Flush-Mount Door Handle with Rotating Inner Grip

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Solution Overview

Problem

Shower partition door handles often obstruct cleaning of the inner surface when protruding, and a single outer handle complicates door closure and handling.

Innovation Solution

A handle arrangement with a second handle mounted flush to the inner surface, featuring a moveable handle element that rotates about a pivot axis, allowing it to be flush with the surface for cleaning and protruding for easy grip and operation, connected to the outer handle via a radial extension and screw mechanism.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of operation

If a second handle is arranged on the inner surface of the door, then door handling and closing is improved, but cleaning of the inner surface becomes difficult due to obstruction

Engineering Contradiction:

Improvedoor handlingVSAvoidcleaning accessibility

Core Design Contradiction:

Ease of operationVSEase of manufacture

Solution Approach 1:

The second handle on the inner surface is designed as a movable element that can be rotated between a retracted position (flush with the inner surface for cleaning) and an extended position (protruding for door operation). This dynamic configuration allows the handle to adapt its state based on whether cleaning or operation is required, resolving the contradiction between ease of operation and cleaning accessibility.

Inventive Principle:

Principle #15Dynamics

2Ease of operation

If a second handle protrudes from the inner surface for easy gripping, then door closure handling is improved, but the handle obstructs cleaning of the inner surface

Engineering Contradiction:

Improvegripping easeVSAvoidcleaning obstruction

Core Design Contradiction:

Ease of operationVSObject-affected harmful factors

Solution Approach 1:

The handle element is designed to move between protruding and retracted positions. When cleaning is required, the handle is rotated to lie flush with the inner surface, eliminating obstruction. When door operation is needed, the handle protrudes for easy gripping. This dynamic positioning resolves the contradiction between gripping ease and cleaning accessibility.

Inventive Principle:

Principle #15Dynamics

3Quantity of substance

If only a single outer handle is arranged on the door, then material usage and construction volume are reduced, but door closure handling becomes more difficult

Engineering Contradiction:

Improvematerial usageVSAvoiddoor closure handling

Core Design Contradiction:

Quantity of substanceVSEase of operation

Solution Approach 1:

The handle arrangement is designed so that the same connecting body and connecting element serve dual purposes: the first handle on the outer surface and the second handle on the inner surface both connect to the door through the same penetrating structure. This multi-functional design provides easy door closure handling from both surfaces while minimizing additional material usage compared to completely separate handle structures.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Data Source

PatentEP2492418B1Grip assembly of a door in a partition wall

Publication Date: 2019.11.27 ALTURA LEIDEN HLDG BV

Figure 1~4
Figure 3

AI summary

Handle assembly has a main handle (8) that is provided in an outer surface (4) of the door (2), and a sub handle (10) that is provided in an inner surface (6) the door. The main handle and sub handle are connected with each other. The outside surface of door is made to face an outer chamber (5), when door is in closed position. A grip element (40) is engaged with the inner surface of sub handle and is movable between the initial and finial positions.