Switchboard Lever Interlock for Dual-Source Safety Locking
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Solution Overview
Problem
Existing locking devices for electrical switchboards are complex, bulky, and difficult to use, increasing the risk of accidents and compromising safety in domestic or commercial environments, as they often require modification of existing switching apparatuses and are not intuitive for non-expert users.
Innovation Solution
A modular locking device with a housing and a rotating locking member that blocks control levers of two switching apparatuses, allowing only one to be in a closed state, featuring a simple and intuitive design that can be easily integrated with existing systems without architectural modifications, and includes sensors for position detection and a locking tool interface.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a locking system is implemented to prevent simultaneous connection of multiple electricity sources, then safety is improved, but the device becomes bulky and complex to manufacture and install
Solution Approach 1:
The locking device is divided into separate modular components: a locking member with distinct functional edges (blocking edge, first contact edge, second contact edge) that can independently interact with different switching apparatuses. This segmentation allows the locking function to be implemented without requiring a complex integrated system, thereby improving safety while reducing overall device complexity.
Solution Approach 2:
The locking member is designed to perform multiple functions with a single component: it can block the first switching apparatus using its blocking edge, allow the second switching apparatus to close using its second contact edge, and vice versa. This multi-functionality eliminates the need for separate locking mechanisms for each switching apparatus, reducing device complexity while maintaining safety.
2Reliability
If a locking system is implemented to prevent simultaneous connection of multiple electricity sources, then safety is improved, but the device is complicated to install and select
Solution Approach 1:
The locking device is designed as a separate modular unit that can be independently installed between existing switching apparatuses without requiring modification of the switching apparatuses themselves. This segmentation simplifies installation procedures while maintaining the safety locking function.
Solution Approach 2:
The locking device serves as an intermediary component positioned between the first and second switching apparatuses. It mediates the interaction between these apparatuses through its contact edges, enabling the locking function without requiring direct integration into the existing switching apparatus structures, thereby simplifying installation.
3Reliability
If a locking system is implemented to prevent simultaneous connection of multiple electricity sources, then safety is improved, but the device is not simple to use and increases the risk of accidents
Solution Approach 1:
The locking member features asymmetric edge design with distinct functional edges (blocking edge, first contact edge, second contact edge) that create intuitive directional interaction with the switching apparatuses. This asymmetry provides clear visual and tactile cues to users about the correct operation sequence, making the device easy to use while maintaining safety.
Solution Approach 2:
Instead of requiring users to understand complex locking mechanisms, the design allows the locking member to passively enforce safety through its geometric configuration. The blocking edge automatically prevents simultaneous closure, while the contact edges guide the operation, inverting the complexity from the user side to the mechanism side.
Data Source
AI summary
A locking device includes:a housing intended to be mounted on an electrical switchboard between a first switching apparatus and a second switching apparatus, each of the switching apparatuses having a control lever able to move between a lower position, corresponding to an open state, and an upper position, corresponding to a closed state,a locking member able to move in rotation between:a first locking position, in which the locking member blocks the control lever of the first switching apparatus in the open position, anda second locking position, in which the locking member blocks the control lever of the second switching apparatus in the open position.