Snap-Together Duct Device Holder With Recessed Locking

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Solution Overview

Problem

Existing device holders for electrical installation devices like lamps, cameras, or monitors attached to cable routing ducts require external holding structures and can obstruct cable routing, limiting their versatility and ease of installation.

Innovation Solution

A device holder comprising a snap-together design with a recessed upper part and a fastening tongue on the lower part, allowing secure attachment to the duct without internal fastening elements, enabling easy positioning and adjustment along the duct for optimal installation height, and using adapter plates for various device types.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If device holders use external holding structures to attach to ducts, then attachment security is improved, but cable routing is obstructed and device complexity increases

Engineering Contradiction:

Improveattachment securityVSAvoidcable routing obstruction

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The device holder is nested within the duct base structure itself. The holder consists of a lower part that attaches directly to the duct base and an upper part that receives the device, eliminating the need for external holding structures. This nesting approach maintains attachment security while keeping the cable routing space clear and unobstructed.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Ease of manufacture

If device holders are designed with fixed mounting positions, then installation simplicity is improved, but adaptability to different installation heights is worsened

Engineering Contradiction:

Improveinstallation simplicityVSAvoidinstallation height flexibility

Core Design Contradiction:

Ease of manufactureVSAdaptability or versatility

Solution Approach 1:

The device holder incorporates movable components that allow adjustment along the duct base. The lower part can be positioned at different locations on the duct base, and the upper part can be adjusted vertically within the lower part's structure, enabling the holder to adapt to various installation heights while maintaining a simple snap-together installation process.

Inventive Principle:

Principle #15Dynamics

3Strength

If device holders use multiple fastening elements inside the duct, then attachment strength is improved, but cable routing is blocked and device complexity increases

Engineering Contradiction:

Improveattachment strengthVSAvoidfastening element complexity

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The fastening elements have been extracted from the interior of the duct base and repositioned to the exterior or integrated into the holder's snap-together mechanism. The lower part of the holder attaches to the duct base using simple snap-fit connections on the exterior, eliminating the need for internal fastening elements that would obstruct cable routing while maintaining sufficient attachment strength.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentEP2034575B1Apparatus holder for fastening electroinstallation devices to a conductive channel

Publication Date: 2018.11.07 TEHALIT

Figure 1
Figure 2

AI summary

The carrier device has an upper part (10) with two lateral shanks (13), whose sides are sloping downward. The lateral shanks support the upper part against a channel lower part (20). A lower part (30) is provided, which clicks with the upper part. A front-sided fastening tongue (34) is located on the lower part. The front-sided fastening tongue cooperates with a recess (15) formed on front side of the upper part such that the upper part is locked with the lower part on the front side.