Backrest device for a piece of furniture used for sitting and/or lying on

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Solution Overview

Problem

Modern seating and reclining furniture often lacks effective adjustment options for supporting the head and back, leading to discomfort and an unattractive appearance, especially when trying to accommodate users of varying body sizes.

Innovation Solution

A backrest device with a linearly adjustable headrest that overlaps with the backrest at all positions, allowing for customizable support through both linear and pivotable adjustments, utilizing a motor-driven mechanism and manual operation, with a detachable carrier system for safety and aesthetic concealment of the motor.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the headrest is made adjustable to accommodate users of varying body sizes, then adaptability is improved, but device complexity increases

Engineering Contradiction:

Improveadjustment options for head and back supportVSAvoidmechanism complexity

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The headrest is designed with dynamic adjustment capabilities, allowing it to move linearly along a translation axis and pivot around a rotational axis. This enables the headrest to adapt to different user positions and body sizes while maintaining a relatively simple overall structure through controlled degrees of freedom

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The support structure is divided into a first support part fixedly connected to the headrest and a second support part movable by the motor, with a detachable connection between them. This segmentation allows independent movement of parts and simplifies the motor-driven adjustment mechanism

Inventive Principle:

Principle #1Segmentation

2Shape

If the motor is concealed in the backrest for aesthetic reasons, then appearance is improved, but ease of operation deteriorates

Engineering Contradiction:

Improveaesthetic appearanceVSAvoidmotor access and operation

Core Design Contradiction:

ShapeVSEase of operation

Solution Approach 1:

The support structure is segmented into detachable parts, with the motor integrated into the second support part. This allows the motor to be concealed within the backrest structure for aesthetics while still being accessible for operation and maintenance through the detachable connection interface

Inventive Principle:

Principle #1Segmentation

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

The device provides harmonious and adaptable support for users of different sizes, ensuring no gaps between the headrest and backrest, enhancing comfort and aesthetics while preventing accidental movement during motor operation.

Implementation Method 1

The detachable connection between the first support part and the second support part comprises a magnetic connection

Methodology Applied

Scientific EffectMagnetic connection: Magnetism

Data Source

PatentEP4252589B1Backrest device for a piece of furniture used for sitting and/or lying on

Publication Date: 2025.01.22 STEINPOL CENT SERVICES SP Z O O

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AI summary

The invention relates to a backrest device (100) for a piece of seating and/or reclining furniture (1) comprising a backrest (110) and a headrest (120). The headrest (120) is linearly adjustable relative to the backrest (110) between a first position and a second position along a translational axis (T). The headrest (120) has an overlapping section (124) that always overlaps with a portion of the backrest (110), so that no gap is created between the backrest (110) and the headrest (120) when the headrest (120) is in the first position, the second position, and an intermediate position.