Mortise Lock Control Latch Carrier for Rotating Main Latch
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Solution Overview
Problem
Existing mortise locks with rotatable main latches are hindered by the latch being blocked when rotated, preventing the rotation of the latch inside the lock case, which limits the door's operational flexibility and security.
Innovation Solution
A mortise lock design featuring a retractable main latch with a control latch assembly that allows the main latch to be rotated 180° by moving the control latch carrier through specific positions, ensuring the blocking element remains in a release position during rotation, enabling smooth latch rotation without obstruction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the main latch is designed as a rotatable latch for left and right stop, then the door can be operated for left or right opening, but the main latch cannot be rotated on the latch lock as it would be blocked
Solution Approach 1:
The blocking element is designed to change its position dynamically between a blocking position and a release position. During normal operation, it blocks the main latch. During rotation, it moves to the release position to allow rotation, then returns to blocking position. This dynamic behavior enables the main latch to rotate without permanent structural changes.
Solution Approach 2:
The control latch carrier is moved to the over-travel position beforehand to actuate the blocking element into the release position before the main latch rotation occurs. This preliminary action ensures the blocking element is already in the correct position to allow rotation, preventing any blocking during the rotation process.
2Reliability
If the blocking element is used to block the main latch from being pushed back, then security is improved, but the main latch rotation is prevented
Solution Approach 1:
The blocking element transitions between blocking and non-blocking states based on the rotation requirement. The control latch carrier detects when rotation is needed and moves the blocking element accordingly, maintaining security during normal operation while enabling rotation when required.
Solution Approach 2:
The control latch carrier acts as an intermediary between the main latch and the blocking element. It receives the rotation command, moves to the over-travel position, and actuates the blocking element to the release position, coordinating the interaction between these components to enable rotation while maintaining security.
3Ease of operation
If the control latch carrier is moved to the over-travel position to release the blocking element, then latch rotation is enabled, but the control latch moves beyond its normal range
Solution Approach 1:
The control latch carrier movement is extended into a new dimensional space by adding the over-travel position beyond the normal extended and retracted positions. This additional movement range in the same linear dimension enables the blocking element to be actuated to the release position, allowing rotation without requiring complex additional mechanisms.
Data Source
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AI summary
The invention relates to a lock (1), in particular a deadbolt lock, comprising a retractable main latch (4), a control latch assembly (10) with a control latch carrier (14) and a control latch (11) arranged thereon, wherein the control latch carrier (14) is movable into the following three positions: an extension position with the control latch (11) extended, a retraction position with the control latch (11) retracted, and an overtravel position, wherein the retraction position is formed along the direction of movement of the control latch carrier (14) between the extension position and the overtravel position, and a locking element (20) which, in a locking position, prevents the main latch (4) from being retracted and, in a release position, releases the main latch (4), wherein the control latch carrier (14) is arranged to actuate the locking element (20), such that in the extension position the locking element (20) assumes the release position.In the insertion position, the locking element (20) can assume the locking position, and in the overstroke position, the locking element (20) assumes the release position.