Movable Bed Chair Back Sliding Rail Mechanism

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional movable beds cannot achieve a back lifting posture over the entire width when combined with a wheelchair, limiting their functionality and usability in nursing care scenarios.

Innovation Solution

A movable bed design that incorporates a chair back bottom with a rail member and a first chair frame, allowing the chair back bottom to be slidable along the rail member and disengageable in a cutout portion, enabling back lifting over the entire width of the bed when combined with a wheelchair.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the conventional movable bed configuration is used, then the platform truck can be separated and utilized as a wheelchair, but a back lifting posture cannot be realized over the entire width of the bed

Engineering Contradiction:

Improveback lifting posture capabilityVSAvoidlimitation in nursing care functionality

Core Design Contradiction:

Adaptability or versatilityVSEase of operation

Solution Approach 1:

The bed is divided into a bed main body and a separable platform truck portion that can function as a wheelchair. The platform truck includes a chair back bottom with a rail member and sliding portion that enables independent movement and positioning, allowing the back lifting function to be segmented and applied specifically to the wheelchair portion while maintaining bed functionality

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The chair back bottom is designed with a sliding portion that can move along the rail member, allowing dynamic adjustment of the back lifting posture. The sliding mechanism enables the back bottom to be positioned at different locations along the rail, providing adaptability for various nursing care scenarios while maintaining the ability to lift the entire width of the bed

Inventive Principle:

Principle #15Dynamics

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 back lifting posture over the entire width of the bed when used as a wheelchair, enhancing safety and usability in nursing care applications.

Implementation Method 1

a first chair frame installed rotatably about a rotation point with respect to the chair base portion

Methodology Applied

Scientific EffectRotation:

Implementation Method 2

a sliding portion engaged with the rail member so as to be slidable along the rail member

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS9004508B2Movable bed

Publication Date: 2015.04.14 PANASONIC HOLDINGS CORP

AI summary

In a movable bed composed by combining a bed main portion and a wheelchair, the wheelchair has chair back bottom rails having cutout portions in a chair back bottom, and a chair back guide portion installed rotatably about a rotation point with respect to a chair base portion, the chair back guide portion having sliding portions engaged with the chair back bottom rails so as to be slidable and arranged to be disengageable from the chair back bottom rails by being located in the cutout portions, and in a fourth state (flat posture), the sliding portions are located in the cutout portions, the chair back guide portion and the chair back bottom are disengaged so as to be separable from each other, and a back lifting posture of the bed main portion and the chair back bottom can be performed over the entire width of the bed, whereas in a first state (chair posture), the sliding portions are engaged with the chair back bottom rails and can slide along the chair back bottom rails.