Electrical Front Plate Centering for Uniform Insert Gaps
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Solution Overview
Problem
Existing cover frames for electrical installation devices face issues with non-uniform gaps between socket inserts and the frame due to manufacturing tolerances, leading to unintentional movement of rocker switches during activation.
Innovation Solution
Incorporation of centering projections in the frame's side walls and centering recesses in the insert, along with bearing pins and centering wedges, ensures uniform gap dimensions and central support for both inserts and rocker switches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a cover frame is held on a socket by means of a clamping element or by a socket insert screwed to the socket, then the socket insert can be secured to the frame, but the gap between the socket insert and the cover frame is not uniform due to manufacturing tolerances
Solution Approach 1:
Centering projections are integrated into the frame structure before assembly, which preliminarily establish the correct positioning and uniform gap dimensions. This preliminary centering action eliminates the need for manual adjustment and ensures consistent gaps despite manufacturing tolerances in the clamping elements or socket inserts.
Solution Approach 2:
The centering projections act as intermediary elements between the frame and the socket insert, mediating the positioning relationship. These projections transfer and maintain the uniform gap dimension from the frame to the socket insert, compensating for variations in the clamping elements or screw connections.
2Ease of operation
If rocker switches are mounted in the cover frame, then the switches can be installed and activated, but they are moved unintentionally when activated due to lack of central support
Solution Approach 1:
The centering projections are pre-positioned on the frame to provide central support points for the rocker switches. This preliminary positioning ensures that the rocker switches are correctly aligned and supported before actuation, preventing unintentional movement during operation.
Solution Approach 2:
The centering projections serve as intermediary support elements between the frame and the rocker switches. They provide the necessary central support to stabilize the rocker switches during actuation, mediating the force transmission and preventing lateral movement.
3Manufacturing precision
If manual adjustment is performed to achieve uniform gaps, then the gap uniformity can be improved, but the installation time and complexity increase
Solution Approach 1:
The centering projections enable the frame and socket insert to self-center automatically during assembly. The geometric shape and positioning of the projections cause the components to align themselves, achieving uniform gaps without requiring manual measurement or adjustment, thereby reducing installation time and complexity.
Data Source
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AI summary
A front plate for an electrical installation device has a square opening with four sidewalls, a centering projection being provided in the center of each sidewall.