Rebated Door Lock With Universal Cursor-Element
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Solution Overview
Problem
Existing locks for rebated doors are structurally and geometrically distinct based on whether they include a bolt or not, leading to increased manufacturing complexity, cost, and difficulty in modifying one type to fit the other, as they require different component geometries and layouts.
Innovation Solution
A lock design featuring a cursor-element that allows optional bolt fitting, with a reduced number of mechanical components, enabling configuration without or with a bolt, and utilizing a single cursor-element to couple the latch, bolt, and key-locking member for unified operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a lock is designed with both latch and bolt as separate functional components, then safety and privacy protection are improved, but device complexity and manufacturing cost increase
Solution Approach 1:
The patent combines the latch and bolt into a single integrated closing element that performs both functions. The closing element can be positioned in different locations (first position for latch function, second position for bolt function) to provide both security levels without requiring separate mechanical components, thereby reducing structural complexity while maintaining safety.
Solution Approach 2:
The closing element is designed as a multi-functional component that can operate in different modes. When positioned in the first position, it provides latch-based closure; when positioned in the second position, it provides bolt-based closure. This universal design allows a single component to replace what would traditionally require two separate components.
2Adaptability or versatility
If two different types of locks (with latch only, with latch and bolt) are produced to meet different market needs, then adaptability to different requirements is improved, but manufacturing complexity and cost increase
Solution Approach 1:
The lock is designed with a universal closing element that can provide different security levels (latch-only or latch-with-bolt) depending on its position. This allows a single lock design to serve multiple market segments, eliminating the need to manufacture and stock different types of locks for different applications.
Solution Approach 2:
The closing element's functionality is made dynamic rather than static. It can be repositioned between different locations to change its function from latch to bolt, allowing the lock to adapt to different security requirements without requiring different physical lock units.
3Adaptability or versatility
If the closing element is movable between different positions, then versatility and adaptability are improved, but device complexity increases
Solution Approach 1:
The patent merges the positioning mechanism with the closing element itself. The closing element is integrated with the actuating mechanism, allowing it to be moved between positions through a single actuation action rather than requiring separate positioning and closing mechanisms.
Data Source
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AI summary
A lock for a door of the rebated type, comprising a containing box body (2; 102), suitable for being housed in a cavity of the rebated door; a latch (3; 3'; 3'') that is movable between an extracted position (E) and a retracted position (R) in the box body (2; 102); driving means (4; 104; 204) movable, by means of a control handle, along an opening direction (DA) to move the latch (3; 3'; 3'') from the extracted position (E) to the retracted position (R). The driving means (4; 104; 204) are movable, by a key-locking-member (5), along a locking direction (DB) opposite to the opening direction (DA), to reach a disengaged position (PD) in which the driving means (4; 104; 204) are not engageable by the control handle, thus preventing the driving of the latch (3; 3'; 3''); the driving means (4; 104; 204) comprise locking means (7A, 7B) shaped for blocking the latch (3; 3'; 3'') in the extracted position (E), preventing forced movement thereof from the outside to the retracted position (R), when the driving means (4; 104; 204) are in the disengaged position (PD) unbound from the control handle. The driving means are defined by a cursor-element (4; 104; 204) that is geometrically configured to enable to fit into the box body (2; 102) an optional bolt (6). The cursor-element (4; 104; 204) is provided with protrusion means (20) for driving and locking the optional bolt (6).