Integrated Locking Mechanism for Installation Switchgear
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Solution Overview
Problem
Existing installation switching devices require additional external or internal components for secure locking, leading to increased production complexity and potential security gaps, as they often rely on external locking devices or complex internal mechanisms to prevent unauthorized switching.
Innovation Solution
A locking device is integrated within the installation switching device, where a pin is coupled to the release lever in the off position, allowing direct action on the release lever to maintain the unlatched position, and can only be actuated using a special tool, ensuring only authorized personnel can switch the device back on.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If an additional external cover cap or mechanical locking device is attached to the outside of the operating lever, then security against unauthorized switching is improved, but device complexity and production effort increase
Solution Approach 1:
The locking device is merged with the installation switching device itself. The locking mechanism is integrated into the housing structure, with the locking lever (32) and pin (33) becoming part of the device's internal architecture rather than external attachments. This eliminates the need for separate external locking components while maintaining security functionality.
Solution Approach 2:
The locking mechanism is nested within the housing (1) of the installation switching device. The locking lever (32) is arranged inside the housing and interacts with the pin (33) that extends into the interior. This nested arrangement allows the locking function to be contained within the device's existing structure, avoiding external additions.
2Reliability
If an external locking device is attached to the outside of the installation switching device, then security is improved, but additional parts and production complexity are required
Solution Approach 1:
The locking function is merged with the device's internal structure. The locking lever (32) and pin (33) are integrated components that work together with the existing switching mechanism, eliminating the need for separate external locking parts and simplifying manufacturing.
3Reliability
If a complex internal locking mechanism with additional slides is used, then security is improved, but device complexity increases
Solution Approach 1:
The complex slide mechanism from previous designs is extracted and replaced with a simpler direct-acting system. The pin (33) directly acts on the release lever (31) without requiring intermediate slides or complex adjustment mechanisms, maintaining security while reducing internal complexity.
Solution Approach 2:
The pin (33) serves multiple functions: it acts as the locking element, the actuating element for the release lever (31), and the interface for the adjusting part (22). This multi-functionality eliminates the need for separate components that would increase complexity.
Data Source
Figure 1~2
Figure 3~4
AI summary
The invention relates to a locking device to prevent the unauthorised activation of an installation switch device, the switchgear of which can be moved from a latched condition into an unlatched condition by means of a trigger lever with a trigger lever actuator piece which may be operated from outside the switchgear between an on and an off position, wherein the trigger lever actuator piece is coupled to the trigger lever in the off position and holds the trigger lever in the latched condition thereof in the off position.