Connection Assembly Insulating Claw Sections Touch Protection
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Solution Overview
Problem
Electrical connections pose a hazard due to the risk of accidental human contact, as existing solutions fail to adequately protect against finger touch.
Innovation Solution
A connection arrangement featuring insulating bodies with claw sections and a threaded insert, where the contact means is recessed within a housing wall, ensuring that cable lugs can be connected while preventing access with human fingers or standardized test fingers, utilizing metal and plastic components for insulation and secure screw connections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If the space between insulating bodies is made small to prevent finger contact, then touch protection is improved, but cable lug insertion becomes difficult
Solution Approach 1:
The first insulating body is divided into multiple claw sections that are spaced apart circumferentially. This segmentation creates discrete openings between the claw sections through which cable lugs can be inserted, while the insulating material between the claw sections prevents finger contact. The segmentation allows the structure to simultaneously provide protection and enable cable access.
Solution Approach 2:
The insulating body has different properties in different locations: the claw sections provide structural support and define insertion paths, while the spaces between claw sections are dimensioned to allow cable lugs but block fingers. The local geometry varies to achieve both protection and operability - narrow gaps for protection, larger openings for cable insertion.
2Object-affected harmful factors
If the contact means is recessed within the housing wall to improve safety, then touch protection is improved, but electrical connection accessibility worsens
Solution Approach 1:
The first insulating body acts as an intermediary structure that bridges the recessed contact means and the external environment. It provides a protected interface where cable lugs can be inserted through the claw section openings to make electrical connections, while preventing direct finger access to the recessed contact means. The insulating body mediates between safety requirements and connection accessibility.
3Object-affected harmful factors
If insulating bodies are used to protect electrical connections, then touch protection is improved, but mechanical robustness of screw connection may worsen
Solution Approach 1:
The connection assembly uses composite construction combining insulating material (first insulating body with claw sections) and metallic components (contact means with external thread, threaded insert). The insulating body provides electrical isolation and finger protection, while the metal threaded insert embedded in the insulating body provides robust mechanical screw connections. This composite approach allows both electrical safety and mechanical strength.
Data Source
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AI summary
The invention relates to a connection assembly for an electrical device, and to an electrical device having a connection assembly, wherein a first insulation body (2) is arranged in a particularly continuous recess, in particular an opening, of a housing wall (5) of the electrical device, in particular forming a screw connection with the housing wall (5), wherein a contact means (1) is guided through the first insulation body (2) and therefore directed through the recess, wherein the contact means (1) is at a distance from the housing wall (5), and wherein the contact means (1) has an outer thread onto which a thread insert (9) is screwed by the inner thread thereof, wherein the thread insert (9) is accommodated by a second insulation body (3) or is introduced into a second insulation body (3), wherein one or more cable lugs are each connected to a cable (8), wherein the cable lug(s) has/have a respective tab region in the form of an eye or a fork, wherein the contact means (1) is directed through the eye, eyes or fork opening of the respective fork, wherein the tab regions are pressed from the second insulation body (3) towards the first insulation body (2), wherein the first insulation body has claw sections that overlap with the axial regions covered by the second insulation body (3), in the axial direction, in particular therefore in the screw axis direction of the outer thread, wherein the claw sections are arranged at a distance from one another in the peripheral direction, wherein a cable lug to which a cable (8) is connected is arranged between two neighbouring claw sections in the peripheral direction.