extension with less than one turn.
4Ease of manufacture
If a simple mechanical structure is used to keep costs low, then manufacturing cost is reduced, but the functionality for secure rosette mounting and efficient bolt extension is limited
Solution Approach 1:
The locking lever has different local geometries optimized for different functions: the ring section with pivot point and stop surfaces for cam interaction, and the deflecting lever section with concave bend for opening clearance and locking element coupling. This localized optimization achieves multiple functions without requiring a completely complex redesign.
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
This solution enhances security by allowing secure rosette mounting from the inside, improves bolt ejection efficiency, and maintains a simple and cost-effective lock mechanism with high operating convenience.
Implementation Method 1
a tumbler with a spring-activated push-back mechanism, allowing for efficient bolt ejection with less than a full turn of the key
Data Source
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AI summary
The invention relates to a lock for a door or window comprising a housing (1), a bolt element (2) movable between an unlocked position and a locked position, and an actuated cylinder locking cam (3) which, in conjunction with a locking lever (4), serves to displace the bolt element (2). In the unlocked position, an opening (6) through the housing (1) is formed between the cylinder locking cam (3) and the rear end section (5) of the bolt element (2). The locking lever (4) is designed at one end section as an annular section (7) which is pivotably mounted around the cylinder (8) of the cylinder locking cam (3), the annular section (7) having stop surfaces (9) for the cylinder locking cam (3) at its respective free ends.The end section facing away from the ring section (7) is designed as a deflecting lever (10) coupled to the locking element (2), which has a section bent concavely in the direction of the opening (6) or a recess on the edge, so that the opening (6) in the unlocking position of the lock is aligned with the groove of the concave section or with the recess on the edge and the opening (6) is thus freely passable in every lock position.