Orthogonal Locking Element for Switchgear Cabinet Inserts
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Solution Overview
Problem
Existing locking mechanisms for modular control cabinets fail to provide a tamper-proof, controlled method for achieving defined intermediate positions during the insertion or removal of slide-in units, posing safety risks due to the potential for unintentional manipulation.
Innovation Solution
A locking device with a locking element and unlocking slide, actuated via a push button or rotary knob, allows for differentiated locking positions by displacing the locking element along orthogonal axes, ensuring engagement with latching openings only at defined positions, preventing full release unless the push button is completely released and re-actuated.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple locking mechanism is used for slide-in units, then the device complexity is reduced, but the reliability and safety are compromised due to potential unintentional manipulation
Solution Approach 1:
The locking mechanism employs dynamic elements including a movable locking lever that can transition between locked and unlocked states, and a movable actuating element that responds to push-button actuation. The locking lever is displaceable relative to the guide rail, allowing controlled movement between positioning states while maintaining reliability without excessive complexity
Solution Approach 2:
The actuating element serves as an intermediary between the push-button and the locking lever. It translates the pushing motion into controlled displacement of the locking lever, providing a mechanical mediation that ensures reliable actuation while maintaining a relatively simple overall structure. The actuating element mediates the force transmission and motion conversion needed for safe operation
2Reliability
If defined intermediate locking positions are implemented, then the safety and control are improved, but the device complexity increases due to additional locking positions and control mechanisms
Solution Approach 1:
The guide rail is segmented with multiple discrete latching openings positioned at specific intervals along its length. These openings create defined intermediate locking positions (first, second, and third positions) that segment the continuous movement path into controlled discrete states. This segmentation allows the locking mechanism to engage at specific predetermined positions without requiring complex control systems
Solution Approach 2:
The locking mechanism utilizes a second dimension of movement perpendicular to the primary insertion direction. The locking lever moves in a direction substantially perpendicular to the guide rail's longitudinal axis, allowing it to engage with latching openings at different positions along the insertion path. This dimensional approach enables multiple locking positions without increasing complexity in the primary motion dimension
3Device complexity
If the locking element is mounted directly on the slide-in unit, then the device complexity is reduced, but the reliability is compromised as the locking element cannot be independently actuated
Solution Approach 1:
The locking element is mounted on a movable actuating element rather than being fixed directly to the slide-in unit. This dynamic mounting allows the locking element to be independently displaced by the actuating element in response to push-button actuation, enabling controlled locking and unlocking while maintaining a relatively simple overall structure
Solution Approach 2:
The locking element is nested within or mounted on the actuating element, which itself is part of the locking mechanism assembly. This nested arrangement allows the locking element to be carried and actuated by the actuating element, providing independent controllability while integrating smoothly into the overall structure without excessive complexity
Data Source
AI summary
The invention relates to a locking apparatus for an insert (6), in particular for an insert of an electrical and/or electronic and/or optical switchgear cabinet, which insert is displaceably mounted in a guide (4, 5) having a plurality of latching-in openings (18), wherein the locking apparatus can be operated by means of a pushbutton (8) or slide which is accessible from the outside. According to the invention, a locking apparatus of this kind is characterized in that a locking element (29) is arranged on the insert (6), which locking element is operatively connected to the pushbutton (8) by means of a coupling element (20) and is mounted on the insert (6) such that it can be displaced along a first displacement direction (Y) which runs substantially perpendicular to an insertion direction (Z), and which can engage in a locking manner with stationary latching-in openings (18) in different locking positions in the event of displacement of the insert (6) along the insertion direction (Z). The locking apparatus is also characterized in that the first locking element (29) is mounted in an unlocking slide (27) such that it can be displaced along the displacement direction (Y), which unlocking slide (27) is mounted on the insert (6), for its part, along a second displacement direction (X) which runs perpendicular to the insertion direction (Z) and perpendicular to the first displacement direction (Y). In this case, the locking element (29) is moved out of locking engagement when the pushbutton (8) or slide is operated, and the locking element (29) is released again by means of stationary displacement elements (16), which are provided on the guide (4, 5) and move the unlocking slide (27) along the second displacement direction (X), when the pushbutton (8) or slide is operated, so that the locking element (29) latches into the next latching-in opening (18) when the next locking position is reached as the insert (6) is displaced along the insertion direction (Z).