Door Handle Fitting with Threaded Adjustment and Magnetic Coupling

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Solution Overview

Problem

Existing handle arrangements for doors and windows require complex and time-consuming adaptations to fit the rod and washers or cover plates, which are not easily adjustable to varying thicknesses without measurement tools and at low cost.

Innovation Solution

An adjustable coupling system that includes a rod with transverse grooves and a resilient dead plate for handle adjustment, and an adjustment device with a threaded mechanism and annular magnet for securing washers or cover plates, allowing for quick and cost-effective fitting and removal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If traditional handle arrangements use fixed-length rods and through-going screws, then the structure is simple, but the fitting process becomes complicated and time-consuming when adapting to different door thicknesses

Engineering Contradiction:

Improveadaptability to different door thicknessesVSAvoidcomplexity of fitting process

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The rod is designed with a telescopic structure that allows it to extend or retract to different lengths, enabling adaptation to various door thicknesses. The rod includes an inner rod and an outer rod that can slide relative to each other, with locking mechanisms to fix the rod at the required length during installation

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The traditional fixed rod is divided into multiple segments (inner rod and outer rod) that can move independently. This segmentation allows the rod to be adjusted to different lengths without requiring custom cutting for each door thickness, simplifying the fitting process

Inventive Principle:

Principle #1Segmentation

2Productivity

If washers or cover plates are fixed using through-going screws cut to specific lengths, then the fixing is secure, but the detailed adaptation becomes time-consuming

Engineering Contradiction:

Improvefitting speedVSAvoidprecision of washer position

Core Design Contradiction:

ProductivityVSManufacturing precision

Solution Approach 1:

The washer or cover plate is equipped with an integrated adjustment device that automatically adjusts its position along the rod based on the door thickness. The adjustment device includes a threaded mechanism that allows the washer to be positioned at the correct distance from the door surface without requiring precise pre-cutting of screws

Inventive Principle:

Principle #25Self-service

Solution Approach 2:

The adjustment device serves multiple functions: it positions the washer at the correct distance, secures the washer to the rod, and allows for easy adjustment to different door thicknesses. This multi-functional design eliminates the need for separate adjustment mechanisms and simplifies the overall fitting process

Inventive Principle:

Principle #6Universality (Multi-functionality)

3Ease of operation

If adjustable couplings are used for handles, then handle position can be adapted, but the adjustment mechanism increases device complexity

Engineering Contradiction:

Improveease of handle adjustmentVSAvoidcomplexity of adjustment mechanism

Core Design Contradiction:

Ease of operationVSDevice complexity

Solution Approach 1:

The adjustment mechanism uses a simple threaded connection instead of complex mechanical adjustment systems. The threaded mechanism allows for easy adjustment of the washer position by simply rotating the adjustment device, eliminating the need for intricate mechanical linkages or multiple adjustment components

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

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

Enables rapid and simple adjustment of handle and washer positions to match door thickness, ensuring secure fitting and easy disassembly without requiring measurement tools, while accommodating various door thicknesses and stresses.

Implementation Method 1

there is provided in the adjustment device an annular magnet which, in use, generates a magnetic field having a flux path extending through the coupling and the lock chamber

Methodology Applied

Scientific EffectMagnetic field: Magnetic Field

Data Source

PatentEP2480739B1A fitting arrangement for a door handle

Publication Date: 2017.04.05 URFIC IND DE FERRAGENS

AI summary

A fitting arrangement for a handle (2, 3) in a door (1) of predetermined thickness, the door (1) having an interior lock chamber (6). A rod (4) interconnects two handles (2, 3) with the lock chamber (6). Between each handle (2, 3) and the door (1), there is a washer or cover plate (16) through which the rod (4) extends. The rod (4) is, depending on the predetermined thickness, insertable to a greater or lesser distance in an opening (8) in the one handle (2, 3) and fixable there via an adjustable coupling (9, 10). According to the invention, the washer or cover plate (16) is connected to an adjustment device (20) for adaptation of the position of the washer or cover plate (16) to the predetermined thickness. The adjustment device (20) has a coupling (24) with a magnet for fixing of the adjustment device on the lock chamber (6). The adjustment device (20) has an outer part (18) intended for securing on the washer or cover plate and an inner part (19) with the magnet, the outer and the inner parts being adjustably connected to one another by the intermediary of a thread union.