Multipoint Lock Peripheral Assembly Counter-Rotation Prevention
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Solution Overview
Problem
Existing multipoint lock peripheral assemblies with hook-shaped sliding latches are vulnerable to intrusion through forced counter-rotation, lacking sufficient security against tampering and easy assembly, implementation, and cost-effectiveness.
Innovation Solution
A peripheral assembly for multipoint locks featuring a box-like body with an actuation rod and pivoted sliding latch, incorporating a contoured second slot and rocker arm with an eccentric projection that blocks rotation by abutting a niche, ensuring secure engagement and preventing counter-rotation attempts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a hook-shaped sliding latch is used in a peripheral assembly for multipoint locks, then security against forcing the door leaf is improved, but vulnerability to intrusion through forced counter-rotation increases
Solution Approach 1:
The patent applies preliminary anti-action by introducing a blocking element that prevents counter-rotation of the sliding latch before an intrusion attempt can succeed. The blocking element is positioned to interfere with the rotational path of the latch, creating a preliminary obstacle that stops the harmful counter-rotation action before it can compromise security.
Solution Approach 2:
The patent uses a blocking element as an intermediary component between the sliding latch and the intrusion force. This blocking element acts as a mediator that transfers and redirects the force, preventing the direct counter-rotation of the latch while maintaining the security function of the hook-shaped design.
2Reliability
If a complex peripheral assembly with multiple components is designed to prevent counter-rotation, then security against intrusion is improved, but device complexity and assembly difficulty increase
Solution Approach 1:
The patent merges the blocking function with existing components of the peripheral assembly. Rather than adding a completely separate blocking mechanism, the design integrates the counter-rotation prevention into the existing structure of the sliding latch and box-like body, reducing the total number of components while maintaining security.
Solution Approach 2:
The patent applies multi-functionality by designing components that serve multiple purposes. The blocking element not only prevents counter-rotation but also works in conjunction with the sliding latch's primary locking function, creating a unified system where components perform both their primary and secondary functions without requiring additional separate elements.
3Reliability
If additional components are added to prevent counter-rotation, then security is improved, but manufacturing cost increases
Solution Approach 1:
The patent segments the security function into distinct operational phases: the sliding latch provides the primary locking function, while the blocking element provides the secondary counter-rotation prevention. This segmentation allows each component to be optimized for its specific function, reducing overall manufacturing complexity and cost compared to a fully integrated complex mechanism.
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A peripheral assembly (1) for multipoint locks which comprises a box-like body (2) for accommodating at least one actuation rod (3) for at least one sliding latch (4) which is pivoted on an inner wall of the box-like body (2) and can move between an extracted configuration and a retracted configuration with respect to the box-like body (2) as a result of corresponding translations of the rod (3) along a path inside the box-like body (2) which is defined by at least one first slot (5) thereof within which at least one first plug (6) is engaged which is integral with an inner wall of the box-like body (2); the actuation rod (3) comprises at least one contoured second slot (7) for the slideable accommodation of a peg (8) for pivoting the at least one sliding latch (4); the peg (8) is provided with an eccentric projection (9) which can be accommodated, in the configuration of total extraction of the sliding latch (4), in a respective recess (10) of the second slot (7); at least one rocker arm (11), which is pivoted on the plug (6) which is integral with the inner wall of the box-like body (2), comprises an end tab ( 12) which is contoured and adapted to abut on a niche (13) of the rim of the sliding latch (4), of shape and dimensions substantially complementary to those of the tab (12), the insertion of the tab (12) into the niche (13) blocking the rotation of the sliding latch (4); a projection (14) of the rod (3), facing and protruding toward the inner wall of the box-like body (2) to which the plug (6) is coupled, is aligned with a portion of the at least one rocker arm ( 11); a translation of the rod (3) causes the abutment of the projection ( 14) on the portion of the rocker arm (11), with forcing of the rotation of the rocker arm (11), with respect to the plug (6), away from the niche 13 of the slidin latch 4.