Screwless Pull-off Protection for Electrical Installation Devices
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Solution Overview
Problem
Existing electrical/electronic installation devices in buildings lack effective protection against unauthorized dismantling, as current solutions often rely on screws which are undesirable or impractical.
Innovation Solution
A screwless pull-off protection device using securing springs arranged in a concealed manner, allowing partial disassembly by snap connection for easy installation, with complete disassembly requiring a tool to unlock the springs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If snap connection is used for quick installation, then installation speed is improved, but protection against unauthorized dismantling deteriorates
Solution Approach 1:
The disassembly process is segmented into two distinct stages: partial disassembly (allowed) and complete disassembly (prevented). The securing spring mechanism creates an intermediate state where the installation device is partially removed but remains protected, requiring a tool for final removal. This segmentation resolves the contradiction by allowing quick installation while implementing progressive protection.
Solution Approach 2:
The securing spring is pre-configured in a concealed state during installation. When partial disassembly occurs, the spring automatically engages in a preliminary protective action, preventing complete removal. This preliminary action ensures that while quick installation is maintained, unauthorized complete dismantling is automatically prevented.
2Reliability
If screws are used for anti-theft protection, then protection effectiveness is improved, but ease of operation deteriorates
Solution Approach 1:
The traditional screw-based mechanical fastening system is replaced with a spring-based elastic retention mechanism. The securing spring provides effective anti-theft protection through elastic force rather than threaded mechanical engagement. This substitution maintains high protection effectiveness while dramatically improving ease of operation, as the spring mechanism can be actuated by a simple tool rather than requiring screwdrivers and multiple tightening/loosening operations.
Solution Approach 2:
Instead of using screws that require active loosening to release, the invention uses securing springs that are passively held in a constrained state and automatically engage when disturbed. The normal state is locked (spring engaged), and release requires active intervention with a tool. This inversion of the conventional screw mechanism provides both effective protection and operational ease.
3Reliability
If pull-off protection device is added, then protection against unauthorized dismantling is improved, but device complexity increases
Solution Approach 1:
The securing spring mechanism is merged with the existing snap spring arrangement and carrier structure. The pulling elements are integrated into the housing and carrier assembly, creating a unified protection system rather than adding separate components. This merging approach provides effective anti-theft protection while minimizing the increase in device complexity.
Solution Approach 2:
The securing spring serves multiple functions: it provides the primary snap connection for installation, enables partial disassembly for maintenance, and activates anti-theft protection against complete removal. This multi-functionality reduces the need for separate components, thereby limiting the increase in device complexity while achieving comprehensive protection.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Effectively prevents unauthorized complete dismantling by allowing only partial removal initially, with the anti-removal device engaging automatically after partial disassembly, requiring a tool for full removal, thus enhancing security without screws.
Implementation Method 1
holding it together with a carrier fixed to the installation box via a snap spring arrangement
Implementation Method 2
Two shafts (9) for receiving a securing spring (10) are present in the housing (7) of the insert (2) on the back. The two securing springs (10) can each be fixed on the one hand with two first holding means (11) in the associated shaft (9) and on the other hand each have two second holding means (12) which protrude beyond the shaft (9) and which, in order to prevent dismantling, snap into place on the carrier (6) fixed on the installation box (1).
Data Source
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AI summary
An electrical/electronic installation device for building systems engineering is proposed, which is equipped with an insert to be housed in an installation box, wherein the insert has connecting elements on the back for connection to an installation system of a building and cooperates holdingly with a carrier fixed to the installation box and wherein the insert is provided with an attachment on the front.For the purpose of creating an electrical/electronic installation device with a pull-out protection device, which ensures effective protection against unauthorized disassembly of such electrical/electronic installation devices in a simple manner without the use of screws, at least one shaft for receiving a locking spring is provided on the back of the insert housing, and the locking spring can be secured in the shaft by at least one first retaining element, and the locking spring has at least one second retaining element projecting beyond the shaft, which engages with the carrier fixed to the installation box to prevent disassembly.