Draw-Out Switch Frame Locking Mechanism With Manual Unlock Coupling
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Solution Overview
Problem
The existing chassis devices for withdrawable electrical switching devices lack optimal security and have complex, costly additional locking mechanisms that complicate actuation.
Innovation Solution
A chassis device with a mechanical transmission mechanism, a removable operating member, a main locking mechanism, and an additional locking mechanism that allows manual cooperation to unlock the transmission mechanism when the first locking member is in its open position, simplifying actuation and enhancing security.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a complex additional locking mechanism is added to the chassis device, then security is improved, but device complexity and cost increase
Solution Approach 1:
The patent combines the additional locking mechanism with the existing main locking mechanism components. The bar element serves dual purposes: it is part of the main locking mechanism (cooperating with the first locking member) and simultaneously acts as the additional locking mechanism (cooperating with the second locking member). This merging approach enhances security without adding separate complex components.
Solution Approach 2:
The bar element is designed to perform multiple functions: it cooperates with the first locking member for main locking, cooperates with the second locking member for additional locking, and can be actuated by both the operating member and the second locking member. This multi-functionality reduces the need for separate dedicated components for each locking function.
2Reliability
If a complex additional locking mechanism is added to the chassis device, then security is improved, but manufacturing cost increases
Solution Approach 1:
The patent merges the additional locking mechanism with existing components, particularly the bar element which is already part of the main locking mechanism. By reusing existing components for dual purposes, the patent avoids the need to manufacture entirely separate additional locking components, thereby reducing manufacturing costs while still providing enhanced security.
3Reliability
If the additional locking mechanism is made independent, then security is improved, but ease of operation deteriorates
Solution Approach 1:
The patent integrates the additional locking mechanism with the main locking mechanism's actuation system. The bar element can be actuated by both the operating member (through the first locking member) and directly by the second locking member. This integration allows the additional locking function to be operated through the existing operating member, maintaining ease of operation while providing enhanced security.
Data Source
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AI summary
The subject of the present invention is a frame device for a plug-in cutting electrical appliance, said device comprising a frame (C) that is able to hold a plug-in cutting electrical appliance (D) and a plug system comprising a transmission mechanism (1), a removable manipulating member (2) actuating the latter, a main locking mechanism (4) comprising a movable second locking member (4b) that is able to be moved manually between a first position blocking a first locking member (4a) in a closed position preventing the insertion of the manipulating member (2) and a second position unblocking it, and an additional locking mechanism (5). The second locking member is able to cooperate with the additional locking mechanism and, when the first locking member is in its opening position allowing the insertion of the manipulating member, is able to be moved manually into a third position by actuating, by virtue of this cooperation, the additional locking mechanism (5) so as to put it in an unlocking state.